Q2V Driving Quality. Technical Manual (Item code: Q2V-Axxxx-xxx, 2020)

6.3 Modbus Communications

Command Message

Response Message (When Normal)

Response Message (When There is a Fault)

Byte

Setting Data

(Hex.)

Upper

Holding register

2 data

Lower

Upper

CRC-16

Lower

Note:

The number of bytes set in the command message set the data quantity × 2 during the command message.

When you rewrite the parameter value with the write command through the H5-11 [Mbus ENTER Command

Mode] setting, you must use the Enter command to save and enable the contents of the changes.

◆ Enter Command

When you use Modbus communications to write parameters from the PLC to the drive, the H5-11 [Mbus ENTER

Command Mode] setting sets the function to enable these parameters from the Enter command. This section gives

information about the Enter command.

■ Types of Enter Commands

The drive supports the two Enter commands.

Table 6.9 Types of Enter Commands

Description

(Hex.)

When you write parameter data to the EEPROM, you will enable the data on the RAM at the same time.

0900

This process saves the parameter changes until you de-energize the drive.

This updates the data on the RAM, but does not write data to the EEPROM.

0910

This process saves the parameter changes until you de-energize the drive.

Write 0 to register number 0900 or 0910 (Hex.) to enable the Enter command. You can only write to these

registers. If you read to these registers, it will cause an error.

Note:

• You can write the EEPROM to the drive a maximum of 100,000 times. Do not frequently execute the Enter command (0900 (Hex.))

that is written to EEPROM. The Enter command register is write-only. If this register is read, it will cause a Register Number Error (02

(Hex.)).

• When the command data or broadcast message is transmitted to the drive, the Enter command is not necessary.

◆ Self-Diagnostics

The drive can use Self-Diagnositcs to find the operation of the serial communications interface circuit. Self-

Diagnostics connects the transmission terminal to the reception terminal on the control circuit. It then transmits

the data sent by the drive and makes sure that the drive can communicate correctly.

1. Energize the drive.

2. Set H1-06 = 7F [DI6 Function Selection = Comms Test].

3. De-energize the drive.

199

6.3 Modbus Communications

Table 6.10 Modbus Communications Command Data

Description

0000

Reserved

MFDO setting

Run command, multi-function input command

MFDO (terminal NO-CM)

bit 0

1: ON, 0: OFF

When H5-12 = 0, Forward run/stop

1: Forward run, 0: Stop

Multi-function photocoupler output 1 (terminal

bit 0

bit 1

DO1-O1C)

When H5-12 = 1, run/stop

0009

1: ON, 0: OFF

1: Run, 0: Stop

Multi-function photocoupler output 2 (terminal

When H5-12 = 0, Reverse run/stop

bit 2

DO2-O2C)

1: Reverse run, 0: Stop

bit 1

1: ON, 0: OFF

When H5-12 = 1, Forward/Reverse run

1: Reverse, 0: Forward run

bit 3 -

Reserved

External fault

bit 2

000A

Pulse train output (Units: 1/1 Hz, setting range: 0 to 32000)

1: EF0 [Option Card External Fault]

000B - 000E

Reserved

Fault Reset

bit 3

1: Reset command

Command selection setting

Multi-function input 1

bit 0

Reserved

When the multi-function input command is H1-01 =

1 [Forward Run], bit 4 is “ComRef.”

Input for the PID setpoint

bit 1

Note:

1: Enables target values from Modbus

bit 4

When you switch the bit ON as ComRef, the

frequency reference source changes to Modbus

Torque Limit Input

bit 2

0001

communications. When you connect a

1: Enables setting values from Modbus

communication option to the drive, the

frequency reference source gives priority to the

Torque Compensation Input

communications option.

bit 3

1: Enables setting values from Modbus

Multi-function input 2

bit 4

Reserved

When the multi-function input command is H1-02 =

2 [Reverse Run], bit 5 is “ComCtrl.”

PID feedback from the Modbus

000F

Note:

bit 5

1: Enables PID feedback (15FF (Hex.)) from

bit 5

When you switch the bit ON as ComCtrl, the

Modbus

Run Command source changes to Modbus

communications. When you connect a

bit 6 -

Reserved

communication option to the drive, the Run

Command source gives priority to the

communications option.

Terminal DI5 input of broadcast message

bit C

1: Enabled, 0: Disabled

bit 6

Multi-function input 3

Terminal DI6 input of broadcast message

bit 7

Multi-function input 4

bit D

1: Enabled, 0: Disabled

bit 8

Multi-function input 5

Terminal DI7 input of broadcast message

bit E

bit 9

Multi-function input 6

1: Enabled, 0: Disabled

bit A

Multi-function input 7

bit F

Reserved

bit B -

0010 - 001F

Reserved

bit 0

Extended multi-function input command 1

Fre

quency

o1-03 [FrqDisplay Unit Selection] (unsigned) sets

bit 1

Extended multi-function input command 2

0002

Refer

the units.

ence

15C0

bit 2

Extended multi-function input command 3

Output

Units: 0.1%

bit 3 -

0003

voltage

Setting range: 20 (2.0%) to 2000 (200.0%), the

Reserved

gain

default value at energize: 1000 (100.0%)

Time Setting

0004

Torque limit (0.1% signed)

Setting range: 0000 to 2359 (decimal), the default value at

energize: 0000

0005

Torque compensation (0.1% signed)

3004

Set the hour and the minute in HHMM format.

0006

PID setpoint (0.01% signed)

• HH: 00 to 23 (decimal)

• MM: 00 to 59 (decimal)

Setting for the multi-function analog monitor output terminal

0007

AO (10 V/4000 (Hex.))

0008

Reserved

201

6.3 Modbus Communications

Table 6.11 Monitor Data for Modbus Communication

Description

Drive Status 1

Fault Contents

During Run

bit 0

1: During data writing, during motor switching

bit 0

1: During run, 0: During stop

bit 1

During reverse

Reserved

bit 1

bit 2

1: During reverse, 0: Forward run

Drive ready

bit 3

1: Upper/Lower Limit Fault

bit 2

1: Ready, 0: Not ready

bit 4

1: Data Integrity Fault

0022

Fault

bit 3

bit 5

1: During EEPROM writing

1: Fault

0: EEPROM writing

Data Setting Error

bit 4

1: Change data only on the RAM

1: oPExx error

bit 6

Note:

MFDO (terminal NO/NC-CM)

Enabled when H5-17 = 2 [ENTER@CPU Busy

0020

bit 5

Response = Write RAM Only].

1: ON, 0: OFF

bit 7 -

Multi-function photocoupler output 1 (terminal

Reserved

bit 6

DO1-O1C)

1: ON, 0: OFF

U1-01 [Frequency Reference]

0023

Note:

Multi-function photocoupler output 2 (terminal

o1-03 [FrqDisplay Unit Selection] sets the units.

bit 7

DO2-O2C)

1: ON, 0: OFF

U1-02 [Output Frequency]

0024

Note:

bit 8 -

Reserved

o1-03 [Frequency Display Unit Selection] sets the units.

ComRef status

U1-06 [Output Voltage Ref] (units: 0.1 V)

bit E

1: Enabled

0025

Note:

Use H5-10 [Mbus 0025H Unit Sel] to change the setting

ComCtrl status

bit F

unit.

1: Enabled

0026

U1-03 [Output Current] (units: 0.1 A)

Fault Description 1

0027

U1-08 [Output Power]

bit 0

oC [Overcurrent], GF [Ground Fault]

0028

U1-09 [Torque Reference]

bit 1

ov [Overvoltage]

Fault Description 2

bit 2

oL2 [Drive Overload]

bit 0

Reserved

oH1 [Heatsink Overheat], oH2 [External Overheat

bit 3

(H1-XX=7D)]

bit 1

GF [Ground Fault]

rH [Braking Resistor Overheat], rr [Dynamic

bit 4

bit 2

PF [Input Phase Loss]

Braking Transistor Fault]

bit 3

LF [Output Phase Loss]

bit 5

Reserved

0029

bit 4

rH [Braking Resistor Overheat]

FbL [PID Feedback Loss], FbH [Excessive PID

bit 6

Feedback]

bit 5

Reserved

EF0 [Option Card External Fault], EF1 to EF7

bit 7

[External Fault]

bit 6

oH4 [Motor Overheat Fault (PTC Input)]

0021

CPFxx [Hardware Fault]

bit 7 -

Reserved

bit 8

Note:

Includes oFx.

oL1 [Motor Overload], oL3, oL4 [Overtorque

bit 9

Detection 1/2], UL3, UL4 [Undertorque Detection

1/2]

PGo [Encoder (PG) Feedback Loss], oS

bit A

[Overspeed], dEv [Speed Deviation]

bit B

During Uv [Undervoltage] detection

Uv1 [DC Bus Undervoltage], Uv2 [Control Power

bit C

Undervoltage], Uv3 [Soft Charge Answerback

Fault]

bit D

LF [Output Phase Loss], PF [Input Phase Loss]

CE [Modbus Communication Error], bUS [Option

bit E

Communication Error]

bit F

Reserved

203

6.3 Modbus Communications

Description

Minor Fault Description 1

Drive Status 2

bit 0 -

During Run

Reserved

bit 0

1: During Run

bit 2

EF [FWD/REV Run Command Input Error]

During zero speed

bit 1

1: During zero speed

bit 3

bb [Baseblock]

Speed agreement

bit 4

oL3 [Overtorque 1]

bit 2

1: During agreement

bit 5

oH [Heatsink Overheat]

User-defined speed agreement

bit 3

bit 6

ov [Overvoltage]

1: During agreement

bit 7

Uv [Undervoltage]

Frequency Detection 1

bit 4

1: Output frequency ≤ L4-01

002A

bit 8

Reserved

Frequency Detection 2

bit 5

bit 9

CE [Modbus Communication Error]

1: Output frequency ≥ L4-01

bit

Drive ready

bUS [Option Communication Error]

bit 6

1: Run ready

bit B

UL3/UL4 [Undertorque Detection 1/2]

During low voltage detection

bit 7

bit C

oH3 [Motor Overheat (PTC Input)]

002C

1: During detection

FbL [PID Feedback Loss], FbH [Excessive PID

During baseblock

bit D

bit 8

Feedback]

1: Drive output during baseblock

bit E

Reserved

Frequency reference mode

bit 9

1: No communication option, 0: Communication

bit F

CALL [Serial Comm Transmission Error]

option

U1-10 [In Terminal Status]

Run command mode

bit A

1: No communication option, 0: Communication

bit 0

1: Control circuit terminal DI1 ON

option

bit 1

1: Control circuit terminal DI2 ON

bit B

During overtorque/undertorque 1, 2 detection

bit 2

1: Control circuit terminal DI3 ON

Frequency reference loss

bit C

1: Loss

bit 3

1: Control circuit terminal DI4 ON

002B

Executing Auto-Restart

bit 4

1: Control circuit terminal DI5 ON

bit D

1: Restart Enabled

bit 5

1: Control circuit terminal DI6 ON

Fault

bit E

bit 6

1: Control circuit terminal DI7 ON

1: Fault generated

bit 7

Modbus communications timeout

Reserved

bit F

1: At Timeout

U1-11 [Output Terminal Status]

MFDO (terminal NO/NC-CM)

bit 0

1: ON, 0: OFF

Multi-function photocoupler output 1 (terminal

bit 1

DO1-O1C)

002D

1: ON, 0: OFF

Multi-function photocoupler output 2 (terminal

bit 2

DO2-O2C)

1: ON, 0: OFF

bit 3 -

Reserved

002E

Reserved

Frequency reference bias (Up 2/Down 2 function) (Units:

002F

0.1%)

0030

Reserved

0031

U1-07 [DC Bus Voltage] (unit: 1 V)

0032

U1-09 [Torque Reference] (unit: 1%)

0033

Reserved

0034

Product Code 1 (2-character ASCII code), Q2V = “0A”

0035

Product Code 2 (2-character ASCII code), Q2V = “52”

0036 - 0037

Reserved

PID Feedback: Unsigned, input is equivalent to 100%/

0038

maximum output frequency (Units:0.1%)

204

6.3 Modbus Communications

Description

PID Input: Signed, ±100%/±maximum output frequency

Drive rated current

0039

(Units:0.1%)

Note:

PID Output: Signed, ±100%/±maximum output frequency

00AB

The unit of display is different for different models.

003A

(Units:0.1%)

2001 to 2042, B001 to B018, 4001 to 4023: 0.01 A

2056 to 2082, 4031 to 4060: 0.1 A

003B - 003C

Reserved

Units: min^-1 or r/min

Communications error description

00AC

Note:

U1-05

[Motor

Set E2-04, E4-04, E5-04, E9-08 [Motor Pole

The drive saves the description of the communications

Speed]

Count].

error until you reset the fault.

00AD

Units: 0.01%

bit 0

CRC Error

00AE, 00AF

Reserved

bit 1

Data Length Error

The drive stores option codes in the register.

bit 2

Reserved

003D

SI-C3 = 5343 (Hex.)

bit 3

Parity Error

SI-EM3 = 1005 (Hex.)

SI-EN3 = 1006 (Hex.)

bit 4

Overrun Error

Option

SI-EP3 = 1007 (Hex.)

codes

bit 5

Framing Error

00B0

connec

SI-ES3 = 1001 (Hex.)

ted to

SI-ET3 = 1004 (Hex.)

CN5

bit 6

Timeout

SI-N3 = 534E (Hex.)

bit 7 -

SI-P3 = 5350 (Hex.)

Reserved

SI-S3 = 5353 (Hex.)

SI-T3 = 5354 (Hex.)

Units: min^-1 or r/min

Note:

00B1 - 00B4

Reserved

003E

Output

fre

Set E2-04, E4-04, E5-04, E9-08 [Motor Pole

quency

Count].

Units: min^-1 or r/min

U1-16

[SFS

Note:

003F

0.01% units

00B5

Output

Set E2-04, E4-04, E5-04, E9-08 [Motor Pole

Fre

Count].

Used with [U1: STATUS]. Refer to “U Monitor” for more

quenc

0040 - 004A

information.

00B6

Units: 0.01%

U1-12 [Drive Status]

Units: min^-1 or r/min

Fre

bit 0

1: During Run

quency

Note:

00B7

refer

Set E2-04, E4-04, E5-04, E9-08 [Motor Pole

bit 1

1: During zero speed

ence

Count].

moni

bit 2

1: During reverse

00B8

tor

Units: 0.01%

bit 3

1: During reset signal input

00B9 - 00BE

Reserved

bit 4

1: During speed agreement

Operation error number

00BF

xx of oPExx is displayed.

bit 5

1: Drive operation ready

Fault Description 3

bit 6

1: Minor Fault

004B

bit 0

Reserved

bit 7

1: Fault

bit 1

Uv1 [DC Bus Undervoltage]

bit 8

1: oPExx [Operation Error] generation

bit 2

Uv2 [Control Power Undervoltage]

1: Recovery from momentary power loss, 0: Power

bit 9

recovery

bit 3

Uv3 [Soft Charge Answerback Fault]

bit A

1: Motor 2 Selection

bit 4

SC [Short Circuit/IGBT Failure]

bit B

Reserved

bit 5

GF [Ground Fault]

bit E

ComRef status/ NetRef status

bit 6

oC [Overcurrent]

bit F

ComCtrl status/ NetCtrl status

00C0

bit 7

ov [Overvoltage]

Use with U1-xx, U4-xx, U5-xx, U6-xx [Monitors]. Refer to

004C - 007E

bit 8

oH [Heatsink Overheat]

“U Monitor” for more information.

Minor fault code (Refer to “Minor fault description” for more

bit 9

oH1 [Heatsink Overheat]

007F

information about the minor fault codes.)

bit A

oL1 [Motor Overload]

Use with U2-xx, U3-xx [Monitors]. Refer to “U Monitor” for

0080 - 0097

more information, and refer to “Fault Trace/Fault History

bit B

oL2 [Drive Overload]

Descriptions” for more information about register values.

bit C

oL3 [Overtorque Detection 1]

U4-01 [Cumulative OpeTime]

0098 - 0099

Example: When U4-01 [Cumulative OpeTime] = 12345,

bit D

oL4 [Overtorque Detection 2]

0098 (Hex.) = 1234 and 0099 (Hex.) = 5.

bit E

rr [Dynamic Braking Transistor Fault]

U4-03 [Fan Oper.Time]

009A - 009B

Example: When U4-03 [Fan Oper.Time] = 12345, 009A

bit F

rH [Braking Resistor Overheat]

(Hex.) = 1234 and 009B (Hex.) = 5.

009C - 00AA

Reserved

205

6.3 Modbus Communications

Description

Fault Description 4

Fault Description 7

bit 0

EF3 [External Fault (Terminal DI3)]

bit 0

FbH [Excessive PID Feedback]

bit 1

EF4 [External Fault (Terminal DI4)]

bit 1

EF1 [External Fault (Terminal DI1)]

bit 2

EF5 [External Fault (Terminal DI5)]

bit 2

EF2 [External Fault (Terminal DI2)]

bit 3

EF6 [External Fault (Terminal DI6)]

bit 3

oL5 [Mechanical Weakening Detection 1]

bit 4

EF7 [External Fault (Terminal DI7)]

bit 4

UL5 [Mechanical Weakening Detection 2]

bit 5 -

bit 5

CoF [Current Offset Fault]

Reserved

bit 6 -

Reserved

bit 7

oS [Overspeed]

00C1

00C4

bit 8

dEv [Speed Deviation]

bit 8

qFL [Q2pack Fault]

bit 9

PGo [Encoder (PG) Feedback Loss]

bit 9

qFL1 [EEPROM Memory Q2pack Data Error]

bit A

PF [Input Phase Loss]

bit A

qFL2 [Q2pack Fault 2]

bit B

LF [Output Phase Loss]

bit B

qFL3 [Q2pack Fault 3]

bit C

oH3 [Motor Overheat (PTC Input)]

bit C

Reserved

bit D

Reserved

bit D

rF [Braking Resistor Fault]

bit E

Err [EEPROM Write Error]

bit E

boL [BrakingTransistor Overload Fault]

bit F

oH4 [Motor Overheat Fault (PTC Input)]

bit F

Reserved

Fault Description 5

Fault Description 8

bit 0

CE [Modbus Communication Error]

bit 0

LSo [Low Speed Motor Step-Out]

bit 1

bUS [Option Communication Error]

bit 1

nSE [Node Setup Error]

bit 2 -

00C5

bit 2 -

Reserved

bit 4

CF [Control Fault]

bit A

dv7 [Polarity Judge Timeout]

bit 5

Reserved

bit B -

Reserved

00C2

bit 6

EF0 [Option Card External Fault]

00C6 - 00C7

Reserved

bit 7

FbL [PID Feedback Loss]

Minor Fault Description 2

bit 8

UL3 [Undertorque Detection 1]

bit 0

Uv [Undervoltage]

bit 9

UL4 [Undertorque Detection 2]

bit 1

ov [Overvoltage]

bit A

oL7 [High Slip Braking Overload]

bit 2

oH [Heatsink Overheat]

bit B -

Reserved

bit 3

Overheat Alarm (oH2)

bit F

Hardware Fault (includes oFx fault)

bit 4

oL3 [Overtorque 1]

Fault Description 6

bit 5

oL4 [Overtorque 2]

bit 0 -

bit 6

EF [FWD/REV Run Command Input Error]

Reserved

00C8

bit 7

bb [Baseblock]

bit 5

LF2 [Output Current Imbalance]

bit 8

EF3 [External Fault (Terminal DI3)]

bit 6

STPo [Motor Step-Out Detected]

bit 9

EF4 [External Fault (Terminal DI4)]

00C3

bit 7

Reserved

bit A

EF5 [External Fault (Terminal DI5)]

bit 8

E5 [MECHATROLINK Watchdog Timer Err]

bit B

EF6 [External Fault (Terminal DI6)]

bit 9

Reserved

bit C

EF7 [External Fault (Terminal DI7)]

bit A

SEr [Speed Search Retries Exceeded]

bit D -

bit B -

Reserved

bit F

oS [Overspeed]

206

6.3 Modbus Communications

Description

Minor Fault Description 3

Minor Fault Description 6

bit 0

dEv [Speed Deviation]

bit 0

Reserved

bit 1

PGo [Encoder (PG) Feedback Loss]

bit 1

TrPC [IGBT Maintenance Time (90%)]

bit 2

Reserved

bit 2

LT-3 [SoftChargeBypassRelay MainteTime]

bit 3

CE [Modbus Communication Error]

bit 3

LT-4 [IGBT Maintenance Time (50%)]

bit 4

bUS [Option Communication Error]

bit 4

boL [Braking Transistor Overload]

00CC

bit 5

CALL [Serial Comm Transmission Error]

bit 5 -

Reserved

bit 6

oL1 [Motor Overload]

bit 8

qAL1 [Q2pack Alarm]

00C9

bit 7

oL2 [Drive Overload]

bit 9

qAL2 [Q2pack Alarm 2]

bit 8

Reserved

bit A

qAL3 [Q2pack Alarm 3]

bit 9

EF0 [Option Card External Fault]

bit B -

Reserved

bit A

rUn [Motor Switch during Run]

00CD - 00CF

Reserved

bit B

Reserved

CPF Contents 1

bit C

CALL [Serial Comm Transmission Error]

bit 0 -

bit D

UL3 [Undertorque Detection 1]

Reserved

bit E

UL4 [Undertorque Detection 2]

bit 2

CPF02 [Control Circuit Fault]

bit F

SE [Modbus Test Mode Error]

bit 3

CPF03 [Control Circuit Fault]

Minor Fault Description 4

bit 4 -

Reserved

bit 0

Reserved

bit 6

CPF06 [Control Circuit Fault]

bit 1

oH3 [Motor Overheat (PTC Input)]

bit 7

Reserved

bit 2 -

00D0

Reserved

bit 8

CPF08 [Control Circuit Fault]

00CA

bit 6

FbL [PID Feedback Loss]

bit 9 -

Reserved

bit 7

FbH [Excessive PID Feedback]

bit B

CPF11 [Control Circuit Fault]

bit 8

Reserved

bit C

CPF12 [Control Circuit Fault]

bit 9

dnE [Drive Disabled]

bit D

CPF13 [Control Circuit Fault]

bit A -

Reserved

bit E

CPF14 [Control Circuit Fault]

Minor Fault Description 5

bit F

Reserved

bit 0

Reserved

CPF Contents 2

bit 1

AEr [Station Address Setting Error]

bit 0

CPF16 [Control Circuit Fault]

bit 2

CyC [MECHATROLINK CommCycleSettingErr]

bit 1

CPF17 [Control Circuit Fault]

bit 3

HCA [High Current Alarm]

bit 2

CPF18 [Control Circuit Fault]

bit 4

LT-1 [Cooling Fan Maintenance Time]

bit 3

CPF19 [Control Circuit Fault]

bit 5

LT-2 [Capacitor Maintenance Time]

bit 4

CPF20 [Control Circuit Fault]

00D1

bit 6 -

Reserved

bit 5

CPF21 [Control Circuit Fault]

00CB

bit 6

CPF22 [Control Circuit Fault]

bit 8

EF1 [External Fault (Terminal DI1)]

bit 7

CPF23 [Control Circuit Fault]

bit 9

EF2 [External Fault (Terminal DI2)]

bit 8

CPF24 [Control Circuit Fault]

bit A

SToF [Safe Torque OFF Hardware]

bit 9 -

bit B

Reserved

bit C

oL5 [Mechanical Weakening Detection 1]

CPF Contents 3

bit D

UL5 [Mechanical Weakening Detection 2]

bit 0- 5

Reserved

bit E -

00D2

Reserved

bit 6

CPF38 [EEPROM Data Error]

bit 7 -

Reserved

00D3 - 00D7

Reserved

207

6.3 Modbus Communications

Description

oFA0x Description (CN5-A)

00DC - 00E4

Reserved

bit 0

oFA00 [Option Not Compatible with Port]

Minor Fault Description 9

bit 1

oFA01 [Option Fault/Connection Error]

bit 0

EP24v [External Power 24V Supply]

bit 2 -

bit 1 -

Reserved

00D8

bit 5

oFA05 [Option A/D Error]

bit 4

bAT [Keypad Battery Low Voltage]

bit 6

oFA06 [Option Communication Error]

bit 5

Reserved

00E5

bit 7 -

bit 6

CP1 [Comparator 1 Limit Fault]

Reserved

bit 7

CP2 [Comparator 2 Limit Fault]

oFA1x Description (CN5-A)

bit 8

TiM [Keypad Time Not Set]

bit 0

oFA10 [Option RAM Error]

bit 9

bCE [Bluetooth Communication Error]

bit 1

oFA11 [Option Ope Mode Error]

bit A -

Reserved

bit 2

oFA12 [Drive Receive CRC Error]

bit 3

oFA13 [Drive Receive Frame Error]

00E6 - 00E9

Reserved

00D9

bit 4

oFA14 [Drive Receive Abort Error]

Fault Description 11

bit 5

oFA15 [Option Receive CRC Error]

bit 0

TiM [Keypad Time Not Set]

bit 6

oFA16 [Option Receive Frame Error]

bit 1

bAT [Keypad Battery Low Voltage]

00EA

bit 7

oFA17 [Option Receive Abort Error]

bit 2-

Reserved

bit 8 -

Reserved

bit E

SCF [Safety Circuit Fault]

00DA

Reserved

bit F

Reserved

oFA3x Description (CN5-A)

00EB - 00ED

Reserved

bit 0

oFA30 [COM ID Error]

Fault Description 12

bit 1

oFA31 [Type Code Error]

bit 0 -

Reserved

bit 2

oFA32 [SUM Check Error]

bit 3

CP1 [Comparator 1 Limit Fault]

bit 3

oFA33 [Option Receive Time Over]

00EE

bit 4

CP2 [Comparator 2 Limit Fault]

bit 4

oFA34 [Modbus Time Over]

bit 5

bCE [Bluetooth Communication Fault]

bit 5

oFA35 [Drive Receive Time Over 1]

bit 6 -

Reserved

bit 6

oFA36 [CI Check Error]

00DB

00EF - 00FA

Reserved

bit 7

oFA37 [Drive Receive Time Over 2]

Output Current

bit 8

oFA38 [Control Reference Error]

Note:

bit 9

oFA39 [Drive Receive Time Over 3]

00FB

The unit of display is different for different models.

2001 to 2042, B001 to B018, 4001 to 4023: 0.01 A

bit A

oFA40 [CtrlResSel 1Err]

2056 to 2082, 4031 to 4060: 0.1 A

bit B

oFA41 [Drive Receive Time Over 4]

bit C

oFA42 [CtrlResSel 2Err]

bit D

oFA43 [Drive Receive Time Over 5]

bit E -

Reserved

■ Broadcast Messages

Broadcast messages are available as read-only. The undefined bit signal in the broadcast operation signal uses the

local data signal.

208

6.3 Modbus Communications

Table 6.12 Broadcast Messages for Modbus Communication

Description

Operation signal

Fre

quency

0002

30000/100%

Run command

refer

bit 0

ence

1: Run, 0: Stop

Reverse run command

bit 1

1: Reverse, 0: Forward run

bit 2 -

Reserved

External fault

bit 4

1: EF0 [Option Card External Fault]

0001

Fault Reset

bit 5

1: Reset command

bit 6 -

Reserved

bit C

MFDI terminal DI5 input

bit D

MFDI terminal DI6 input

bit E

MFDI terminal DI7 input

bit F

Reserved

■ Fault Trace/Fault History Contents

These are the fault codes that the commands from monitors [U2-xx, U3-xx] read.

Table 6.13

Fault Trace/Fault History Contents

Fault Code (Hex.)

Name

Fault Code (Hex.)

Name

0002

Uv1 [DC Bus Undervoltage]

001F

Err [EEPROM Write Error]

0003

Uv2 [Control Power Undervoltage]

0020

oH4 [Motor Overheat Fault (PTC Input)]

0004

Uv3 [Soft Charge Answerback Fault]

0021

CE [Modbus Communication Error]

0005

SC [Short Circuit/IGBT Failure]

0022

bUS [Option Communication Error]

0006

GF [Ground Fault]

0025

CF [Control Fault]

0007

oC [Overcurrent]

0027

EF0 [Option Card External Fault]

0008

ov [Overvoltage]

0028

FbL [PID Feedback Loss]

0009

oH [Heatsink Overheat]

0029

UL3 [Undertorque Detection 1]

000A

oH1 [Heatsink Overheat]

002A

UL4 [Undertorque Detection 2]

000B

oL1 [Motor Overload]

002B

oL7 [High Slip Braking Overload]

000C

oL2 [Drive Overload]

0030

Includes oFx Fault [Hardware Fault]

000D

oL3 [Overtorque Detection 1]

0036

LF2 [Output Current Imbalance]

000E

oL4 [Overtorque Detection 2]

0037

STPo [Motor Step-Out Detected]

000F

rr [Dynamic Braking Transistor Fault]

003B

SEr [Speed Search Retries Exceeded]

0010

rH [Braking Resistor Overheat]

0041

FbH [Excessive PID Feedback]

0011

EF3 [External Fault (Terminal DI3)]

0042

EF1 [External Fault (Terminal DI1)]

0012

EF4 [External Fault (Terminal DI4)]

0043

EF2 [External Fault (Terminal DI2)]

0013

EF5 [External Fault (Terminal DI5)]

0044

oL5 [Mechanical Weakening Detection 1]

0014

EF6 [External Fault (Terminal DI6)]

0045

UL5 [Mechanical Weakening Detection 2]

0015

EF7 [External Fault (Terminal DI7)]

0046

CoF [Current Offset Fault]

0018

oS [Overspeed]

0049

qFL [Q2pack Fault]

0019

dEv [Speed Deviation]

004A

qFL1 [EEPROM Memory Q2pack Data Error]

001A

PGo [Encoder (PG) Feedback Loss]

004B

qFL2 [Q2pack Fault 2]

001B

PF [Input Phase Loss]

004C

qFL3 [Q2pack Fault 3]

001C

LF [Output Phase Loss]

004E

rF [Braking Resistor Fault]

001D

oH3 [Motor Overheat (PTC Input)]

004F

boL [BrakingTransistor Overload Fault]

209

6.3 Modbus Communications

Fault Code (Hex.)

Name

Fault Code (Hex.)

Name

0051

LSo [Low Speed Motor Step-Out]

0114

oFA13 [Drive Receive Frame Error]

0052

nSE [Node Setup Error]

0115

oFA14 [Drive Receive Abort Error]

005B

dv7 [Polarity Judge Timeout]

0116

oFA15 [Option Receive CRC Error]

0083

CPF02 [A/D Conversion Error]

0117

oFA16 [Option Receive Frame Error]

0084

CPF03 [Control Board Connection Error]

0118

oFA17 [Option Receive Abort Error]

0087

CPF06 [EEPROM Memory Data Error]

0131

oFA30 [COM ID Error]

0089

CPF08 [Terminal Board Connection Error]

0132

oFA31 [Type Code Error]

008C

CPF11 [RAM Fault]

0133

oFA32 [SUM Check Error]

008D

CPF12 [FLASH Memory Fault]

0134

oFA33 [Option Receive Time Over]

008E

CPF13 [Watchdog Circuit Exception]

0135

oFA34 [Modbus Time Over]

008F

CPF14 [Control Circuit Fault]

0136

oFA35 [Drive Receive Time Over 1]

0091

CPF16 [Clock Fault]

0137

oFA36 [CI Check Error]

0092

CPF17 [Timing Fault]

0138

oFA37 [Drive Receive Time Over 2]

0093

CPF18 [Control Circuit Fault]

0139

oFA38 [Control Reference Error]

0094

CPF19 [Control Circuit Fault]

013A

oFA39 [Drive Receive Time Over 3]

0095

CPF20 [Control Circuit Error]

013B

oFA40 [CtrlResSel 1Err]

0096

CPF21 [Control Circuit Error]

013C

oFA41 [Drive Receive Time Over 4]

0097

CPF22 [Hybrid IC Error]

013D

oFA42 [CtrlResSel 2Err]

0098

CPF23 [Control Board Connection Error]

013E

oFA43 [Drive Receive Time Over 5]

0099

CPF24 [Drive Unit Signal Fault]

0401

TiM [Keypad Time Not Set]

00A7

CPF38 [EEPROM Data Error]

0402

bAT [Keypad Battery Low Voltage]

0101

oFA00 [Option Not Compatible with Port]

040F

SCF [Safety Circuit Fault]

0102

oFA01 [Option Fault/Connection Error]

0414

CP1 [Comparator 1 Limit Fault]

0106

oFA05 [Option A/D Error]

0415

CP2 [Comparator 2 Limit Fault]

0107

oFA06 [Option Communication Error]

0416

bCE [Bluetooth Communication Fault]

0111

oFA10 [Option RAM Error]

041A

dCE1 [Communication Error1]

0112

oFA11 [Option Ope Mode Error]

041B

dCE2 [Communication Error2]

0113

oFA12 [Drive Receive CRC Error]

■ Minor Fault/Alarm Contents

These are the minor fault/alarm codes that communications register (007F (Hex.)) reads.

Table 6.14 Minor Fault/Alarm Contents (007 (Hex.))

Minor Fault/Alarm

Name

Code (Hex.)

0001

Uv [Undervoltage]

0010

oS [Overspeed]

0002

ov [Overvoltage]

0011

dEv [Speed Deviation]

0003

oH [Heatsink Overheat]

0012

PGo [Encoder (PG) Feedback Loss]

0004

Overheat Alarm (oH2)

0014

CE [Modbus Communication Error]

0005

oL3 [Overtorque 1]

0015

bUS [Option Communication Error]

0006

oL4 [Overtorque 2]

0016

CALL [Serial Comm Transmission Error]

0007

EF [FWD/REV Run Command Input Error]

0017

oL1 [Motor Overloaded]

0008

bb [Baseblock]

0018

oL2 [Drive Overloaded]

0009

EF3 [External Fault (Terminal DI3)]

001A

EF0 [Option Card External Fault]

000A

EF4 [External Fault (Terminal DI4)]

001B

rUn [Motor Switch during Run]

000B

EF5 [External Fault (Terminal DI5)]

001D

CALL [Serial Comm Transmission Error]

000C

EF6 [External Fault (Terminal DI6)]

001E

UL3 [Undertorque Detection 1]

000D

EF7 [External Fault (Terminal DI7)]

001F

UL4 [Undertorque Detection 2]

210

6.3 Modbus Communications

Minor Fault/Alarm

Name

Code (Hex.)

0020

SE [Modbus Test Mode Error]

003E

UL5 [Mechanical Weakening Detection 2]

0021

L24v [Loss of External Power 24 Supply]

0042

TrPC [IGBT Maintenance Time (90%)]

0022

oH3 [Motor Overheat (PTC Input)]

0043

LT-3 [SoftChargeBypassRelay MainteTime]

0027

FbL [PID Feedback Loss]

0044

LT-4 [IGBT Maintenance Time (50%)]

0028

FbH [Excessive PID Feedback]

0045

boL [Braking Transistor Overload]

002A

dnE [Drive Disabled]

0049

qAL1 [Q2pack Alarm]

0032

AEr [Station Address Setting Error]

004A

qAL2 [Q2pack Alarm 2]

0033

CyC [MECHATROLINK CommCycleSettingErr]

004B

qAL3 [Q2pack Alarm 3]

0034

HCA [High Current Alarm]

0081

EP24v [External Power 24V Supply]

0035

LT-1 [Cooling Fan Maintenance Time]

0085

bAT [Keypad Battery Low Voltage]

0036

LT-2 [Capacitor Maintenance Time]

0087

CP1 [Comparator 1 Limit Error]

0039

EF1 [External Fault (Terminal DI1)]

0088

CP2 [Comparator 2 Limit Error]

003A

EF2 [External Fault (Terminal DI2)]

0089

TiM [Keypad Time Not Set]

003B

SToF [Safe Torque OFF Hardware]

008A

bCE [Bluetooth Communication Error]

003D

oL5 [Mechanical Weakening Detection 1]

◆ Error Codes

■ Modbus Communications Error Code List

This table lists the Modbus communications error codes.

When an error occurs, remove the cause of the error and restart communications.

Table 6.15 Modbus Communications Error Codes

Error Code

Name

Cause

(Hex.)

Function Code Error

The PLC set a function code that was not 03, 08, or 10 (Hex.)

• The register number that is trying to access is not registered.

• A starting number that was not 0001 or 0002 (Hex.) was set when broadcasting.

• Read and write data quantities are more than the 1 to 16 range. (Command message data quantity is disabled.)

• The data that was read from non-consecutive holding registers contained more than 120 bytes.

Bit Count Error

• The data to be written to non-consecutive holding registers contained more than 60 bytes.

• In the write mode, the number of bytes in the message is not the number of data × 2.

• Writing control data or parameters made the settings go out of the permitted setting range.

Data Setting Error

• A parameter setting error occurred when writing a parameter.

• Tried to write a disabled parameter during run.

• When there was a CPF06 [Control Circuit Error], the master tried to write a parameter other than one of these:

- A1-00 [Language Selection]

- A1-01 [Access Level]

- A1-02 [Control Method]

Write Mode Error

- A1-03 [Init Parameters]

- A1-04 [Password Input]

- A1-05 [Password Setting]

- E1-03 [V/f Pattern Selection]

- o2-04 [Drive KVA Selection]

• Writes the read-only data.

DC Bus Undervoltage

During Uv [DC Bus Undervoltage], a Uv write disabled parameter was written.

Write Error

Error Writing Data During

Tried to write a parameter from the master during parameter processing on the drive side.

Parameter Processing

Writing into EEPROM

Writing into EEPROM write is disabled, but EEPROM write was executed from Modbus communications. When this error

Disabled

occurs, the keypad shows a message and the drive continues operation.

211

6.3 Modbus Communications

■ No Response from Slave

The slave ignores the command message from the master and will not send a response message in these

conditions:

• When a communications error (overrun, framing, parity, CRC-16) is detected in the command message.

• When the slave address in the command message and the slave address for the drive side do not agree (Use H5-

01 [Mbus Address] to set the slave address of the drive)

• When the time interval between the data of which the message is composed is longer than 24 bits

• When the data length for the command message is not accurate

Note:

• If the keypad shows CALL [Serial Comm Transmission Error], refer to “Troubleshooting” to remove the cause of the error, and try to

do communications again. If the keypad does not show CALL, check U1-19 [Modbus Err.Code] for the error and error type.

• If you execute the write function code when the slave address in the command message is 00 (Hex.), all of the slaves will execute the

write command, but they will not send response messages to the master.

212

7.1 Safety Precautions

7.1

Safety Precautions

DANGER

Electrical Shock Hazard

Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,

disconnect all power to the equipment and wait for the time specified on the warning label at a

minimum. The internal capacitor stays charged after the drive is de-energized. The charge

indicator LED extinguishes when the DC bus voltage decreases below 50 Vdc. When all

indicators are OFF, measure for dangerous voltages to make sure that the drive is safe.

If you do work on the drive when it is energized, it will cause serious injury or death from electrical shock. The

drive has internal capacitors that stay charged after you de-energize the drive.

WARNING

Electrical Shock Hazard

Do not operate the drive when covers are missing. Replace covers and shields before you

operate the drive. Use the drive only as specified by the instructions.

Some figures in this section include drives without covers or safety shields to more clearly show the inside of the

drive. If covers or safety shields are missing from the drive, it can cause serous injury or death.

Always ground the motor-side grounding terminal.

If you do not ground the equipment correctly, it can cause serious injury or death if you touch the motor case.

After the drive blows a fuse or trips an RCM/RCD, do not immediately energize the drive or

operate peripheral devices. Wait for the time specified on the warning label at a minimum and

make sure that all indicators are OFF. Then check the wiring and peripheral device ratings to

find the cause of the problem. If you do not know the cause of the problem, contact the

manufacturer before you energize the drive or peripheral devices.

If you do not fix the problem before you operate the drive or peripheral devices, it can cause serious injury or

death.

Only let approved personnel install, wire, maintain, examine, replace parts, and repair the drive.

If personnel are not approved, it can cause serious injury or death.

Do not wear loose clothing or jewelry when you do work on the drive. Tighten loose clothing

and remove all metal objects, for example watches or rings.

Loose clothing can catch on the drive and jewelry can conduct electricity and cause serious injury or death.

Do not remove covers or touch circuit boards while the drive is energized.

If you touch the internal components of an energized drive, it can cause serious injury or death.

Do not modify the drive body or drive circuitry.

Modifications to drive body and circuitry can cause serious injury or death, will cause damage to the drive, and

will void the warranty. The manufacturer is not responsible for modifications of the product made by the user.

Fire Hazard

Tighten all terminal screws to the correct tightening torque.

Connections that are too loose or too tight can cause incorrect operation and damage to the drive. Incorrect

connections can also cause death or serious injury from fire.

Tighten screws at an angle in the specified range shown in this manual.

If you tighten the screws at an angle not in the specified range, you can have loose connections that can cause

damage to the terminal block or start a fire and cause serious injury or death.

Do not use the main circuit power supply (Overvoltage Category III) at incorrect voltages.

Operate the drive in the specification range of the input voltage on the drive nameplate.

Voltages that are higher than the permitted nameplate tolerance can cause damage to the drive.

Do not put flammable or combustible materials on top of the drive and do not install the drive

near flammable or combustible materials. Attach the drive to metal or other noncombustible

material.

Flammable and combustible materials can start a fire and cause serious injury or death.

214

7.1 Safety Precautions

WARNING

Crush Hazard

Wear eye protection when you do work on the drive.

If you do not use correct safety equipment, it can cause serious injury or death.

Use a crane or hoist to move large drives when necessary.

If you try to move a large drive without a crane or hoist, it can cause serious injury or death.

NOTICE

When you touch the drive and circuit boards, make sure that you observe correct electrostatic

discharge (ESD) procedures.

If you do not follow procedures, it can cause ESD damage to the drive circuitry.

Do not break the electrical connection between the drive and the motor when the drive is

outputting voltage.

Incorrect equipment sequencing can cause damage to the drive.

Make sure that all connections are correct after you install the drive and connect peripheral

devices.

Incorrect connections can cause damage to the drive.

Note:

Do not use unshielded wire for control wiring. Use shielded, twisted-pair wires and ground the shield to the ground terminal of the drive.

Unshielded wire can cause electrical interference and unsatisfactory system performance.

215

7.2 Types of Faults, Minor Faults, Alarms, and Errors

7.2

Types of Faults, Minor Faults, Alarms, and Errors

If the drive or motor do not operate correctly, check the drive keypad for a code or message.

If problems occur that are not identified in this manual, contact the nearest manufacturer's representative with this

information:

• Drive model

• Drive software version

• Date of purchase

• Description of the problem (such as failure conditions)

Contact the manufacturer if there is damage to the drive. Contact information is on the back cover of the manual.

Table 7.1 Types of Faults, Minor Faults, Alarms, and Errors

Type

Drive Response

When the drive detects a fault, it will cause these conditions:

• The keypad shows the fault code, and the ALM LED stays illuminated.

Fault

• The drive shuts off output, and the motor coasts to a stop. Some faults let the user select a motor stopping method.

• The terminal set to H2-01 to H2-03 = 3 [MFDO Function Select = Fault] will activate.

The drive will not operate until you clear the fault with a Fault Reset and the drive goes back to usual status.

When the drive detects a minor fault or an alarm, it will cause these conditions:

• The keypad shows the alarm code, and the ALM LED flashes.

• The drive will continue to operate the motor. Some alarms let the user select a motor stopping method.

Minor Faults/Alarms

• If the drive detects a minor fault, the terminal set to H2-01 to H2-03 = 4 [Alarm] will activate. If you do not set parameters H2-01 to H2-03, the

drive will not trigger MFDO terminals when it detects a minor fault.

• The drive will not output a minor fault signal when it detects an alarm.

It is not necessary to do Fault Reset.

An error occurs when parameter settings do not agree or a parameter combination is incorrect. The drive will not operate until you set the

parameters correctly.

When the drive detects an operation error, these conditions will result:

Operation Errors

• The keypad shows the error code.

• Multi-function outputs do not output an alarm signal.

Find the parameters that caused the error and correct the settings.

An error occurs during Auto-Tuning.

When the drive detects a tuning error, it will cause these conditions:

• The keypad shows the error code.

An Auto-Tuning Error

• Multi-function outputs do not output an alarm signal.

• The motor coasts to stop.

Remove the cause of the error and do Auto-Tuning again.

An error occurs when you use the keypad for a backup, restore, or verify operation.

When the drive detects a copy function error, it will cause these conditions:

Copy Function Error

• The keypad shows the error code.

• Multi-function outputs do not output an alarm signal.

Push a key on the keypad to clear the error. Remove the cause of the error and try the backup, restore, or verify operation again.

216

7.3 List of Fault, Minor Fault, Alarm, and Error Codes

7.3

List of Fault, Minor Fault, Alarm, and Error Codes

The display codes are in alphabetical order. Search the table for the code shown on the keypad, and identify its

causes and possible solutions.

Note:

The number in parentheses adjacent to the code in the table identifies the fault code or minor fault code (hex. number) that was read

during Modbus communications.

Example: AEr (0032)

Table 7.2 List of Fault, Minor Fault, Alarm, and Error Codes

Display (Hex.)

Name

ALM LED

Type

Ref.

AEr (0032)

Station Address Setting Error

Flashing

Alarm

238

bAT (0085)

Keypad Battery Low Voltage

Flashing

Alarm

238

bAT (0402)

Keypad Battery Low Voltage

Illuminated

Fault

222

bb (0008)

Baseblock

Flashing

Alarm

238

bCE (008A)

Bluetooth Communication Error

Flashing

Alarm

238

bCE (0416)

Bluetooth Communication Fault

Illuminated

Fault

222

boL (0045)

Braking Transistor Overload

Flashing

Alarm

238

boL (004F)

BrakingTransistor Overload Fault

Illuminated

Fault

222

bUS (0015)

Option Communication Error

Flashing

Alarm

238

bUS (0022)

Option Communication Error

Illuminated

Fault

222

CALL (001D)

Serial Comm Transmission Error

Flashing

Alarm

239

CE (0014)

Modbus Communication Error

Flashing

Alarm

239

CE (0021)

Modbus Communication Error

Illuminated

Fault

222

CF (0025)

Control Fault

Illuminated

Fault

223

CoF (0046)

Current Offset Fault

Illuminated

Fault

223

CP1 (0087)

Comparator 1 Limit Error

Flashing

Alarm

239

CP1 (0414)

Comparator 1 Limit Error

Illuminated

Fault

223

CP2 (0088)

Comparator 2 Limit Error

Flashing

Alarm

239

CP2 (0415)

Comparator 2 Limit Error

Illuminated

Fault

223

CPEr

Control Mode Mismatch

Backup Function Error

255

CPF00, CPF01

CPF02, CPF03 (0083, 0084)

CPF08 (0089)

Control Circuit Error

Illuminated

Fault

224

CPF11 - CPF14 (008C - 008F)

CPF16 - CPF24 (0091 - 0099)

CPF38 (00A7)

CPF06 (0087)

EEPROM Memory Data Error

Illuminated

Fault

224

CPyE

Error Writing Data

Backup Function Error

255

CrST

Remove RUN Command to Reset

Flashing

Not an alarm.

239

CSEr

Control Mode Mismatch

Backup Function Error

255

CyC (0033)

MECHATROLINK CommCycleSettingErr

Flashing

Alarm

240

CyPo (0029)

Cycle Power to Accept Changes

Flashing

Alarm

240

dCE1 (041A)

Communication Error1

Illuminated

Fault

224

dCE2 (041B)

Communication Error2

Illuminated

Fault

224

dEv (0011)

Speed Deviation

Flashing

Alarm

240

dEv (0019)

Speed Deviation

Illuminated

Fault

224

dFPS

Drive Model Mismatch

Backup Function Error

255

dnE (002A)

Drive Disabled

Flashing

Alarm

240

dv7 (005B)

Polarity Judge Timeout

Illuminated

Fault

224

E5 (0031)

MECHATROLINK Watchdog Timer Err

Flashing

Alarm

240

217

7.3 List of Fault, Minor Fault, Alarm, and Error Codes

Display (Hex.)

Name

ALM LED

Type

Ref.

E5 (0039)

MECHATROLINK Watchdog Timer Err

Illuminated

Fault

225

EF (0007)

FWD/REV Run Command Input Error

Flashing

Alarm

240

EF0 (001A)

Option Card External Fault

Flashing

Alarm

241

EF0 (0027)

Option Card External Fault

Illuminated

Fault

225

EF1 (0042)

External Fault (Terminal DI1)

Illuminated

Fault

225

EF1 (0039)

External Fault (Terminal DI1)

Flashing

Alarm

241

EF2 (003A)

External Fault (Terminal DI2)

Flashing

Alarm

241

EF2 (0043)

External Fault (Terminal DI2)

Illuminated

Fault

225

EF3 (0009)

External Fault (Terminal DI3)

Flashing

Alarm

241

EF3 (0011)

External Fault (Terminal DI3)

Illuminated

Fault

226

EF4 (000A)

External Fault (Terminal DI4)

Flashing

Alarm

241

EF4 (0012)

External Fault (Terminal DI4)

Illuminated

Fault

226

EF5 (000B)

External Fault (Terminal DI5)

Flashing

Alarm

241

EF5 (0013)

External Fault (Terminal DI5)

Illuminated

Fault

226

EF6 (000C)

External Fault (Terminal DI6)

Flashing

Alarm

241

EF6 (0014)

External Fault (Terminal DI6)

Illuminated

Fault

226

EF7 (000D)

External Fault (Terminal DI7)

Flashing

Alarm

242

EF7 (0015)

External Fault (Terminal DI7)

Illuminated

Fault

226

End1

Excessive Rated Voltage Setting

Flashing

Auto-Tuning Error

251

End2

Iron Core Saturation Coefficient

Flashing

Auto-Tuning Error

251

End3

Rated Current Setting Alarm

Flashing

Auto-Tuning Error

251

End4

Adjusted Slip Calculation Error

Flashing

Auto-Tuning Error

251

End5

Resistance Tuning Error

Flashing

Auto-Tuning Error

251

End6

Leakage Inductance Alarm

Flashing

Auto-Tuning Error

251

End7

No-Load Current Alarm

Flashing

Auto-Tuning Error

251

End8

HFI Alarm

Flashing

Auto-Tuning Error

251

End9

Initial Pole Detection Alarm

Flashing

Auto-Tuning Error

252

EP24v (0081)

External Power 24V Supply

Flashing

Alarm

242

Er-01

Motor Data Error

Flashing

Auto-Tuning Error

252

Er-02

Drive in an Alarm State

Flashing

Auto-Tuning Error

252

Er-03

STOP Button was Pressed

Flashing

Auto-Tuning Error

252

Er-04

Line-to-Line Resistance Error

Flashing

Auto-Tuning Error

252

Er-05

No-Load Current Error

Flashing

Auto-Tuning Error

252

Er-08

Rated Slip Error

Flashing

Auto-Tuning Error

253

Er-09

Acceleration Error

Flashing

Auto-Tuning Error

253

Er-10

Motor Direction Error

Flashing

Auto-Tuning Error

253

Er-11

Motor Speed Error

Flashing

Auto-Tuning Error

253

Er-12

Current Detection Error

Flashing

Auto-Tuning Error

253

Er-13

Leakage Inductance Error

Flashing

Auto-Tuning Error

253

Er-14

Motor Speed Error 2

Flashing

Auto-Tuning Error

253

Er-15

Torque Saturation Error

Flashing

Auto-Tuning Error

253

Er-16

Inertia ID Error

Flashing

Auto-Tuning Error

254

Er-17

Reverse Prohibited Error

Flashing

Auto-Tuning Error

254

Er-18

Back EMF Error

Flashing

Auto-Tuning Error

254

Er-19

PM Inductance Error

Flashing

Auto-Tuning Error

254

Er-20

Stator Resistance Error

Flashing

Auto-Tuning Error

254

218

7.3

List of Fault, Minor Fault, Alarm, and Error Codes

Display (Hex.)

Name

ALM LED

Type

Ref.

Er-25

HighFreq Inject Param Tuning Err

Flashing

Auto-Tuning Error

254

Err (001F)

EEPROM Write Error

Illuminated

Fault

226

FbH (0028)

Excessive PID Feedback

Flashing

Alarm

242

FbH (0041)

Excessive PID Feedback

Illuminated

Fault

226

FbL (0027)

PID Feedback Loss

Flashing

Alarm

242

FbL (0028)

PID Feedback Loss

Illuminated

Fault

227

GF (0006)

Ground Fault

Illuminated

Fault

227

HCA (0034)

High Current Alarm

Flashing

Alarm

242

iFEr

Communication Err

Backup Function Error

255

L24v (0021)

Loss of External Power 24 V Supply

Flashing

Alarm

242

LF (001C)

Output Phase Loss

Illuminated

Fault

227

LF2 (0036)

Output Current Imbalance

Illuminated

Fault

227

LoG

Log Com Error

Flashing

Alarm

243

LSo (0051)

Low Speed Motor Step-Out

Illuminated

Fault

228

LT-1 (0035)

Cooling Fan Maintenance Time

Flashing

Alarm

243

LT-2 (0036)

Capacitor Maintenance Time

Flashing

Alarm

243

LT-3 (0043)

SoftChargeBypassRelay MainteTime

Flashing

Alarm

243

LT-4 (0044)

IGBT Maintenance Time (50%)

Flashing

Alarm

243

ndAT

Model,VolClass,Capacity Mismatch

Backup Function Error

255

nSE (0052)

Node Setup Error

Illuminated

Fault

228

oC (0007)

Overcurrent

Illuminated

Fault

228

oFA00 (0101)

Option Not Compatible with Port

Illuminated

Fault

229

oFA03 - oFA06 (0104 - 0107)

Option Card Error Occurred at Option Port (CN5)

Illuminated

Fault

229

oFA10, oFA11 (0111, 0112)

Option Card Error Occurred at Option Port (CN5)

Illuminated

Fault

229

oFA12 - oFA17 (0113 - 0118)

Option Card Connection Error (CN5)

Illuminated

Fault

230

oFA30 - oFA43 (0131 - 013E)

Communication Option Card Connection Error (CN5)

Illuminated

Fault

230

oH (0003)

Heatsink Overheat

Flashing

Alarm

243

oH (0009)

Heatsink Overheat

Illuminated

Fault

230

oH1 (000A)

Heatsink Overheat

Illuminated

Fault

230

oH2 (0004)

External Overheat (H1-XX=7D)

Flashing

Alarm

243

oH3 (001D)

Motor Overheat (PTC Input)

Illuminated

Fault

230

oH3 (0022)

Motor Overheat (PTC Input)

Flashing

Alarm

243

oH4 (0020)

Motor Overheat Fault (PTC Input)

Illuminated

Fault

231

oL1 (000B)

Motor Overload

Illuminated

Fault

231

oL2 (000C)

Drive Overload

Illuminated

Fault

232

oL3 (0005)

Overtorque 1

Flashing

Alarm

244

oL3 (000D)

Overtorque Detection 1

Illuminated

Fault

232

oL4 (0006)

Overtorque 2

Flashing

Alarm

244

oL4 (000E)

Overtorque Detection 2

Illuminated

Fault

232

oL5 (003D)

Mechanical Weakening Detection 1

Flashing

Alarm

244

oL5 (0044)

Mechanical Weakening Detection 1

Illuminated

Fault

232

oL7 (002B)

High Slip Braking Overload

Illuminated

Fault

233

oPE01

Drive Capacity Setting Fault

Flashing

Parameter Setting Errors

247

oPE02

Parameter Range Setting Error

Flashing

Parameter Setting Errors

247

oPE03

Multi-Function Input Setting Err

Flashing

Parameter Setting Errors

247

oPE05

Run Cmd/Freq Ref Source Sel Err

Flashing

Parameter Setting Errors

248

219

7.3 List of Fault, Minor Fault, Alarm, and Error Codes

Display (Hex.)

Name

ALM LED

Type

Ref.

oPE07

Analog Input Selection Error

Flashing

Parameter Setting Errors

248

oPE08

Parameter Selection Error

Flashing

Parameter Setting Errors

249

oPE09

PID Control Selection Fault

Flashing

Parameter Setting Errors

249

oPE10

V/f Data Setting Error

Flashing

Parameter Setting Errors

250

oPE11

Carrier Frequency Setting Error

Flashing

Parameter Setting Errors

250

oPE13

Pulse Monitor Selection Error

Flashing

Parameter Setting Errors

250

oPE16

Energy Saving Constants Error

Flashing

Parameter Setting Errors

250

oPE33

Digital Output Selection Error

Flashing

Parameter Setting Errors

250

oPr (001E)

Keypad Connection Fault

Illuminated

Fault

233

oS (0010)

Overspeed

Flashing

Alarm

244

oS (0018)

Overspeed

Illuminated

Fault

244

ov (0002)

Overvoltage

Flashing

Alarm

244

ov (0008)

Overvoltage

Illuminated

Fault

233

PASS

Modbus Communication Test

Flashing

Not an alarm.

245

PE1 (0047)

PLC Faults

Illuminated

Fault

234

PE2 (0048)

PF (0047)

Input Phase Loss

Flashing

Alarm

245

PF (001B)

Input Phase Loss

Illuminated

Fault

234

PWEr

Q2pack Password Mismatch

Backup Function Error

255

qAL1 (0049)

Q2pack Alarm

Flashing

Alarm

240

qAL2 (004A)

Q2pack Alarm 2

Flashing

Alarm

240

qAL3 (004B)

Q2pack Alarm 3

Flashing

Alarm

240

qFL1 (004A)

EEPROM Memory Q2pack Data Error

Illuminated

Fault

225

qFL2 (004B)

Q2pack Fault 2

Illuminated

Fault

225

qFL3 (004C)

Q2pack Fault 3

Illuminated

Fault

225

qFL (0049)

Q2pack Fault

Illuminated

Fault

225

rdEr

Error Reading Data

Backup Function Error

255

rF (004E)

Braking Resistor Fault

Illuminated

Fault

234

rH (0010)

Braking Resistor Overheat

Illuminated

Fault

235

rr (000F)

Dynamic Braking Transistor Fault

Illuminated

Fault

235

rUn (001B)

Motor Switch during Run

Flashing

Alarm

245

SC (0005)

Short Circuit/IGBT Failure

Illuminated

Fault

235

SCF (040F)

Safety Circuit Fault

Illuminated

Fault

235

SE (0020)

Modbus Test Mode Error

Flashing

Alarm

245

SEr (003B)

Speed Search Retries Exceeded

Illuminated

Fault

235

SToF (003B)

Safe Torque OFF

Flashing

Alarm

245

STPo (0037)

Motor Step-Out Detected

Illuminated

Fault

236

TiM (0089)

Keypad Time Not Set

Flashing

Alarm

246

TiM (0401)

Keypad Time Not Set

Illuminated

Fault

236

TrPC (0042)

IGBT Maintenance Time (90%)

Flashing

Alarm

246

UL3 (001E)

Undertorque Detection 1

Flashing

Alarm

246

UL3 (0029)

Undertorque Detection 1

Illuminated

Fault

236

UL4 (001F)

Undertorque Detection 2

Flashing

Alarm

246

UL4 (002A)

Undertorque Detection 2

Illuminated

Fault

236

UL5 (003E)

Mechanical Weakening Detection 2

Flashing

Alarm

246

UL5 (0045)

Mechanical Weakening Detection 2

Illuminated

Fault

236

Uv (0001)

DC Bus Undervoltage

Flashing

Alarm

246

220

7.4 Faults

7.4

Faults

This section gives information about the causes and possible solutions of faults. You must use the Fault Reset

operation to remove the fault before you can operate the drive. Use the information in this table to remove the

cause of the fault.

Code

Name

Causes

Possible Solutions

bAT

Keypad Battery Low Voltage

The keypad battery voltage is low.

Replace the keypad battery.

Note:

Use o4-24 [bAT Detection Selection] to enable/disable bAT detection.

Code

Name

Causes

Possible Solutions

bCE

Bluetooth Communication Fault

The smartphone or tablet with Q2dev Mobile

Use the smartphone or tablet 10 m (32.8 ft) or nearer to the

installed is too far from the keypad.

keypad.

Note:

bCE can occur when the smartphone or tablet is 10 m (32.8 ft)

or nearer to the keypad depending on the specifications of the

smartphone or tablet.

Radio waves from a different device are causing

Make sure that no device around the keypad uses the same radio

interference with communications between the

bandwidth (2400 MHz to 2480 MHz), and prevent radio

smartphone or tablet and keypad.

interference.

Note:

• The drive detects this error when you use the Bluetooth LCD keypad and operate the drive with a smartphone or tablet.

• Do a Fault Reset to clear the fault.

• Set the stopping method for this fault in o2-27 [BLE Disconn.Selection@BLE Ctrl].

Code

Name

Causes

Possible Solutions

boL

BrakingTransistor Overload Fault

The duty cycle of the braking transistor is high (the

• Install a regenerative converter.

regeneration power or repetition frequency is high).

• Increase the deceleration time.

You enabled the protective function for the braking

Set L8-55 = 0 [DB IGBT Protection = Disable].

transistor when you have a regenerative converter.

The braking transistor in the drive is broken.

Replace the drive.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

bUS

Option Communication Error

The drive did not receive a signal from the

Correct wiring errors.

controller.

The communications cable wiring is incorrect.

There is a short-circuit in the communications cable

• Repair short circuits and connect cables.

or the communications cable is not connected.

• Replace the defective communications cable.

Electrical interference caused a communication data

• Examine the control circuit lines, main circuit lines, and

error.

ground wiring, and decrease the effects of electrical

interference.

• Make sure that a magnetic contactor is not the source of the

electrical interference, then use a Surge Protective Device if

necessary.

• Use only the recommended cables or other shielded line.

Ground the shield on the controller side or the drive input

power side.

• Separate the communication wiring from drive power lines,

and install a noise filter to the input side of the power supply

for communication.

• Decrease the effects of electrical interference from the

controller.

The option is incorrectly installed to the drive.

Correctly install the option to the drive.

The option is damaged.

If the fault continues and the wiring is correct, replace the option.

Note:

• The drive detects this error if the Run command or frequency reference is assigned to the option card.

• Do a Fault Reset to clear the fault.

• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in F6-01 [Comm.Error Selection].

Code

Name

Causes

Possible Solutions

Modbus Communication Error

The communications cable wiring is incorrect.

Correct wiring errors.

There is a short circuit in the communications cable

• Repair short circuits and connect cables.

or the communications cable is not connected.

• Replace the defective communications cable.

222

7.4 Faults

Code

Name

Causes

Possible Solutions

Electrical interference caused a communication data

• Examine the control circuit lines, main circuit lines, and

error.

ground wiring, and decrease the effects of electrical

interference.

• Make sure that a magnetic contactor is not the source of the

electrical interference, then use a Surge Protective Device if

necessary.

• Use only the recommended cables or other shielded line.

Ground the shield on the controller side or the drive input

power side.

• Separate the communication wiring from drive power lines,

and install a noise filter to the input side of the power supply

for communication.

• Decrease the effects of electrical interference from the

controller.

Note:

• The drive detects this error if it does not correctly receive control data for the CE detection time set to H5-09 [Mbus CE Detect Time].

• Do a Fault Reset to clear the fault.

• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in H5-04 [Mbus Error Stop].

Code

Name

Causes

Possible Solutions

Control Fault

Motor parameters are set incorrectly

Correctly set the motor parameters and do Auto-Tuning again.

The torque limit setting is too low.

Adjust L7-01 to L7-04 [Torque Limit].

The load inertia is too large.

• Adjust C1-02, C1-04, C1-06, and C1-08 [Deceleration Times].

• Set the frequency reference to the minimum output frequency,

and stop the Run command when the drive stops deceleration.

The drive is trying to ramp to stop a machine that

Correctly set b1-03 [Stopping Method Selection].

cannot do ramp to stop or on a machine for which

deceleration is not necessary.

The motor and drive are connected incorrectly.

Correct wiring errors.

Line-to-line Resistance Tuning is not done.

Do Stationary Auto-Tuning for Line-to-Line Resistance.

The drive received a Run command while the motor

• Examine the sequence and input the Run command after the

was coasting.

motor fully stops.

• Set b3-01 = 1 [SpSrch@Start Selection = Enabled].

Note:

• The drive detects this error if the torque reference is more than the torque limit for 3 seconds or longer while the drive ramps to stop.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

CoF

Current Offset Fault

The drive starts operation while the induced voltage

• Make a sequence that does not restart operation when induced

stays in the motor (during coasting to a stop or after

voltage stays in the motor.

fast deceleration).

• Set b3-01 = 1 [SpSrch@Start Selection = Enabled].

• Use Speed Search from Fmax or Fref [H1-xx = 67, 68] to do a

speed search through one of the external terminals.

Note:

When controlling the PM motor, External Speed Search

commands 1 and 2 operate the same.

A drive hardware problem occurred.

Replace the drive.

Note:

• The drive detects this error if the current offset value is more than the permitted setting range while the drive automatically adjusts the current offset.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

CP1

Comparator 1 Limit Error

The monitor value set in H2-20 [Compare1 Mon.

Examine the monitor value and remove the cause of the fault.

Selection] was in the range of H2-21 [Compare1

Low Limit] and H2-22 [Compare1 Up Limit].

Note:

• The drive detects this error when H2-01 to H2-03 = 3C [MFDO Function Select = Comparator 1].

• Do a Fault Reset to clear the fault.

• Set the stopping method for this fault in H2-33 [Compare1 Protection Selection].

Code

Name

Causes

Possible Solutions

CP2

Comparator 2 Limit Error

The monitor value set in H2-26 [Compare2 Mon.

Examine the monitor value and remove the cause of the fault.

Selection] was outside the range of H2-27

[Compare2 Low Limit] and H2-28 [Compare2 Up

Limit].

Note:

• The drive detects this error when H2-01 to H2-03 = 3D [MFDO Function Select = Comparator 2].

• Do a Fault Reset to clear the fault.

• Set the stopping method for this fault in H2-35 [Compare2 Protection Selection].

223

7.4 Faults

Code

Name

Causes

Possible Solutions

CPF00, CPF01,

Control Circuit Error

A drive hardware problem occurred.

• Re-energize the drive.

CPF02, CPF03,

• If the fault stays, replace the control board or the drive. For

CPF06, CPF08,

information about replacing the control board, contact the

CPF11 to

manufacturer or your nearest sales representative.

CPF14, CPF16

to CPF24,

CPF38

Note:

• Do a Fault Reset to clear the fault.

• Fault trace is not available for these faults.

Code

Name

Causes

Possible Solutions

CPF06

EEPROM Memory Data Error

The drive power supply was de-energized while a

Set A1-03 = 2220, 3330 [Init Parameters = 2-Wire Initialization,

communication option card entered a parameter

3-Wire Initialization] and initialize the drive.

Write command.

An EEPROM peripheral circuit error occurred.

• Re-energize the drive.

• If the fault stays, replace the control board or the drive. For

information about replacing the control board, contact the

manufacturer or your nearest sales representative.

Note:

• The drive detects this error if there is an error in the data written to the EEPROM of the drive.

• Do a Fault Reset to clear the fault.

• Fault trace is not available for this fault.

Code

Name

Causes

Possible Solutions

CPF25

Terminal Board not Connected

The terminal board is not correctly connected to the

De-energize the drive.

drive.

Correctly connect the terminal board to the drive.

Re-energize the drive.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

dCE1

Communication Error1

A drive hardware problem occurred temporarily due

• Remove the cause of the noise.

to noise.

• If the fault stays, replace the control board or the drive.

Note:

• Do a Fault Reset to clear the fault.

• Fault trace is not available for these faults.

Code

Name

Causes

Possible Solutions

dCE2

Communication Error2

A drive hardware problem occurred temporarily due

• Remove the cause of the noise.

to noise.

• If the fault stays, replace the control board or the drive.

Note:

• Do a Fault Reset to clear the fault.

• Fault trace is not available for these faults.

Code

Name

Causes

Possible Solutions

dEv

Speed Deviation

The load is too heavy.

Decrease the load.

Acceleration and deceleration times are set too

Increase the values set in C1-01 to C1-08 [Acceleration/

short.

Deceleration Time].

The dEv detection level settings are incorrect.

Adjust F1-10 [Speed Dev Level] and F1-11 [Speed Dev Delay

Time].

The load is locked up.

Examine the machine.

The holding brake is stopping the motor.

Release the holding brake.

Note:

• The drive detects this error if the difference between the detected speed and the speed reference is more than the setting of F1-10 for longer than F1-11.

• Do a Fault Reset to clear the fault.

• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in F1-04 [Speed Dev Detection Select].

Code

Name

Causes

Possible Solutions

dv7

Polarity Judge Timeout

There is a disconnection in the motor coil winding.

Measure the motor line-to-line resistance and replace the motor if

a coil is disconnected.

The screws on the drive output terminals are loose.

Tighten the terminal screws to the correct tightening torque.

Note:

• The drive detects this error if it cannot detect polarity in a pre-set length of time.

• Do a Fault Reset to clear the fault.

224

7.4 Faults

Code

Name

Causes

Possible Solutions

qFL1

EEPROM Memory Q2pack Data

There is an error in the EEPROM peripheral circuit.

• Re-energize the drive.

Error

• If the fault stays, replace the control board or the drive. For

information about replacing the control board, contact the

manufacturer or your nearest sales representative.

There is a problem with the EEPROM data.

Set A1-03 = 2220, 3330 [Init Parameters = 2-Wire Initialization,

3-Wire Initialization] to initialize the drive, then upload the

Q2pack project to the drive again.

Note:

• The drive detects this error if there is an error in the Q2pack program that was saved to EEPROM.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

qFL2

Q2pack Fault 2

There was a fault in the Q2pack program.

Examine the Q2pack program and remove the cause of the fault.

This is not a drive fault.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

qFL3

Q2pack Fault 3

There was a fault in the Q2pack program.

Examine the Q2pack program and remove the cause of the fault.

This is not a drive fault.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

qFL

Q2pack Fault

There was a fault in the Q2pack program.

Examine the Q2pack program and remove the cause of the fault.

This is not a drive fault.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

MECHATROLINK Watchdog

The drive detected a watchdog circuit exception

Examine the MECHATROLINK cable connection. If this error

Timer Err

while it received data from the controller.

occurs frequently, examine the wiring and decrease the effects of

electrical interference as specified by these manuals:

• MECHATROLINK-II Installation Guide (MECHATROLINK

Members Association, manual number MMATDEP011)

• MECHATROLINK-III Installation Manual

(MECHATROLINK Members Association, publication

number MMATDEP018)

Note:

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the stop method set in F6-25 [MLII Watchdog Error Sel].

Code

Name

Causes

Possible Solutions

EF0

Option Card External Fault

The communication option received an external

Find the device that caused the external fault and remove the

fault from the controller.

cause.

Clear the external fault input from the controller.

A programming error occurred on the controller

Examine the operation of the controller program.

side.

Note:

• The drive detects this fault if the alarm function on the external device side is operating.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the stop method set in F6-03 [Comm Ext Flt Select (EF0)].

Code

Name

Causes

Possible Solutions

EF1

External Fault (Terminal DI1)

MFDI terminal DI1 caused an external fault through

Find the device that caused the external fault and remove the

an external device.

cause.

Clear the external fault input in the MFDI.

The wiring is incorrect.

Correctly connect the signal line to MFDI terminal DI1.

External Fault [H1-01 = 20 to 2B] is set to MFDI

Correctly set the MFDI.

terminal DI1, but the terminal is not in use.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

EF2

External Fault (Terminal DI2)

MFDI terminal DI2 caused an external fault through

Find the device that caused the external fault and remove the

an external device.

cause.

Clear the external fault input in the MFDI.

The wiring is incorrect.

Correctly connect the signal line to MFDI terminal DI2.

External Fault [H1-02 = 20 to 2B] is set to MFDI

Correctly set the MFDI.

terminal DI2, but the terminal is not in use.

Note:

Do a Fault Reset to clear the fault.

225

7.4 Faults

Code

Name

Causes

Possible Solutions

EF3

External Fault (Terminal DI3)

MFDI terminal DI3 caused an external fault through

Find the device that caused the external fault and remove the

an external device.

cause.

Clear the external fault input in the MFDI.

The wiring is incorrect.

Correctly connect the signal line to MFDI terminal DI3.

External Fault [H1-03 = 20 to 2B] is set to MFDI

Correctly set the MFDI.

terminal DI3, but the terminal is not in use.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

EF4

External Fault (Terminal DI4)

MFDI terminal DI4 caused an external fault through

Find the device that caused the external fault and remove the

an external device.

cause.

Clear the external fault input in the MFDI.

The wiring is incorrect.

Correctly connect the signal line to MFDI terminal DI4.

External Fault [H1-04 = 20 to 2B] is set to MFDI

Correctly set the MFDI.

terminal DI4, but the terminal is not in use.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

EF5

External Fault (Terminal DI5)

MFDI terminal DI5 caused an external fault through

Find the device that caused the external fault and remove the

an external device.

cause.

Clear the external fault input in the MFDI.

The wiring is incorrect.

Correctly connect the signal line to MFDI terminal DI5.

External Fault [H1-05 = 20 to 2B] is set to MFDI

Correctly set the MFDI.

terminal DI5, but the terminal is not in use.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

EF6

External Fault (Terminal DI6)

MFDI terminal DI6 caused an external fault through

Find the device that caused the external fault and remove the

an external device.

cause.

Clear the external fault input in the MFDI.

The wiring is incorrect.

Correctly connect the signal line to MFDI terminal DI6.

External Fault [H1-06 = 20 to 2B] is set to MFDI

Correctly set the MFDI.

terminal DI6, but the terminal is not in use.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

EF7

External Fault (Terminal DI7)

MFDI terminal DI7 caused an external fault through

Find the device that caused the external fault and remove the

an external device.

cause.

Clear the external fault input in the MFDI.

The wiring is incorrect.

Correctly connect the signal line to MFDI terminal DI7.

External Fault [H1-07 = 20 to 2B] is set to MFDI

Correctly set the MFDI.

terminal DI7, but the terminal is not in use.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

Err

EEPROM Write Error

There was a problem with the EEPROM hardware.

• Re-energize the drive.

• If the fault stays, replace the control board or the drive.

Contact the manufacturer or your nearest sales representative

to replace the board.

Electrical interference corrupted the data while it

• Push ENTER Key.

was writing to the EEPROM of the drive.

• Set the parameters again.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

FbH

Excessive PID Feedback

The FbH detection level is set incorrectly.

Adjust b5-36 [PID HiHi Limit Level] and b5-37 [PID HiHi

Time].

There is a problem with the PID feedback wiring.

Correct errors with the PID control wiring.

The feedback sensor is not operating correctly.

Examine the sensors on the control device side.

226

7.4 Faults

Code

Name

Causes

Possible Solutions

A fault occurred in the feedback input circuit of the

Replace the control board or the drive. For information about

drive.

replacing the control board, contact the manufacturer or your

nearest sales representative.

Note:

• The drive detects this fault if the PID feedback input is more than the level set in b5-36 for longer than b5-37.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the stop method set in b5-12 [Fdback Loss Select Mode].

Code

Name

Causes

Possible Solutions

FbL

PID Feedback Loss

The FbL detection level is set incorrectly.

Adjust b5-13 [Fdback Loss Lvl] and b5-14 [Fdback Loss Time].

There is a problem with the PID feedback wiring.

Correct errors with the PID control wiring.

The feedback sensor is not operating correctly.

Examine the sensors on the control device side.

A fault occurred in the feedback input circuit of the

Replace the control board or the drive. For information about

drive.

replacing the control board, contact the manufacturer or your

nearest sales representative.

Note:

• The drive detects this fault if the PID feedback input is more than the level set in b5-13 for longer than b5-14.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the stop method set in b5-12 [Fdback Loss Select Mode].

Code

Name

Causes

Possible Solutions

Ground Fault

Overheating caused damage to the motor or the

Measure the motor insulation resistance, and replace the motor if

motor insulation is not satisfactory.

there is electrical conduction or unserviceable insulation.

The motor main circuit cable is contacting ground

• Examine the motor main circuit cable for damage, and repair

to make a short circuit.

short circuits.

• Measure the resistance between the motor main circuit cable

and the ground terminal. If there is electrical conduction,

replace the cable.

An increase in the stray capacitance of the cable and

• If the wiring length of the cable is more than 100 m, decrease

the ground terminal caused an increase in the

the carrier frequency.

leakage current.

• Decrease the stray capacitance.

There was a problem with the drive hardware.

Replace the control board or the drive. For information about

replacing the control board, contact the manufacturer or your

nearest sales representative.

Note:

• The drive detects this fault if a current short to ground was more than 50% of rated current on the output side of the drive.

• Do a Fault Reset to clear the fault.

• L5-08 [U/OV,OH,GF A-Reset Select] disables the Auto Restart function.

Code

Name

Causes

Possible Solutions

Output Phase Loss

The motor main circuit cable is disconnected.

Connect motor main circuit cable wiring. Correct wiring errors in

the main circuit drive input power.

There is a disconnection in the motor coil winding.

If a coil is disconnected, measure the motor Line-to-Line

Resistance and replace the motor.

The screws on the drive output terminals are loose.

Tighten the terminal screws to the correct tightening torque.

The rated output current of the motor is less than

Examine the drive capacity or the motor output to be applied.

5% of the drive rated current.

You are trying to use a single-phase motor.

The drive cannot operate a single-phase motor.

The output transistor in the drive is damaged.

• Re-energize the drive.

• If the fault stays, replace the control board or the drive. For

information about replacing the control board, contact the

manufacturer or your nearest sales representative.

Note:

• The drive detects this fault if phase loss occurs on the output side of the drive.

• Do a Fault Reset to clear the fault.

• Set L8-07 [Out PhaseLoss Selection] to enable and disable LF detection.

Code

Name

Causes

Possible Solutions

LF2

Output Current Imbalance

Phase loss occurred in the wiring on the output side

Examine for wiring errors or disconnected wires on the output

of the drive.

side of the drive, and repair problems.

The output terminal screws of the drive are loose.

Tighten the terminal screws to the correct tightening torque.

There is not balance between the three phases of the

• Measure the Line-to-Line Resistance for each motor phase and

PM motor impedance.

make sure that resistance is equal in the three phases, and that

all wires are connected correctly.

• Replace the motor.

The drive output circuit is broken.

• Re-energize the drive.

• If the fault stays, replace the control board or the drive. For

information about replacing the control board, contact the

manufacturer or your nearest sales representative.

Note:

• The drive detects this fault if there is not balance between the three phases of the output current from the PM motor.

• Do a Fault Reset to clear the fault.

227

7.4 Faults

Code

Name

Causes

Possible Solutions

LSo

Low Speed Motor Step-Out

The motor code set incorrectly.

• Set E5-01 [PM Mot Code Selection] correctly as specified by

the motor.

• For specialized motors, refer to the motor test report and set

E5-xx correctly.

The load is too large.

• Decrease the load.

• Replace the drive and motor with larger capacity models.

An external force on the load side caused the motor

Find and repair problems on the load side that cause the motor to

to move at start.

rotate from the load side.

The drive incorrectly detected the motor magnetic

• Set b3-01 = 1 [SpSrch@Start Selection = Enabled].

pole position.

• If the value for U6-57 [PoleDis IdDifVal] is lower than 819,

increase the value set in n8-84 [Polarity Det Current]. Consult

the motor manufacturer for information about maximum

setting values.

The setting of n8-84 [Polarity Det Current] is too

Increase the n8-84 setting from the default. Consult the motor

low.

manufacturer for information about maximum setting values.

Incorrect values set in L8-93 [Lso Detect Time], L8-

Increase the values set in L8-93 to L8-95.

94 [Lso Detect Level], and L8-95 [Lso Amount].

The drive incorrectly detected the motor magnetic

If you are using an IPM motor, do High Frequency Injection

pole position.

Auto-Tuning.

Note:

• The drive detects this fault if it detects step-out while running at low speed.

• Do a Fault Reset to clear the fault.

• LSo is a protective function that stops the motor and stops the reverse run if a motor without a motor code incorrectly detects the initial polarity. To quickly detect motor

reversal, decrease the values set in L8-93 to L8-95 to a range in which the drive does not malfunction.

Code

Name

Causes

Possible Solutions

nSE

Node Setup Error

The H1-xx = 7E [Node Setup] terminal was

Stop the drive when the Node Setup function is in use.

activated during run.

The drive received a Run command while the Node

Setup function was active.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

Overcurrent

The load is too heavy.

• Measure the current flowing into the motor.

• Replace the drive with a larger capacity model if the current

value is more than the drive rated current.

• Decrease the load or replace with a larger drive to prevent

sudden changes in the current level.

Overheating caused damage to the motor or the

Measure the motor insulation resistance, and replace the motor if

motor insulation is not satisfactory.

there is electrical conduction or unserviceable insulation.

The motor main circuit cable is contacting ground

• Examine the motor main circuit cable for damage, and repair

to make a short circuit.

short circuits.

• Measure the resistance between the motor main circuit cable

and the ground terminal. If there is electrical conduction,

replace the cable.

A short circuit or ground fault on the drive output

• Make sure that there is not a short circuit in terminal B1 and

side caused damage to the output transistor of the

terminals U/T1, V/T2, and W/T3. Make sure that there is not a

drive.

short circuit in terminals - and terminals U/T1, V/T2, and W/

T3.

• If there is a short circuit, contact the manufacturer or your

nearest sales representative.

The acceleration time is too short.

• Calculate the torque necessary during acceleration related to

the load inertia and the specified acceleration time.

• Increase the values set in C1-01, C1-03, C1-05, or C1-07

[Acceleration Times] to get the necessary torque.

• Increase the values set in C2-01 to C2-04 [S-Curve

Characteristics] to get the necessary torque.

• Replace the drive with a larger capacity model.

The drive is trying to operate a specialized motor or

• Examine the motor nameplate, the motor, and the drive to

a motor that is larger than the maximum applicable

make sure that the drive rated current is larger than the motor

motor output of the drive.

rated current.

• Replace the drive with a larger capacity model.

A magnetic contactor was switched at the output.

Set the operation sequence to not turn ON or OFF the magnetic

contactor while the drive is outputting voltage.

The V/f pattern settings are incorrect.

• Examine the ratios between the V/f pattern frequency and

voltage. Decrease the voltage if it is too high compared to the

frequency.

• Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2,

adjust E3-04 to E3-10.

The torque compensation gain is too large.

Decrease the value set in C4-01 [Trq Comp Gain] to make sure

that the motor does not stall.

Electrical interference caused a problem.

Examine the control circuit lines, main circuit lines, and ground

wiring, and decrease the effects of electrical interference.

228

7.4 Faults

Code

Name

Causes

Possible Solutions

The gain during overexcitation operation is too

• Find the time when the fault occurs.

large.

• If the fault occurs at the same time as an overexcitation

operation, decrease n3-13 [OverExcBr Gain] and consider the

motor flux saturation.

The drive received a Run command while the motor

• Examine the sequence and input the Run command after the

was coasting.

motor fully stops.

• Set b3-01 = 1 [SpSrch@Start Selection = Enabled] or set H1-

xx = 67, 68 [SpdSrch Fmax, SpdSrch Fref] to input speed

search commands from the MFDI terminals.

In PM Control Methods, the setting of the motor

• Enter the correct motor code to E5-01 [PM Mot Code

code is incorrect.

Selection] as specified by the PM motor.

• For specialized motors, refer to the motor test report and set

E5-xx [PM Motor Settings] correctly.

If the drive detects the fault at start or in the low

• Set E5-xx [PM Motor Parameters] correctly or do Rotational

speed range (10% or less) and n8-57 = 1 [High-

Auto-Tuning.

Freq Injection = Enabled] for PM Control methods,

• Decrease the value of n8-41 [HFI PoleDet Pgain] in 0.5-unit

the high frequency injection gain is too high.

increments.

Note:

Set n8-41 > 0.0 for an ordinary IPM motor.

The control method is set incorrectly for the motor.

Set A1-02 [Control Method] correctly.

The motor main circuit cable is too long.

• Replace the drive with a larger capacity model.

• Decrease C6-02 [Carrier Frequency Selection]. Or set C6-02

= B.

Speed search does not complete at start when you

When E9-01 = 0 [Motor Type Selection = IM], set b3-24 = 2

set A1-02 = 8 [EZ Vector] and use an induction

[SpSrch Method Selection = Current Det2].

motor.

An overcurrent occurred during overexcitation

• Decrease n3-13 [OverExcBr Gain].

deceleration.

• Decrease n3-21 [OverExcBr Current Level].

Note:

• This fault occurs if the drive sensors detect a drive output current more than the specified overcurrent detection level.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oC2

Overcurrent2

When A1-02 = 5, 6, 8 [Control Method = PM

Correct the value set in L8-27.

OLVector, PM AOLVector, or EZ Vector], the output

current is more than the value set in L8-27

[OverCurr Det Gain].

Note:

• This fault occurs if the drive sensors detect a drive output current more than the specified overcurrent detection level.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oFA00

Option Not Compatible with Port

The option connected to connector CN5 is not

Connect a correct option.

compatible.

Note:

• Do a Fault Reset to clear the fault.

• Fault trace is not available for these faults.

Code

Name

Causes

Possible Solutions

oFA01

Option Fault/Connection Error

You changed the option card connected to

De-energize the drive.

connector CN5 during operation.

Refer to the option card manual and correctly connect the

option card to the connector on the drive.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oFA03 to

Option Card Error Occurred at

A fault occurred in the option card.

De-energize the drive.

oFA06

Option Port (CN5)

Make sure that the option card is correctly connected to the

connector.

If the problem continues, replace the option card.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oFA10, oFA11

Option Card Error Occurred at

A fault occurred in the option card.

De-energize the drive.

Option Port (CN5)

Make sure that the option card is correctly connected to the

connector.

If the problem continues, replace the option card.

Note:

Do a Fault Reset to clear the fault.

229

7.4 Faults

Code

Name

Causes

Possible Solutions

oFA12 to

Option Card Connection Error

A fault occurred in the option card.

De-energize the drive.

oFA17

(CN5)

Make sure that the option card is correctly connected to the

connector.

If the problem continues, replace the option card.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oFA30 to

Communication Option Card

A fault occurred in the option card.

De-energize the drive.

oFA43

Connection Error (CN5)

Make sure that the option card is correctly connected to the

connector.

If the problem continues, replace the option card.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

Heatsink Overheat

The ambient temperature is high and the heatsink

•

Measure the ambient temperature.

temperature of the drive is more than the value set

•

Increase the airflow in the control panel.

in L8-02 [Overheat Alm Level].

•

Install a cooling device (cooling fan or air conditioner) to

lower the ambient temperature.

•

Remove objects near the drive that are producing too much

heat.

The load is too heavy.

•

Measure the output current.

•

Decrease the load.

•

Decrease the value set in C6-02 [Carrier Frequency

Selection].

The internal cooling fan of the drive stopped.

Use the procedures in this manual to replace the cooling fan.

Set o4-03 = 0 [Fan.Oper Setting = 0 h].

Note:

• The drive detects this fault if the heatsink temperature of the drive is more than the value set in L8-02.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L8-03

[Overheat Pre-Alarm Selection].

Code

Name

Causes

Possible Solutions

oH1

Heatsink Overheat

The ambient temperature is high and the heatsink

• Measure the ambient temperature.

temperature of the drive is more than the oH1

• Increase the airflow in the control panel.

detection level.

• Install a cooling device (cooling fan or air conditioner) to

lower the ambient temperature.

• Remove objects near the drive that are producing too much

heat.

The load is too heavy.

• Measure the output current.

• Decrease the load.

• Decrease the value set in C6-02 [Carrier Frequency

Selection].

Note:

• The drive detects this fault if the heatsink temperature of the drive is more than the oH1 detection level. o2-04 [Drive KVA Selection] determines the oH1 detection level.

• Do a Fault Reset to clear the fault.

• L5-08 [U/OV,OH,GF A-Reset Select] disables the Auto Restart function.

Code

Name

Causes

Possible Solutions

oH3

Motor Overheat (PTC Input)

The thermistor wiring that detects motor

Correct wiring errors.

temperature is defective.

A fault occurred on the machine.

Examine the machine and remove the cause of the fault

Example: The machine is locked.

The motor has overheated.

• Check the load level, acceleration/deceleration time, and motor

start/stop frequency (cycle time).

• Decrease the load.

• Increase the values set in C1-01 to C1-08 [Acceleration/

Deceleration Times].

• Set E2-01 [Mot Rated Current (FLA)] correctly to the value

specified by the motor nameplate.

• Make sure that the motor cooling system is operating correctly,

and repair or replace it if it is damaged.

• Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2,

adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid

A Voltage] and E1-10 [Min Output Voltage].

Note:

If the values set in E1-08 and E1-10 are too low, the overload

tolerance will decrease at low speeds.

Note:

• When H3-02 or H3-10 = 16 [MFAI Function Select = Mot PTC Input], the drive detects this fault if the motor overheat signal input from analog input terminal AI1 or AI2 is

more than the alarm detection level.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L1-03 [Motor oH AL Reaction Select].

230

7.4 Faults

Code

Name

Causes

Possible Solutions

oH4

Motor Overheat Fault (PTC Input)

The motor has overheated.

• Check the load level, acceleration/deceleration time, and motor

start/stop frequency (cycle time).

• Decrease the load.

• Increase the values set in C1-01 to C1-08 [Acceleration/

Deceleration Times].

• Set E2-01 [Mot Rated Current (FLA)] correctly to the value

specified by the motor nameplate.

• Make sure that the motor cooling system is operating correctly,

and repair or replace it if it is damaged.

• Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2,

adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid

A Voltage] and E1-10 [Min Output Voltage].

Note:

If the values set in E1-08 and E1-10 are too low, the overload

tolerance will decrease at low speeds.

Note:

• The drive detects this fault if the motor overheat signal in analog input terminals A1, or A2 is more than the Fault detection level. (If H3-02, H3-10= 16 [AI1/AI2 Function

Select = Mot PTC Input].)

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oL1

Motor Overload

The load is too large.

Decrease the load.

Note:

Reset oL1 when U4-16 [MotorOLEstimate (oL1)] < 100.

The acceleration/deceleration times or cycle times

• Examine the acceleration/deceleration times and the motor

are too short.

start/stop frequencies (cycle times).

• Increase the values set in C1-01 to C1-08 [Acceleration/

Deceleration Times].

Overload occurred while running at low speed.

• Decrease the load when running at low speed.

• Increase the motor speed.

• If the motor is run frequently at low speeds, replace the motor

with a larger motor or use a drive-dedicated motor.

Note:

For general-purpose motors, overload can occur while

running at low speed when operating at below the rated

current.

L1-01 [Motor Cool Type for OL1 Calc] is set

Set L1-01 in as specified by the motor qualities for a drive-

incorrectly.

dedicated motor.

The V/f pattern does not fit the motor qualities.

• Examine the ratios between the V/f pattern frequency and

voltage. Decrease the voltage if it is too high compared to the

frequency.

• Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2,

adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid

A Voltage] and E1-10 [Min Output Voltage].

Note:

If the values set in E1-08 and E1-10 are too low, the overload

tolerance will decrease at low speeds.

E1-06 [Base Frequency] is set incorrectly.

Set E1-06 to the rated frequency shown on the motor nameplate.

One drive is operating more than one motor.

Set L1-01 = 0 [Motor Cool Type for OL1 Calc = Disabled],

connect thermal overload relay to each motor to prevent damage

to the motor.

The electronic thermal protector qualities and the

• Examine the motor qualities and set L1-01 [Motor Cool Type

motor overload properties do not match.

for OL1 Calc] correctly.

• Connect a thermal overload relay to the motor.

The electronic thermal protector is operating at an

Set E2-01 [Mot Rated Current (FLA)] correctly to the value

incorrect level.

specified by the motor nameplate.

There is increased motor loss from overexcitation

• Lower the value set in n3-13 [OverExcBr Gain].

operation.

• Set L3-50 ≠ 3 or 4 [StallP@Decel Mode ≠ HiFlux

Overexcitation or HiFlux2 Overexcitation].

• Set L3-04 = 0 [StallP@Decel Enable = Disabled].

The speed search-related parameters are set

• Examine the settings for all speed search related parameters.

incorrectly.

• Adjust b3-03 [SpSrch Deceleration Time].

• Set b3-24 = 1 [SpSrch Method Selection = Speed Estimation]

after Auto-Tuning.

Phase loss in the input power supply is causing the

Make sure that there is no phase loss, and repair problems.

output current to change.

The motor main circuit cable is too long.

• Replace the drive with a larger capacity model.

• Decrease C6-02 [Carrier Frequency Selection]. Or set C6-02

= B.

Note:

• The drive detects this fault if the electronic thermal protector of the drive started the motor overload protection.

• Do a Fault Reset to clear the fault.

• L5-07 [OL1-4 Auto-Reset Select] disables the Auto Restart function.

231

7.4 Faults

Code

Name

Causes

Possible Solutions

oL2

Drive Overload

The load is too large.

Decrease the load.

The acceleration/deceleration times or cycle times

• Examine the acceleration/deceleration times and the motor

are too short.

start/stop frequencies (cycle times).

• Increase the values set in C1-01 to C1-08 [Acceleration/

Deceleration Times].

The V/f pattern does not fit the motor qualities.

• Examine the ratios between the V/f pattern frequency and

voltage. Decrease the voltage if it is too high compared to the

frequency.

• Adjust E1-04 to E1-10 [V/f Pattern Parameters]. Decrease the

values set in E1-08 [Mid A Voltage] and E1-10 [Min Output

Voltage]. For motor 2, adjust E3-04 to E3-10.

Note:

If the values set in E1-08 and E1-10 are too low, the overload

tolerance will decrease at low speeds.

The drive capacity is too small.

Replace the drive with a larger capacity model.

Overload occurred while running at low speed.

• Decrease the load when running at low speed.

• Replace the drive with a larger capacity model.

• Decrease the value set in C6-02 [Carrier Frequency

Selection].

The torque compensation gain is too large.

Decrease the value set in C4-01 [Trq Comp Gain] to make sure

that the motor does not stall.

The speed search-related parameters are set

• Examine the settings for all speed search-related parameters.

incorrectly.

• Adjust b3-03 [SpSrch Deceleration Time].

• Set b3-24 = 1 [SpSrch Method Selection = Speed Estimation]

after Auto-Tuning.

Phase loss in the input power supply is causing the

• Correct errors with the wiring for main circuit drive input

output current to change.

power.

• Make sure that there is no phase loss, and repair problems.

Overload occurred during overexcitation

• Decrease the value set in n3-13 [OverExcBr Gain].

deceleration.

• Decrease the value set in n3-21 [OverExcBr Current Level].

Note:

• The drive detects this fault if the electronic thermal protector of the drive started the drive overload protection.

• Do a Fault Reset to clear the fault.

• L5-07 [OL1-4 Auto-Reset Select] disables the Auto Restart function.

Code

Name

Causes

Possible Solutions

oL3

Overtorque Detection 1

A fault occurred on the machine.

Examine the machine and remove the cause of the fault.

Example: The machine is locked.

The parameters are incorrect for the load.

Adjust L6-02 [Trq Det1 Level] and L6-03 [Trq Det1 Time]

settings.

Note:

• The drive detects this fault if the drive output current is more than the level set in L6-02 for longer than L6-03.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L6-01 [Trq Det1 Select].

• L5-07 [OL1-4 Auto-Reset Select] disables the Auto Restart function.

Code

Name

Causes

Possible Solutions

oL4

Overtorque Detection 2

A fault occurred on the machine.

Examine the machine and remove the cause of the fault.

Example: The machine is locked.

The parameters are incorrect for the load.

Adjust L6-05 [Trq Det2 Level] and L6-06 [Trq Det2 Time]

settings.

Note:

• The drive detects this fault if the drive output current is more than the level set in L6-05 for longer than L6-06.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L6-04 [Trq Det2 Select].

• L5-07 [OL1-4 Auto-Reset Select] disables the Auto Restart function.

Code

Name

Causes

Possible Solutions

oL5

Mechanical Weakening Detection 1

The drive detected overtorque as specified by the

Do a deterioration diagnostic test on the machine side.

conditions for mechanical weakening detection set

in L6-08 [MechF Enable].

Note:

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L6-08.

232

7.4 Faults

Code

Name

Causes

Possible Solutions

oL7

High Slip Braking Overload

The load inertia is too large.

• Decrease deceleration times in C1-02, C1-04, C1-06, and C1-

08 [Deceleration Times] for applications that do not use High

An external force on the load side rotated the motor.

Slip Braking.

• Use a braking resistor to decrease the deceleration time.

Something is preventing deceleration on the load

side.

The value set in n3-04 [HSB Overload Time] is too

• Increase the value set in n3-04.

small.

• Connect a thermal overload relay to the motor, and set n3-04 =

1200 s (maximum value).

Note:

• The drive detects this fault if the output frequency is constant for longer than n3-04.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

oPr

Keypad Connection Fault

The keypad is not securely connected to the

Examine the connection between the keypad and the drive.

connector on the drive.

The connection cable between the drive and the

• Remove the keypad and then reconnect it.

keypad is disconnected.

• Replace the cable if damaged.

Note:

• The drive detects this fault if these conditions are correct:

-o2-06 = 1 [Keypad Disconnect Detection = Enabled].

-b1-02 = 0 [Run Comm. Sel 1 = Keypad], or the drive is operating in LOCAL Mode with the keypad.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

Overspeed

There is overshoot.

• Decrease C5-01 [ASR PGain 1] and increase C5-02 [ASR

ITime 1].

• Use H6-02 to H6-05 [Pulse Train Input Setting Parameters]to

adjust the pulse train gain.

There is an incorrect number of PG pulses set in the

Set H6-02 [PI Frequency Scale] to the pulse train frequency

drive.

during 100% reference (maximum motor rotation speed).

The oS detection level is set incorrectly.

Adjust F1-08 [Overspeed Level] and F1-09 [Overspeed Delay

Time].

If the drive detects the fault at start or in the low

• Set E5-xx [PM Motor Parameters] correctly or do Rotational

speed range (10% or less) and n8-57 = 1 [High-

Auto-Tuning.

Freq Injection = Enabled] for PM Control methods,

• Decrease the value of n8-41 [HFI PoleDet Pgain] in 0.5 unit

the high frequency injection gain is too high.

increments.

Note:

Set n8-41 > 0.0 for IPM motors.

Note:

• The drive detects this fault if the motor speed is more than the value set in F1-08 for longer than F1-09.

• Do a Fault Reset to clear the fault.

• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in F1-03 [Overspeed Detection Selection].

Code

Name

Causes

Possible Solutions

Overvoltage

The deceleration time is too short and too much

• Increase the values set in C1-02, C1-04, C1-06, or C1-08

regenerative energy is flowing back into the drive.

[Deceleration Times].

• Connect a dynamic braking option to the drive.

• Perform Deceleration Rate Tuning.

The acceleration time is too short.

• Make sure that sudden drive acceleration does not cause the

fault.

• Increase the values set in C1-01, C1-03, C1-05, or C1-07

[Acceleration Times].

• Increase the value set in C2-02 [Jerk@End of Accel].

• Set L3-11 = 1 [Overvolt Supression Select = Enabled].

The braking load is too large.

Connect a dynamic braking option to the drive.

There are surge voltages in the input power supply

Connect a DC reactor to the drive.

Note:

If you turn the phase advancing capacitors ON and OFF and

use thyristor converters in the same power supply system,

there can be surge voltages that irregularly increase the input

voltage.

The drive output cable or motor is shorted to ground

Examine the motor main circuit cable, terminals, and motor

(the current short to ground is charging the main

terminal box, and then remove ground faults.

circuit capacitor of the drive through the power

Re-energize the drive.

supply).

If the drive detects ov in these conditions, the speed

• Examine the settings for all speed search related parameters.

search-related parameters are incorrect.

• Set b3-19 ≠ 0 [Speed Retry Times ≠ 0 times].

• During speed search

• Adjust b3-03 [SpSrch Deceleration Time].

• During momentary power loss recovery

• Do Stationary Auto-Tuning for Line-to-Line Resistance and

• When the drive starts again automatically

then set b3-24 = 1 [SpSrch Method Selection = Speed

Estimation].

The power supply voltage is too high.

Decrease the power supply voltage to match the drive rated

voltage.

233

7.4 Faults

Code

Name

Causes

Possible Solutions

The braking resistor or braking resistor unit wiring

Correct wiring errors in the connection to the braking resistor or

is incorrect.

braking resistor unit.

Electrical interference caused a drive malfunction.

• Examine the control circuit lines, main circuit lines, and

ground wiring, and decrease the effects of electrical

interference.

• Make sure that a magnetic contactor is not the source of the

electrical interference, then use a Surge Protective Device if

necessary.

The load inertia is set incorrectly.

• Examine the load inertia settings with KEB, overvoltage

suppression, or stall prevention during deceleration.

• Adjust L3-25 [Load Inertia Ratio] to match the qualities of the

machine.

The Short Circuit Braking function used in OLV/

Connect a braking resistor to the drive.

PM control method.

There is motor hunting.

• Set n1-01 = 1 [HuntPrev Selection = Enabled] and adjust n1-

02 [HuntPrev Gain Setting].

• Adjust n2-02 [AFR Time 1] and n2-03 [AFR Time 2].

• Adjust n8-45 [SpdFbck Det.Gain] and n8-47 [Pull-In Comp.

Time Constant].

Speed search does not complete at start when you

When E9-01 = 0 [Motor Type Selection = IM], set b3-24 = 2

set A1-02 = 8 [EZ Vector] and use an induction

[SpSrch Method Selection = Current Det2].

motor.

Note:

• The drive detects this error if the DC bus voltage is more than the ov detection level while the drive is running.

• The ov detection level is approximately 410 V with 200 V class drives. The detection level is approximately 820 V for 400 V class drives.

• Do a Fault Reset to clear the fault.

• L5-08 [U/OV,OH,GF A-Reset Select] disables the Auto Restart function.

Code

Name

Causes

Possible Solutions

PE1, PE2

PLC Faults

The communication option detected a fault.

Refer to the manual for the communication option card.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

Input Phase Loss

There is a phase loss in the drive input power.

Correct errors with the wiring for main circuit drive input power.

There is loose wiring in the drive input power

Tighten the terminal screws to the correct tightening torque.

terminals.

The drive input power voltage is changing too

• Examine the input power for problems.

much.

• Make the drive input power stable.

• If the input power supply is good, examine the magnetic

contactor on the main circuit side for problems.

There is unsatisfactory balance between voltage

• Examine the input power for problems.

phases.

• Make the drive input power stable.

• Set L8-05 = 0 [In PhaseLoss Selection = Disabled].

The main circuit capacitors have become

• Examine the capacitor maintenance time in monitor U4-05

unserviceable.

[Capacitor Maintenance]. If U4-05 is more than 90%, replace

the control board or the drive. For information about replacing

the control board, contact the manufacturer or your nearest

sales representative.

• If drive input power is correct and the fault stays, replace the

control board or the drive. For information about replacing the

control board, contact the manufacturer or your nearest sales

representative.

Note:

• The drive detects this error if the DC bus voltage changes irregularly without regeneration.

• Do a Fault Reset to clear the fault.

• Use L8-05 to enable and disable PF detection.

Code

Name

Causes

Possible Solutions

PGo

Encoder (PG) Feedback Loss

The holding brake is stopping the motor.

Release the holding brake.

Note:

• Do a Fault Reset to clear the fault.

• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in F1-02

[PGOpen Detection Select].

Code

Name

Causes

Possible Solutions

Braking Resistor Fault

The resistance of the dynamic braking option

Use a dynamic braking option that fits the model and duty rating

connected to the drive is too low.

of the drive.

A regenerative converter or regenerative unit is

Set L8-55 = 0 [DB IGBT Protection = Disable].

connected to the drive.

Note:

Do a Fault Reset to clear the fault.

234

7.4 Faults

Code

Name

Causes

Possible Solutions

Braking Resistor Overheat

The deceleration time is too short and excessive

• Check the load level, deceleration time, and speed.

regenerative energy is flowing back into the drive.

• Decrease the load.

• Increase the values set in C1-02, C1-04, C1-06, or C1-08

[Deceleration Times].

• Use a dynamic braking option that lets you use more power.

The duty cycle is too high.

Examine the duty cycle.

Note:

When L8-01 = 1 [3%ERF DBR Protection = Enabled], the

maximum braking duty cycle is 3%.

The braking load is too heavy.

• Calculate the braking load and braking power again, and

decrease the braking load.

• Use a braking resistor that improves braking power.

The braking resistor is not sufficient.

Use the braking resistor specifications to select a sufficient

braking resistor.

Note:

• The drive detects this error if the braking resistor overheat protective function is active.

• The magnitude of the braking load causes the braking resistor overheat alarm, NOT the surface temperature. If the duty cycle is higher than the braking resistor rating, the

drive will show the alarm.

• Do a Fault Reset to clear the fault.

• Parameter L8-01 enables and disables rH detection.

Code

Name

Causes

Possible Solutions

Dynamic Braking Transistor Fault

The drive control circuit is damaged.

• Re-energize the drive.

• If the fault stays, replace the control board or the drive. For

There is a malfunction in the internal braking

information about replacing the control board, contact the

transistor of the drive.

manufacturer or your nearest sales representative.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

Short Circuit/IGBT Failure

Overheating caused damage to the motor or the

Measure the motor insulation resistance, and replace the motor if

motor insulation is not satisfactory.

there is electrical conduction or unserviceable insulation.

The motor main circuit cable is contacting ground

• Examine the motor main circuit cable for damage, and repair

to make a short circuit.

short circuits.

• Measure the resistance between the motor main circuit cable

and the ground terminal. If there is electrical conduction,

replace the cable.

A short circuit or ground fault on the drive output

• Make sure that there is not a short circuit in terminal B1 and

side caused damage to the output transistor of the

terminals U/T1, V/T2, and W/T3. Make sure that there is not a

drive.

short circuit in terminals - and terminals U/T1, V/T2, and W/

T3.

• If there is a short circuit, contact the manufacturer or your

nearest sales representative.

When A1-02 = 5, 6 [Control Method = PM

Set L8-27 correctly.

OLVector or PM AOLVector], the output current is

more than the value set in L8-27 [OverCurr Det

Gain].

Note:

• The drive detects this error if there is a short circuit or ground fault on the drive output side, or an IGBT failure.

• Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

SCF

Safety Circuit Fault

The safety circuit is broken.

Replace the control board or the drive. For information about

replacing the control board, contact the manufacturer or your

nearest sales representative.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

SEr

Speed Search Retries Exceeded

The speed search-related parameters are set

• Decrease the value set in b3-10 [Speed Det Gain for

incorrectly.

Estimation].

• Increase the value set in b3-17 [Speed Retry Current Level].

• Increase the value set in b3-18 [Speed Retry Delay].

• Do Auto-Tuning again.

The motor is coasting in the opposite direction of

Set b3-14 = 1 [Speed Bi-Directional Search = Enabled].

the Run command.

Note:

• The drive detects this error if the number of speed search restarts is more than the value set in b3-19 [Speed Retry Times].

• Do a Fault Reset to clear the fault.

235

7.4 Faults

Code

Name

Causes

Possible Solutions

STPo

Motor Step-Out Detected

The motor code is set incorrectly for PM Control

• Set E5-01 [PM Mot Code Selection] correctly as specified by

Methods.

the motor.

• For specialized motors, refer to the motor test report and set

E5-xx correctly.

The load is too large.

• Increase the value set in n8-55 [Load Inertia].

• Increase the value set in n8-51 [Ac/Dec Pull-In Current]. If the

drive detects STPo during deceleration when increasing the

value set in n8-51, set the value of n8-79 [Pull-In

Curr@Deceleration] lower than n8-51.

• Decrease the load.

• Replace the drive and motor with larger capacity models.

The load inertia is too large.

Increase the value set in n8-55.

The acceleration/deceleration times are too short.

• Increase the values set in C1-01 to C1-08 [Acceleration/

Deceleration Times].

• Increase the value set in C2-01 [Jerk@Start of Accel].

Speed response is too slow.

Increase the value set in n8-55.

Note:

Do a Fault Reset to clear the fault.

Code

Name

Causes

Possible Solutions

TiM

Keypad Time Not Set

There is a battery in the keypad, but the date and

Use the keypad to set the date and time.

time are not set.

Note:

• Do a Fault Reset to clear the fault.

• Parameter o4-24 [bAT Detection Selection] enables and disables TiM detection.

Code

Name

Causes

Possible Solutions

UL3

Undertorque Detection 1

A fault occurred on the machine.

Examine the machine and remove the cause of the fault.

Example: There is a broken pulley belt.

The parameters are incorrect for the load.

Adjust L6-02 [Trq Det1 Level] and L6-03 [Trq Det1 Time]

settings.

Note:

• The drive detects this error if the drive output current is less than the level set in L6-02 for longer than L6-03.

• Do a Fault Reset to clear the fault.

• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-01 [Trq Det1 Select].

Code

Name

Causes

Possible Solutions

UL4

Undertorque Detection 2

A fault occurred on the machine.

Examine the machine and remove the cause of the fault.

Example: There is a broken pulley belt.

The parameters are incorrect for the load.

Adjust L6-05 [Trq Det2 Level] and L6-06 [Trq Det2 Time]

settings.

Note:

• The drive detects this error if the drive output current is less than the level set in L6-05 for longer than L6-06.

• Do a Fault Reset to clear the fault.

• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-04 [Trq Det2 Select].

Code

Name

Causes

Possible Solutions

UL5

Mechanical Weakening Detection 2

The drive detected undertorque as specified by the

Examine the machine for deterioration.

conditions for mechanical weakening detection set

in L6-08 [MechF Enable].

Note:

• Do a Fault Reset to clear the fault.

• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-08.

Code

Name

Causes

Possible Solutions

Uv1

DC Bus Undervoltage

There is a phase loss in the drive input power.

Correct errors with the wiring for main circuit drive input power.

There is loose wiring in the drive input power

Tighten the terminal screws to the correct tightening torque.

terminals.

The drive input power voltage is changing too

• Examine the input power for problems.

much.

• Make the drive input power stable.

• If the input power supply is good, examine the magnetic

contactor on the main circuit side for problems.

There was a loss of power.

Use a better power supply.

The main circuit capacitors have become

Examine the capacitor maintenance time in monitor U4-05

unserviceable.

[Capacitor Maintenance]. If U4-05 is more than 90%, replace the

control board or the drive. For information about replacing the

control board, contact the manufacturer or your nearest sales

representative.

236

7.4 Faults

Code

Name

Causes

Possible Solutions

The relay or contactor on the soft-charge bypass

U4-06 [SoftChgRelay Maint] shows the performance life of the

relay is damaged.

soft-charge bypass relay. If U4-06 is more than 90%, replace the

board or the drive. For information about replacing the board,

contact the manufacturer or your nearest sales representative.

Note:

• The drive detects this error if the DC bus voltage decreases below the level set in L2-05 [UV Detection Lvl (Uv1)] while the drive is running.

• The Uv1 detection level is approximately 190 V for a 200 V class drives. The detection level is approximately 380 V for 400 V class drives. The detection level is

approximately 350 V when E1-01 [Input AC Supply Voltage] < 400.

• Do a Fault Reset to clear the fault.

• Fault trace is not available for this fault.

• L5-08 [U/OV,OH,GF A-Reset Select] disables the Auto Restart function.

Code

Name

Causes

Possible Solutions

Uv2

Control Power Undervoltage

The value set in L2-02 [RideThrough Time@Power

Connect the momentary power loss recovery unit to the drive.

Loss] increased and the momentary power loss

recovery unit is not connected to the drive.

There was a problem with the drive hardware.

• Re-energize the drive.

• If the fault stays, replace the control board or the drive. For

information about replacing the control board, contact the

manufacturer or your nearest sales representative.

Note:

• The drive detects this error if the control power supply voltage decreases.

• Do a Fault Reset to clear the fault.

• Fault trace is not available for this fault.

Code

Name

Causes

Possible Solutions

Uv3

Soft Charge Answerback Fault

The relay or contactor on the soft-charge bypass

• Re-energize the drive.

relay is damaged.

• If the fault stays, replace the control board or the drive.

• Check monitor U4-06 [SoftChgRelay Maint] shows the

performance life of the soft-charge bypass relay. If U4-06 is

more than 90%, replace the board or the drive. For information

about replacing the control board, contact the manufacturer or

your nearest sales representative.

Note:

• Do a Fault Reset to clear the fault.

• Fault trace is not available for these faults.

237

Q2V Driving Quality. Technical Manual (Item code: Q2V-Axxxx-xxx, 2020) - page 6