Q2V Driving Quality. Technical Manual (Item code: Q2V-Axxxx-xxx, 2020) - page 17
12.7 H: TERMINALS
Figure 12.102 Circuit Diagram When Used as the Sourcing Output
• Use the pulse train monitor as the sinking input
External Power Supply (V)
12 VDC ± 10%, 15 VDC ± 10%
Sinking current (mA)
16 mA or less
Figure 12.103 Circuit Diagram When Used as the Sinking Input
■ H6-07: PO Freq.Scaling
No.
Default
Name
Description
(Hex.)
(Range)
H6-07
PO Freq.Scaling
V/f
OLV OLV/PM AOLV/PM EZOLV
1440 Hz
(0432)
Sets the frequency of the pulse train output signal used when the monitor set with H6-06 [PO
(0 - 32000 Hz)
Mon.Selection] is 100%.
RUN
When H6-06 = 102 [PO Mon.Selection = Output Frequency] and H6-07 = 0, the pulse train output terminal PO
outputs the same frequency as the drive output frequency.
■ H6-08: PI Minimum Frequency
No.
Default
Name
Description
(Hex.)
(Range)
H6-08
PI Minimum Frequency
V/f
OLV OLV/PM AOLV/PM EZOLV
0.5 Hz
(043F)
Sets the minimum frequency of the pulse train signal that terminal PI can detect.
(0.1 - 1000.0 Hz)
• When you input a pulse train frequency that is less than the value of H6-08, the pulse train input is 0.0 Hz.
• Set H6-01 [PI Pulse Train Function] = 0 [Freq Ref], 1 [PIDFbk Value], or 2 [PID SP Value] to enable this
parameter.
• When H6-01 = 3 [PG Feedback], the drive applies the setting of F1-14 [Enc PGOpen Time for Detection] to
the minimum frequency.
■ H6-09 PO Volt.PhaseSync Selection
No.
Default
Name
Description
(Hex.)
(Range)
H6-09
PO Volt.PhaseSync
V/f
OLV OLV/PM AOLV/PM EZOLV
0
Selection
(156E)
Set whether to output the pulse synchronized with drive output voltage phase from the pulse train
(0, 1)
monitor output terminal PO. This parameter is only enabled when H6-06 = 102 [PO Mon.
Selection = Output Frequency] and H6-07 = 0 [PO Freq.Scaling = 0 Hz].
0 : Disabled
1 : Enabled
◆ H7: VIRTUAL INPUT OUTPUT
The virtual I/O function performs the following.
• Inputs the result of the output from the MFDO terminal to the MFDI terminal without external wiring.
628
12.7 H: TERMINALS
• Inputs the result of the output from the MFAO terminal to the MFAI terminal without external wiring.
WARNING! Sudden Movement Hazard. Before you do a test run, make sure that the setting values for virtual input and output
function parameters are correct. Virtual input and output functions can have different default settings and operation than wired
input and output functions. Incorrect function settings can cause serious injury or death.
Figure 12.104 Virtual Analog I/O Functional Block Diagram
H7-10
H7-11
H7-01
[Virtual Multi-Function
[Virtual Output
[Virtual Multi-Function
Output 1]
1 Delay Time]
Input 1]
Figure 12.105 Virtual Digital I/O Functional Block Diagram
Note:
• Refer to H1: DIGITAL INPUTS on page 566 for more information on the virtual digital input setting values.
• Refer to H2: DIGITAL OUTPUTS on page 587 for more information on the virtual digital output setting values.
• Refer to H3: ANALOG INPUTS on page 609 for more information on the virtual analog input setting values.
• Refer to H4: ANALOG OUTPUTS on page 619 for more information on the virtual analog output setting values.
• You cannot set 5 [3-Wire Seq.] and 20 to 2F [External Fault] to H7-01 to H7-04 [Virtual In1 Select Function to Virtual In4 Select
Function].
• If the terminal is not used, set H7-01 to H7-04 = 0. However, the through mode function is not supported.
■ H7-00: Virtual MFIO Selection
No.
Default
Name
Description
(Hex.)
(Range)
H7-00
Virtual MFIO Selection
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(116F)
Sets the function to enable and disable the virtual I/O function. Set this parameter to 1 to operate
(0, 1)
the virtual I/O function.
Expert
0 : Disabled
1 : Enabled
■ H7-01: Virtual In1 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-01
Virtual In1 Select Function
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(1185)
Sets the function that enters the virtual input set in H7-10 [Virtual Out1 Select Function].
(0 - 4, 6 - 19F)
Expert
■ H7-02: Virtual In2 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-02
Virtual In2 Select Function
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(1186)
Sets the function that enters the virtual input set in H7-12 [Virtual Out2 Select Function].
(0 - 4, 6 - 19F)
Expert
■ H7-03: Virtual In3 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
12
H7-03
Virtual In3 Select Function
0
(1187)
Sets the function that enters the virtual input set in H7-14 [Virtual Out3 Select Function].
(0 - 4, 6 - 19F)
Expert
629
12.7 H: TERMINALS
■ H7-04: Virtual In4 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-04
Virtual In4 Select Function
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(1188)
Sets the function that enters the virtual input set in H7-16 [Virtual Out4
Select Function].
(0 - 4, 6 - 19F)
Expert
■ H7-10: Virtual Out1 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-10
Virtual Out1 Select
V/f
OLV OLV/PM AOLV/PM EZOLV
0
Function
(11A4)
Sets the function for virtual digital output 1.
(0 - 1A7)
Expert
■ H7-11: Virtual Out1 Delay Time
No.
Default
Name
Description
(Hex.)
(Range)
H7-11
Virtual Out1 Delay Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.1 s
(11A5)
Sets the minimum ON time for virtual digital output 1.
(0.0 - 25.0 s)
Expert
■ H7-12: Virtual Out2 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-12
Virtual Out2 Select
V/f
OLV OLV/PM AOLV/PM EZOLV
0
Function
(11A6)
Sets the function for virtual digital output 2.
(0 - 1A7)
Expert
■ H7-13: Virtual Out2 Delay Time
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
H7-13
Virtual Out2 Delay Time
0.1 s
(11A7)
Sets the minimum ON time for virtual digital output 2.
(0.0 - 25.0 s)
Expert
■ H7-14: Virtual Out3 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-14
Virtual Out3 Select
V/f
OLV OLV/PM AOLV/PM EZOLV
0
Function
(11A8)
Sets the function for virtual digital output 3.
(0 - 1A7)
Expert
■ H7-15: Virtual Out3 Delay Time
No.
Default
Name
Description
(Hex.)
(Range)
H7-15
Virtual Out3 Delay Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.1 s
(11A9)
Sets the minimum ON time for virtual digital output 3.
(0.0 - 25.0 s)
Expert
■ H7-16: Virtual Out4 Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-16
Virtual Out4 Select
V/f
OLV OLV/PM AOLV/PM EZOLV
0
Function
(11AA)
Sets the function for virtual digital output 4.
(0 - 1A7)
Expert
630
12.7
H: TERMINALS
■ H7-17: Virtual Out4 Delay Time
No.
Default
Name
Description
(Hex.)
(Range)
H7-17
Virtual Out4 Delay Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.1 s
(11AB)
Sets the minimum ON time for virtual digital output 4.
(0.0 - 25.0 s)
Expert
■ H7-30: Virtual AIn Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-30
Virtual AIn Select Function
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(1177)
Sets the virtual analog input function.
(0 - 32)
Expert
■ H7-31: Virtual AIn Gain
No.
Default
Name
Description
(Hex.)
(Range)
H7-31
Virtual AIn Gain
V/f
OLV OLV/PM AOLV/PM EZOLV
100.0%
(1178)
Sets the virtual analog input gain.
(-999.9 - 999.9%)
RUN
Expert
■ H7-32: Virtual AIn Bias
No.
Default
Name
Description
(Hex.)
(Range)
H7-32
Virtual AIn Bias
V/f
OLV OLV/PM AOLV/PM EZOLV
0.0%
(1179)
Sets the virtual analog input bias.
(-999.9 - 999.9%)
RUN
Expert
■ H7-40: Virtual AOut Enable
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
H7-40
Virtual AOut Enable
1
(1163)
Sets the signal level of the virtual analog output.
(1 - 3)
1 : 0 to 100% (Absolute Value)
2 : -100 to 100%
3 : 0 to 100% (Lower Limit at 0)
■ H7-41: Virtual AOut Select Function
No.
Default
Name
Description
(Hex.)
(Range)
H7-41
Virtual AOut Select
V/f
OLV OLV/PM AOLV/PM EZOLV
102
Function
(1164)
Sets the monitor to be output from the virtual analog output.
(0 - 999)
Set the x-xx part of the Ux-xx [Monitor]. For example, set H7-41 = 102 to monitor U1-02 [Output Frequency].
■ H7-42: Virtual AOut Filter Time
No.
Default
Name
Description
(Hex.)
(Range)
H7-42
Virtual AOut Filter Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.00 s
(1165)
Sets the time constant for a primary filter of the virtual analog output.
(0.00 - 2.00 s)
12
631
12.8 L: PROTECTION
12.8
L: PROTECTION
L parameters set the following functions.
• Motor Overload Protection
• Operation During Momentary Power Loss
• Stall Prevention
• Speed Detection
• Auto Restart
• Detection of Overtorque/Undertorque
• Torque Limit
• Hardware Protection
◆ L1: MOTOR PROTECTION
L1 parameters set the motor overload protection function.
■ Motor Protection Using Positive Temperature Coefficient (PTC) Thermistors
The temperature resistance characteristics of three PTC thermistors in the motor stator winding protect the motor
from overheat.
A PLC thermistor must have the characteristics shown below for each motor phase.
Figure 12.106 PTC Thermistor Temperature and Resistance
If the PTC input signal input to the drive is more than the overload alarm level, the drive detects oH3 [Motor
Overheat (PTC Input)]. The drive continues the operation set in L1-03 [Motor oH AL Reaction Select]. By
default, the keypad shows oH3 and the drive continues operation.
The overheat fault level triggers an oH4 [Motor Overheat Fault (PTC Input)] fault, and outputs a fault signal. The
drive outputs a fault signal and uses the stop method set in L1-04 [Motor oH FLT Reaction Select] to stop the
motor.
Note:
PTC is an acronym for Positive Temperature Coefficient.
■ L1-01: Motor Cool Type for OL1 Calc
No.
Default
Name
Description
(Hex.)
(Range)
L1-01
Motor Cool Type for OL1
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
Calc
(0480)
Sets the motor overload protection with electronic thermal protectors.
(0 - 6)
This parameter enables and disables the motor overload protection with electronic thermal protectors.
The cooling capability of the motor changes when the speed control range of the motor changes. Use an electronic
thermal protector that aligns with the permitted load characteristics of the motor to select motor protection.
The electronic thermal protector of the drive uses these items to calculate motor overload tolerance and supply
overload protection for the motor:
• Output Current
• Output Frequency
632
12.8 L: PROTECTION
• Motor thermal characteristics
• Time characteristics
If the drive detects motor overload, the drive will trigger an oL1 [Motor Overload] and stop the drive output.
Set H2-01 = 4E [NO,NC,CM FuncSelection = Drive PreOH] to set a motor overload alarm. If the motor overload
level is more than 90% of the oL1 detection level, the output terminal activates and triggers an overload alarm.
0 : Disabled
Disable motor protection when motor overload protection is not necessary or when the drive is operating more
than one motor.
Refer to Figure 12.107 for an example of the circuit configuration to connect more than one motor to one drive.
Figure 12.107 Protection Circuit Configuration to Connect More than One Motor to One Drive
NOTICE: When you connect more than one motor to one drive or when the motor amp rating is higher than the drive amp
rating, set L1-01 = 0 [Motor Cool Type for OL1 Calc = Disabled] and install thermal overload relays for each motor. The
electronic thermal protection of the drive will not function and it can cause damage to the motor.
1 : VTorque
Use this setting for general-purpose motors with a 60 Hz base frequency.
The overload tolerance decreases as motor speed decreases because the cooling fan speed decreases and the ability
of the motor to cool decreases in the low speed range.
The overload tolerance characteristics of the motor change the trigger point for the electronic thermal protector.
This provides motor overheat protection from low speed to high speed across the full speed range.
Overload Characteristics
Load Tolerance
Cooling Capability
(at 100% motor load)
This motor is designed to operate with commercial line
If the motor operates at frequencies less than 60 Hz, the
power. Operate at a 60 Hz base frequency to maximize
drive will detect oL1. The drive triggers a fault relay
the motor cooling ability.
output and the motor coasts to stop.
2 : CT 10:1 Speed Range
Use this setting for drive-dedicated motors with a speed range for constant torque of 1:10.
The speed control for this motor is 10% to 100% when at 100% load. Operating slower than 10% speed at 100%
load will cause motor overload.
12
633
12.8 L: PROTECTION
Overload Characteristics
Load Tolerance
Cooling Capability
(at 100% motor load)
This motor is designed to withstand increased
The motor operates continuously at 10% to 100% base
temperatures during continuous operation in the low
frequency. Operating slower than 10% speed at 100%
speed range (10% base frequency).
load will cause motor overload.
3 : CT 100:1 SpeedRange
Use this setting for vector motors with a speed range for constant torque of 1:100.
The speed control for this motor is 1% to 100% when at 100% load. Operating slower than 1% speed at 100%
load will cause motor overload.
Overload Characteristics
Load Tolerance
Cooling Capability
(at 100% motor load)
This motor is designed to withstand increased
The motor operates continuously at 1% to 100% base
temperatures during continuous operation in the low
frequency. Operating slower than 1% speed at 100% load
speed range (1% base frequency).
will cause motor overload.
4 : PM VTorque
Use this setting for PM motors with derated torque characteristics.
The overload tolerance decreases as motor speed decreases because the cooling fan speed decreases and the ability
of the motor to cool decreases in the low speed range.
The overload tolerance characteristics of the motor change the trigger point for the electronic thermal protector.
This provides motor overheat protection from low speed to high speed across the full speed range.
Overload Characteristics
Load Tolerance
Cooling Capability
(at 100% motor load)
This motor is designed to withstand increased
If the motor operates continuously at lower speed than
temperatures during continuous operation at rated speed
rated rotation speed at more than 100% torque, the drive
and rated torque.
will detect oL1. The drive triggers a fault relay output and
the motor coasts to stop.
5 : PM CTorque
Use this setting with a PM motor for constant torque that has a speed range for constant torque of 1:500.
The speed control for this motor is 0.2% to 100% when at 100% load. Operating slower than 0.2% speed at 100%
load will cause motor overload.
634
12.8 L: PROTECTION
Overload Characteristics
Load Tolerance
Cooling Capability
(at 100% motor load)
This motor is designed to withstand increased
The motor operates continuously at 0.2% to 100% rated
temperatures during continuous operation in the low
speed. Operating slower than 0.2% speed at 100% load
speed range (0.2% base frequency).
will cause motor overload.
6 : VT (50Hz)
Use this setting for general-purpose motors with a 50 Hz base frequency.
The overload tolerance decreases as motor speed decreases because the cooling fan speed decreases and the ability
of the motor to cool decreases in the low speed range.
The overload tolerance characteristics of the motor change the trigger point for the electronic thermal protector.
This provides motor overheat protection from low speed to high speed across the full speed range.
Overload Characteristics
Load Tolerance
Cooling Capability
(at 100% motor load)
This motor is designed to operate with commercial line
If the motor operates at frequencies less than commercial
power. Operate at a 50 Hz base frequency to maximize
line power, the drive will detect oL1. The drive triggers a
the motor cooling ability.
fault relay output and the motor coasts to stop.
■ L1-02: OL1 Protect Time
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L1-02
OL1 Protect Time
1.0 min
(0481)
Sets the operation time for the electronic thermal protector of the drive to prevent damage to the
(0.1 - 5.0 min)
motor. Usually it is not necessary to change this setting.
Set the overload tolerance time to the length of time that the motor can operate at 150% load from continuous
operation at 100% load.
When the motor operates at 150% load continuously for 1 minute after continuous operation at 100% load (hot
start), the default setting triggers the electronic thermal protector.
Figure 12.108 shows an example of the electronic thermal protector operation time. Motor overload protection
operates in the range between a cold start and a hot start.
This example shows a general-purpose motor operating at the base frequency with L1-02 set to 1.0 min.
• Cold start
Shows the motor protection operation time characteristics when the overload occurs immediately after starting
operation from a complete stop.
• Hot start
Shows the motor protection operation time characteristics when overload occurs from continuous operation
below the motor rated current.
12
635
12.8 L: PROTECTION
Figure 12.108 Protection Operation Time for a General-purpose Motor at Rated Output Frequency
■ L1-03: Motor oH AL Reaction Select
No.
Default
Name
Description
(Hex.)
(Range)
L1-03
Motor oH AL Reaction
V/f
OLV OLV/PM AOLV/PM EZOLV
3
Select
(0482)
Sets drive operation when the PTC input signal entered into the drive is at the oH3 [Motor
(0 - 3)
Overheat Alarm] detection level.
0 : Ramp->Stop
The drive ramps the motor to stop in the deceleration time. The output terminal set for Fault [H2-01 to H2-03 =
3] activates.
1 : Coast->Stop
The output turns off and the motor coasts to stop. The output terminal set for Fault [H2-01 to H2-03 = 3]
activates.
2 : Fast Stop (C1-09)
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time]. The output terminal set for Fault
[H2-01 to H2-03 = 3] activates.
3 : Alarm Only
The keypad shows oH3 and the drive continues operation. The output terminal set for Alarm [H2-01 to H2-03 =
4] activates.
■ L1-04: Motor oH FLT Reaction Select
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L1-04
Motor oH FLT Reaction
1
Select
(0483)
Sets the drive operation when the PTC input signal to the drive is at the oH4 [Motor Overheat
(0 - 2)
Fault (PTC Input)] detection level.
0 : Ramp->Stop
The drive ramps the motor to stop in the deceleration time. The output terminal set for Fault [H2-01 to H2-03 =
3] activates.
1 : Coast->Stop
The output turns off and the motor coasts to stop. The output terminal set for Fault [H2-01 to H2-03 = 3]
activates.
2 : Fast Stop (C1-09)
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time. The output terminal set for Alarm
[H2-01 to H2-03 = 4] activates.
■ L1-05: Motor Therm.Filter Time
No.
Default
Name
Description
(Hex.)
(Range)
L1-05
Motor Therm.Filter Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.20 s
(0484)
Sets the primary delay time constant for the PTC input signal entered to the drive. This parameter
(0.00 - 10.00 s)
prevents accidental motor overheat faults.
636
12.8 L: PROTECTION
■ L1-08: oL1 Current Level
No.
Default
Name
Description
(Hex.)
(Range)
L1-08
oL1 Current Level
V/f
OLV OLV/PM AOLV/PM EZOLV
0.0 A
(1103)
Sets the reference current for the motor 1 thermal overload detection. When the current level > 0.0
(0.0 A or 10% to 150% of
A, you cannot set this value < 10% of drive rated current.
the drive rated current)
When L1-08 = 0.0 A, the drive uses E2-01 [Mot Rated Current (FLA)] to detect the motor overload protection. In
PM control mode, the drive uses E5-03 [PM Mot Rated Current (FLA)] to detect the motor overload protection.
When L1-08 ≠ 0.0 A, the set value is the reference for motor overload protection.
Note:
• Display is in these units:
-0.01 A: 2001 to 2042, B001 to B018, 4001 to 4023
-0.1 A: 2056 to 2082, 4031 to 4060
• When the current level > 0.0 A, you cannot set this value < 10% of drive rated current.
■ L1-09: M2 oL1 Curr.Level
No.
Default
Name
Description
(Hex.)
(Range)
L1-09
M2 oL1 Curr.Level
V/f
OLV OLV/PM AOLV/PM EZOLV
0.0 A
(1104)
Sets the reference current for the motor 2 thermal overload detection. When the current level > 0.0
(0.0 A or 10 to150% of the
A, you cannot set this value < 10% of drive rated current.
drive rated current)
When L1-09 = 0.0 A, the drive uses E4-01 [M2 Rated Current (FLA)] to detect the motor overload protection.
When L1-09 ≠ 0.0 A, the set value is the reference for motor overload protection.
Note:
• Display is in these units:
-0.01 A: 2001 to 2042, B001 to B018, 4001 to 4023
-0.1 A: 2056 to 2082, 4031 to 4060
• When the current level > 0.0 A, you cannot set this value < 10% of drive rated current.
■ L1-13: Motor oL1 Memory Selection
No.
Default
Name
Description
(Hex.)
(Range)
L1-13
Motor oL1 Memory
V/f
OLV OLV/PM AOLV/PM EZOLV
1
Selection
(046D)
Sets the function that keeps the current electronic thermal protector value when the drive stops
(0, 1)
receiving power.
0 : Disabled
1 : Enabled
Sets if the drive will calculate the motor again when the drive is energized again.
■ L1-22: LeakCurrFil Tim1
No.
Default
Name
Description
(Hex.)
(Range)
L1-22
LeakCurrFil Tim1
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by C6-02
(0768)
Sets the leakage current detection reduction filter time constant during constant speed run.
(0.0 - 60.0 s)
RUN
Note:
You can set this parameter when C6-02 = B [Carrier Frequency Selection = Leakage Current Rejection PWM].
If incorrect detection of alarms, for example oL1 [Motor Overload], occur or errors occur in the values on the
current monitor because of a leakage current, increase the setting value.
■ L1-23: LeakCurrFil Tim2
No.
Default
Name
Description
(Hex.)
(Range)
L1-23
LeakCurrFil Tim2
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by C6-02
(0769)
Sets the leakage current detection reduction filter time constant during acceleration/deceleration.
(0.0 - 60.0 s)
12
RUN
637
12.8 L: PROTECTION
Note:
• You can set this parameter when C6-02 = B [Carrier Frequency Selection = Leakage Current Rejection PWM].
• When the setting value increases, the current monitor also starts up slowly. Examine the relevant sequence for problems.
If errors occur in the values on the current monitor during acceleration/deceleration, increase the setting value.
◆ L2: POWER LOSS RIDE THROUGH
L2 parameters set the drive operation during momentary power loss and the KEB Ride-Thru function method of
operation.
■ KEB Ride-Thru Function
KEB is an acronym for Kinetic Energy Backup. If the drive detects a power loss or momentary power loss, it will
quickly decelerate the motor. The drive uses regenerative energy from the motor to keep the main circuit
operating. When you return power during motor deceleration, the drive returns operation to the status before the
power loss. The KEB Ride-Thru function is different than other functions for continuous operation. If the drive
detects momentary power loss, the motor will ramp to stop. It will not coast to stop. This function is applicable for
applications in which it is necessary to prevent materials from running out, for example control for film and fiber
lines.
The KEB Ride-Thru function has 4 methods of operation. Parameter L2-29 [KEB Method] sets the method.
When you use the KEB Ride-Thru function with one drive, set L2-29 = 1, 2 [Single KEB1 Ride-Thru, Single
KEB2 Ride-Thru].
If deceleration in coordination with more than one drive is necessary, for example textile machinery line systems,
set L2-29 = 3, 4 [System KEB1 Ride-Thru, System KEB2 Ride-Thru].
Table 12.49 KEB Ride-Thru Function Operation Method
Kinetic Energy
L2-29
Operation
Configuration Precautions
Backup Method
0
Single Drive KEB
The drive uses regenerative energy from the motor to keep the DC bus
• Set C1-09 correctly to prevent Uv1 [DC Bus Undervoltage] and ov
Ride-Thru 1
voltage at the level set in L2-11 [KEB DC Volt Setpoint] while it
[Overvoltage].
adjusts the rate of deceleration.
• If the drive detects Uv1 during the KEB operation, decrease the
The KEB operation continues while the drive adjusts the deceleration
value set in C1-09.
rate with the setting of C1-09 [Fast Stop Time].
• If the drive detects ov during the KEB operation, increase the value
set in C1-09.
1
Single Drive KEB
The drive uses information about the inertia of the connected
• If the drive detects Uv1 during the KEB operation, increase the
Ride-Thru 2
machinery to find the deceleration rate necessary to keep the DC bus
setting value of L3-20 [DCBus VoltAdj Gain] and L3-21 [OVSup
voltage at the level set in parameter L2-11.
Acc/Dec Gain].
The drive uses system inertia to calculate the deceleration time. You
• If the drive detects ov during the KEB operation, decrease the
cannot adjust this value.
setting values of L3-20 and L3-21.
2
System KEB Ride-
The drive does not monitor the DC bus voltage. The drive decelerates
Use the dynamic braking option with System KEB Ride-Thru 1.
Thru 1
at the KEB deceleration time set in L2-06.
Use L2-06 to set the time necessary to decelerate from the current
frequency reference to 0 Hz. More than one drive can decelerate and
keep a constant speed ratio between drives.
3
System KEB Ride-
The drive uses the KEB deceleration time set in L2-06 to decelerate
If you cannot use the dynamic braking option, use System KEB Ride-
Thru 2
and it also monitors the DC bus voltage.
Thru 2.
If the voltage level increases, the drive momentarily holds the
frequency to prevent an ov before it continues to decelerate.
■ KEB Ride Thru Start
When L2-01 = 1 [RideThru@PwrLoss = Enabled] and L2-50 = 2, 3, 4 [KEB Mode, KEB Stop Mode, KEB Decel
to Stop], the drive starts the KEB operation immediately after it detects a momentary power loss. When one of
these conditions occur, the drive will activate KEB Ride-Thru:
• KEB Ride-Thru 1 set for the MFDI terminal becomes enabled (terminal is deactivated when H1-xx = 40 or
terminal is activated when H1-xx = 41).
The drive uses the mode selected L2-29 [KEB Method] to start KEB operation.
• KEB Ride-Thru 2 set for the MFDI terminal becomes enabled (terminal is deactivated when H1-xx = 42 or
terminal is activated when H1-xx = 43).
The drive automatically starts Single KEB Ride-Thru 2 and it ignores the setting of L2-29.
• The DC bus voltage is less than the level set in L2-05 [UV Detection Lvl (Uv1)].
The KEB operation will start as specified in L2-29.
Note:
If you try to set KEB Ride-Thru 1 and 2 to the MFDI terminals at the same time, it will trigger oPE03 [Multi-Function Input Setting
Err].
638
12.8 L: PROTECTION
n this example, the drive detects that the DC bus voltage is less than the level set in L2-05 and starts the KEB
operation. When you return power during KEB operation, the drive will continue KEB operation when the KEB
Ride-Thru is input, although the time set in L2-10 [Minimum KEB Time] expired. The motor accelerates again
after you cancel the KEB Ride-Thru.
Figure 12.109 KEB Operation through KEB Ride-Thru Input
■ KEB Ride-Thru End Detection
Parameter L2-01 [RideThru@PwrLoss] and a digital input programmed for KEB set the KEB function end
detection.
Use the Momentary Power Loss Ride-Thru Time to Cancel KEB Operation
The following figure shows an example with this configuration:
• L2-01 = 1 [Enabled] and L2-50 = 2 [RidThruMode@PwrLoss = KEB Mode] is set.
• KEB Ride-Thru is not used.
The drive starts deceleration through KEB operation. When the time set in L2-10 [Minimum KEB Time] expires,
the drive stops the KEB operation and then it accelerates the motor again until it is at the frequency reference
value used before the power loss.
If you do not return the DC bus voltage in the time set in L2-02 [RideThrough Time@Power Loss], the drive
detects Uv1 [DC Bus Undervoltage] and the drive turns off its output.
Figure 12.110 Cancel the KEB Operation after the Momentary Power Loss Ride-Thru Time Is Expired without KEB
Ride-Thru
*1
When L2-07 = 0.00 [KEB Accel Time = 0.00 s], the drive accelerates again as specified by the applicable
Acceleration Time [C1-01, C1-03, C1-05, C1-07], and usual operation continues.
Use the Momentary Power Loss Ride-Thru Time and KEB Ride-Thru to Cancel KEB Operation
The following figure shows an example with this configuration:
• L2-01 = 1 [Enabled] and L2-50 = 2 [KEB Mode].
12
• Use KEB Ride-Thru 1 [H1-xx = 40, 41] or KEB Ride-Thru 2 [H1-xx = 42, 43].
639
12.8 L: PROTECTION
The drive starts deceleration through KEB operation. The drive decelerates for the time set in parameter L2-10,
then it measures the DC bus voltage and the status of the digital input terminal set for KEB Ride-Thru. When the
DC bus voltage is less than the level set in L2-11 [KEB DC Volt Setpoint], or if the KEB digital input is active,
KEB deceleration continues. When the DC bus voltage is more than the level set in L2-11, the drive ends KEB
operation. The drive accelerates the motor to the frequency reference value before the power loss, and usual
operation continues. If the time set in L2-02 is expired, the drive detects Uv1. When you cancel the KEB Ride-
Thru, the motor accelerates again, and usual operation continues.
Figure 12.111 Use the Momentary Power Loss Ride-Thru Time and KEB Ride-Thru to Cancel KEB Operation
*1
When L2-07 = 0.00, the drive accelerates again as specified by the applicable Acceleration Time [C1-01,
C1-03, C1-05, C1-07], and usual operation continues.
Cancel KEB Operation When Restoration of Power Occurs while the Control Power (Power Supply to the
Control Board) is Maintained
The following figure shows an example with this configuration:
• L2-01 = 1, and L2-50 = 3 [KEB Stop Mode] is set.
• KEB Ride-Thru is not used.
The drive starts deceleration through KEB operation. The drive decelerates for the time set in parameter L2-10,
and then measures the DC bus voltage level. When the DC bus voltage is lower than the level set in L2-11, the
drive uses the KEB Ride-Thru function to continue deceleration. When the DC bus voltage is more than the level
set in L2-11, usual operation continues. The drive accelerates the motor to the frequency reference value before
the power loss, and usual operation continues.
Figure 12.112 Cancel KEB Operation without Using the KEB Ride-Thru if Restoration of Power Occurs while the
Control Power (Power Supply to the Control Board) is Maintained
*1
When L2-07 = 0.00 s, the drive accelerates again as specified by the applicable Acceleration Time [C1-01,
C1-03, C1-05, C1-07], and usual operation continues.
Use the KEB Ride-Thru to Cancel KEB Operation when Restoration of Power Occurs while the Control
Power (Power Supply to the Control Board) is Maintained
The following figure shows an example with this configuration:
• L2-01 = 1, and L2-50 = 1 [While CPU Active].
640
12.8 L: PROTECTION
• Use KEB Ride-Thru 1 [H1-xx = 40, 41] or KEB Ride-Thru 2 [H1-xx = 42, 43].
The drive starts deceleration through KEB operation. When the motor decelerates for the time set in L2-10, the
drive measures the DC bus voltage and the status of the digital input set for KEB Ride-Thru. When the DC bus
voltage is less than the level set in L2-11, or if the digital input set to KEB Ride-Thru is active, deceleration
continues. When the DC bus voltage is more than the level set in L2-11, the drive ends KEB operation. The drive
accelerates the motor to the frequency reference value before the power loss, and usual operation continues. When
the KEB Ride-Thru continues to be input after the time set in L2-02 is expired, the drive uses the KEB Ride-Thru
function to continue to decelerate. When you cancel the KEB Ride-Thru, the motor accelerates again, and usual
operation continues.
Figure 12.113 Use the KEB Ride-Thru to Cancel KEB Operation when Restoration of Power Occurs while the Control
Power (Power Supply to the Control Board) is Maintained
*1
When L2-07 = 0.00 s, the drive accelerates again as specified by the applicable Acceleration Time [C1-01,
C1-03, C1-05, C1-07], and usual operation continues.
KEB Operation when L2-01 = 1, and L2-50 = 4 [KEB Decel to Stop]
The drive starts deceleration through KEB operation. If you do not input the Run command, the motor cannot
restart. The drive will continue to decelerate until the motor comes to the minimum output frequency or a
complete stop. If you return power during deceleration, the drive continues to decelerate.
■ KEB Operation Wiring Example
Figure 12.114 shows an example that uses an undervoltage relay to trigger the KEB Ride-Thru at power loss.
When a power loss occurs, the undervoltage relay triggers KEB Ride-Thru [H1-06 = 40, 41, 42, 43] at terminal
DI6.
Note:
• Configure the drive to turn ON the Run command while the KEB function is operating. If you turn off the Run command, the drive will
not accelerate back to speed when you return power.
•A dynamic braking option is necessary for System KEB1 Ride-Thru [L2-29 = 3]..
12
641
12.8 L: PROTECTION
Figure 12.114 KEB Function Wiring Example
■ Parameters for KEB Ride-Thru
This table shows the parameters that adjust the KEB Ride-Thru function. Parameter settings are different for the
different KEB methods set in L2-29 [KEB Method].
Table 12.50 Parameters for KEB Ride-Thru
L2-29 [Kinetic Energy Backup Method]
No.
Name
Configuring Settings
0
1
2
3
C1-09
Fast Stop Time
• If ov [Overvoltage] occurs during KEB deceleration, increase the setting value.
• If Uv1 [DC Bus Undervoltage] occurs during KEB deceleration, decrease the
x *1
-
-
-
setting value.
C2-03
Jerk@Start of Decel
• If ov occurs immediately after you start KEB deceleration, increase the setting
value.
x
-
x
x
• If Uv1 occurs immediately after you start KEB deceleration, decrease the
setting value.
L2-05
UV Detection Lvl (Uv1)
If Uv1 occurs immediately after you start KEB deceleration, increase the setting
x
x
x
x
value to detect power loss more quickly.
L2-06
KEB Decel Time
• Kinetic Energy Backup Decel Time
• If ov or Uv1 occur during KEB deceleration after KEB Tuning, set L2-06 in
these conditions:
-
-
x *2
x *2
- If ov occurs, increase the setting value
– If Uv1 occurs, decrease the setting value.
L2-07
KEB Accel Time
Sets the acceleration time to return to the frequency reference value before a
power loss, after you cancel the KEB operation. When L2-07 = 0, the drive uses
x
x
x
x
the standard acceleration times set in C1-01, C1-03, C1-05, and C1-07
[Acceleration Time].
L2-08
Frq.Gain@KEB Start
• If ov occurs immediately after you start operation, decrease the setting value.
x
-
x
x
• If Uv1 occurs immediately after you start operation, increase the setting value.
L2-10
Minimum KEB Time
• With KEB Ride-Thru
There is Uv1 because you set a digital input for KEB Ride-Thru and the device
that controls the input operated too slowly after power loss.
x
x
x
x
• Without KEB Ride-Thru
If the DC bus voltage overshoots immediately after KEB Ride-Thru starts,
increase L2-10 to longer than the overshoot.
L2-11
KEB DC Volt Setpoint
• Single Drive KEB Ride-Thru 2
Set to approximately 1.22 x input voltage.
• Single Drive KEB Ride-Thru 1, System KEB Ride-Thru 1, or System KEB
x
x
x
x
Ride-Thru 2
Set to approximately 1.4 x input voltage.
L3-20
DCBus VoltAdj Gain
• If ov or Uv1 occurs at the start of deceleration when you use KEB operation,
increase this value in 0.1-unit increments.
-
x
-
-
• If there is torque ripple during deceleration when you use KEB Ride-Thru,
decrease the value.
L3-21
OVSup Acc/Dec Gain
If there is large speed or current ripple, decrease the value in 0.05 unit increments.
Note:
-
x
-
-
If the setting value is too low, then the drive will have unsatisfactory DC bus
voltage control response. The drive can detect ov or Uv1.
642
12.8 L: PROTECTION
L2-29 [Kinetic Energy Backup Method]
No.
Name
Configuring Settings
0
1
2
3
L3-24
Acc@Rated Torque
Set the motor acceleration time to the maximum frequency at the motor rated
-
x
-
-
torque.
L3-25
Load Inertia Ratio
Sets the ratio between motor inertia and machine inertia.
-
x *3
-
-
*1
When L2-29 = 1 [KEB Method = Single KEB1 Ride-Thru] and you do KEB Auto-Tuning, the drive will automatically set C1-09. If
you must not change the Fast Stop time, do not do KEB Tuning.
*2
If you do KEB Tuning when L2-29 = 2, 3, or 4 [KEB Method = Single KEB2 Ride-Thru, System KEB1 Ride-Thru, or System KEB2
Ride-Thru], the drive will automatically set L2-06 [KEB Decel Time].
*3
The drive sets this value automatically when KEB Tuning completes correctly.
■ L2-01: RideThru@PwrLoss
No.
Default
Name
Description
(Hex.)
(Range)
L2-01
RideThru@PwrLoss
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(0485)
Sets the drive operation after a momentary power loss.
(0, 1)
The drive detects momentary power loss when the drive DC bus voltage is less than the value set in L2-05 [UV
Detection Lvl (Uv1)].
0 : Disabled
1 : Enabled
This mode is defined using L2-50 [RidThruMode@PwrLoss].
Note:
When you set L2-01 and L2-50, make sure that you know these items:
• You can use a Momentary Power Loss Unit on models 2001 to 2042 and 4001 to 4023 for a longer momentary power loss ride through
time. A Momentary Power Loss Unit makes it possible to continue operation of the drive after a maximum of 2 seconds of power loss.
• When you set L2-01 = 1 and L2-50 = 0 to 3, keep the magnetic contactor on the drive input side ON and keep the control signal while
the drive does KEB operation.
• When L2-01 = 1 and L2-50 = 1 to 4, Uv [DC Bus Undervoltage] will flash on the keypad while the drive is attempting to recover from
a momentary power loss. The drive will not output a fault signal at this time.
• When you use a magnetic contactor between the motor and the drive, keep the magnetic contactor closed while the drive does KEB
operation or tries to restart with Speed Search.
• Keep the Run command active during KEB operation. The drive cannot accelerate back to the frequency reference when the power
returns.
• When L2-01 = 1 and L2-50 = 2 to 4, if the control power supply voltage is less than the CPU operation level during KEB Ride-Thru, it
will trigger Uv1.
■ L2-02: RideThrough Time@Power Loss
No.
Default
Name
Description
(Hex.)
(Range)
L2-02
RideThrough Time@Power
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by o2-04, C6-
Loss
01
(0486)
Sets the maximum time that the drive will wait until trying to restart after power loss.
(0.0 - 25.5 s)
This function is applicable when L2-01 = 1 [RideThru@PwrLoss = Enabled] and L2-50 = 0, 2
[RidThruMode@PwrLoss = Timer Controlled, KEB Mode]. If power loss operation is longer than the time set in
this parameter, the drive will detect Uv1 [DC Bus Undervoltage], turn OFF output, and the motor will coast to
stop.
Note:
• The length of time that the drive can recover after a power loss changes when drive capacity changes.
• The upper limit of the possible momentary power loss Ride-Thru time changes when drive capacity changes.
■ L2-03: Min Baseblck Time
No.
Default
Name
Description
(Hex.)
(Range)
L2-03
Min Baseblck Time
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by o2-04, C6-
01
(0487)
Sets the minimum time to continue the drive output block (baseblock) after a baseblock.
(0.1 - 5.0 s)
12
Sets the length of time that the drive will wait for the residual voltage in the motor to dissipate in estimation to the
secondary circuit time constant of the motor. If oC [Overcurrent] or ov [DC Bus Overvoltage] occur at the start of
Speed Search, after power returns, or during DC Injection Braking, increase this setting.
643
12.8 L: PROTECTION
■ L2-04: Powloss Ramp Time@recovery
No.
Default
Name
Description
(Hex.)
(Range)
L2-04
Powloss Ramp
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by o2-04, C6-
Time@recovery
01
(0488)
Sets the time for the drive output voltage to go back to correct voltage after completing speed
searches.
(0.0 - 5.0 s)
Sets the time for voltage to recover from 0 V to the value set in E1-05 [Max Output Voltage].
■ L2-05: UV Detection Lvl (Uv1)
No.
Default
Name
Description
(Hex.)
(Range)
L2-05
UV Detection Lvl (Uv1)
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by o2-04 and
E1-01
(0489)
Sets the voltage at which a Uv1 [DC Bus Undervoltage] fault is triggered or at which the KEB
function is activated. Usually it is not necessary to change this setting.
(200 V Class: 150 - 210 V,
400 V Class: 300 - 420 V)
NOTICE: Damage to Equipment. When you set this parameter to a value lower than the default, you must install an AC reactor
on the input side of the power supply. If you do not install an AC reactor, it will cause damage to the drive circuitry.
Note:
If the low voltage detection level is near the lower limit value of L2-05, the drive will detect Uv1 during KEB Ride-Thru operation. Do
not set the value too low when you use the KEB Ride-Thru function.
■ L2-06: KEB Decel Time
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L2-06
KEB Decel Time
0.0 s
(048A)
Sets the deceleration time during KEB operation used to decrease the maximum output frequency
(0.0 - 6000.0 s)
to 0.
Expert
Set L2-29 = 3 or 4 [KEB Method = System KEB1 Ride-Thru or System KEB2 Ride-Thru] to enable this function.
When L2-29 = 2 , 3, 4 [Single KEB2 Ride-Thru, System KEB1 Ride-Thru, System KEB2 Ride-Thru] and you do
KEB Auto-Tuning, the drive will automatically set this value.
Sets the deceleration time necessary to decelerate from the frequency reference to 0 Hz when the drive detects a
momentary power loss. If a Uv1 [DC Bus Undervoltage] fault occurs during KEB operation, decrease the
deceleration time. If an ov [Overvoltage] fault occurs, increase the deceleration time.
• L2-06 = 0
The drive automatically decreases C1-09 [Fast Stop Time] to the base value to keep the DC bus voltage above
the low voltage detection level. The drive ignores L2-02 [RideThrough Time@Power Loss] in this condition.
• L2-06 ≠ 0
As shown in Figure 12.115, the frequency reference decelerates to the KEB frequency level as specified by the
deceleration rate set in L2-06 and then returns to the initial frequency reference as specified by C1-01 [Accel
Time 1]. The drive uses the setting value of the KEB frequency rate as shown in the this formula to set the KEB
frequency level:
KEB frequency level = Output frequency before power loss × (1 - (L2-02)/(L2-06))
Figure 12.115 Kinetic Energy Backup Decel Time
644
12.8 L: PROTECTION
■ L2-07: KEB Accel Time
No.
Default
Name
Description
(Hex.)
(Range)
L2-07
KEB Accel Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.0 s
(048B)
Sets the acceleration time to return the frequency to the frequency reference before a power loss
(0.0 - 6000.0 s)
after canceling KEB operation.
Expert
Set this parameter to 0.0 to disable the function. The drive uses the acceleration time in C1-01, C1-03, C1-05, and
C1-07 to accelerate again after KEB operation completes.
■ L2-08: Frq.Gain@KEB Start
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L2-08
Frq.Gain@KEB Start
100%
(048C)
Sets the quantity of output frequency reduction used when KEB operation starts as a percentage
(0 - 300%)
of the motor rated slip before starting KEB operation.
Expert
Decreases the output frequency in steps to quickly set the motor to a regenerative condition. Use this formula to
calculate the value:
Output frequency reduction = Motor rated slip before KEB operation × (L2-08/100) × 2
■ L2-09: KEB Min.Frq Level
No.
Default
Name
Description
(Hex.)
(Range)
L2-09
KEB Min.Frq Level
V/f
OLV OLV/PM AOLV/PM EZOLV
20%
(048D)
Sets the quantity of output frequency reduction used as a percentage of E2-02 [Mot Rated Slip]
(0 - 100%)
when KEB operation starts.
Expert
These conditions set the quantity of decrease:
• Motor rated slip × (L2-09/100)
• The larger value between the value calculated with L2-08 and the value calculated with L2-09
■ L2-10: Minimum KEB Time
No.
Default
Name
Description
(Hex.)
(Range)
L2-10
Minimum KEB Time
V/f
OLV OLV/PM AOLV/PM EZOLV
50 ms
(048E)
Sets the minimum length of time to operate the KEB after the drive detects a momentary power
(0 - 25500 ms)
loss.
Expert
When you return power while KEB is operating, the drive continues KEB operation until the time set in L2-10 is
expired. When the DC bus voltage is less than the level of L2-05 [UV Detection Lvl (Uv1)] in one of these
conditions, KEB operation continues until the time set in L2-10 is expired:
• L2-01 = 1 and L2-50 = 2 [RideThru@PwrLoss = Enabled] and [RidThruMode@PwrLoss = KEB Mode].
• L2-01 = 1 and L2-50 = 3 [KEB Stop Mode]
• L2-01 = 1 and L2-50 = 4 [KEB Decel to Stop].
• KEB Ride-Thru 1/2 [H1-xx = 40, 41, 42, or 43] is input into the drive.
When you input KEB Ride-Thru, KEB operation continues after the time set in L2-10 is expired. When you
cancel KEB Ride-Thru, the motor accelerates again. When you do not input KEB Ride-Thru during the time set in
L2-10, the drive accelerates to the frequency reference that the drive had before power loss in the applicable
acceleration time.
When L2-01 = 1 and L2-50 = 2, 3, or 4, and the DC bus voltage is a minimum of the value of L2-11 [KEB DC
Volt Setpoint], the drive accelerates again after the time set in L2-10 is expired. If the DC bus voltage is less than
the L2-11 value, KEB operation continues after the time set in L2-10 is expired.
Note:
• When L2-01 = 0 [Disabled], or L2-01 = 1 and L2-50 = 0 or 1 [Timer Controlled or While CPU Active], increase the value of L2-10.
Set L2-10 to cancel KEB operation if the KEB Ride-Thru is not input
• Set this parameter to 0 to disable the function.
12
645
12.8 L: PROTECTION
■ L2-11: KEB DC Volt Setpoint
No.
Default
Name
Description
(Hex.)
(Range)
L2-11
KEB DC Volt Setpoint
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by E1-01
(0461)
Sets the target value that controls the DC bus voltage to a constant level in Single Drive KEB
(Determined by E1-01)
Ride-Thru 2. Sets the DC bus voltage level that completes the KEB operation for all other KEB
Expert
methods.
■ L2-29: KEB Method
No.
Default
Name
Description
(Hex.)
(Range)
L2-29
KEB Method
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(0475)
Sets the KEB function operation mode.
(1 - 4)
Expert
Set L2-01 = 1 [RideThru@PwrLoss = Enabled], and L2-50 = 2, 3, or 4 [RidThruMode@PwrLoss = KEB Mode,
KEB Stop Mode, KEB Decel to Stop] or KEB Ride-Thru 1/2 [H1-xx = 40, 41, 42, or 43], to enable the KEB
function.
1 : Single KEB1 Ride-Thru
The drive monitors the DC bus voltage and uses regenerative energy from the motor to hold the DC bus voltage at
the level set in L2-11 [KEB DC Volt Setpoint].
The KEB operation continues and the deceleration rate changes as specified by C1-09 [Fast Stop Time].
Note:
• If the drive detects Uv1 [DC Bus Undervoltage] during KEB operation, decrease the value of C1-09.
• If the drive detects ov [Overvoltage] during KEB operation, increase the value of C1-09.
2 : Single KEB2 Ride-Thru
The drive does KEB operation and automatically calculates the deceleration rate to make sure that the main circuit
electrical energy and main current voltage from motor regenerative energy is equal to L2-11 [KEB DC Volt
Setpoint].
3 : System KEB1 Ride-Thru
The drive does not monitor the DC bus voltage and decelerates as specified by the KEB deceleration time set in
L2-06.
Set L2-06 to the time necessary to decelerate from the frequency reference to 0 Hz when the drive detects a
momentary power loss. The drive can decelerate and keep constant deceleration rates for more than one drive.
Note:
If you keep constant deceleration rates for more than one drive, it can trigger ov faults. Use the dynamic braking option with System
KEB Ride-Thru 1 to prevent ov faults.
4 : System KEB2 Ride-Thru
The drive monitors the DC bus voltage and decelerates for the deceleration time set in L2-06.
If the DC bus voltage increases, the drive momentarily holds the frequency to prevent ov while deceleration
continues.
Note:
When you cannot use a dynamic braking option, use System KEB Ride-Thru.
■ L2-30: KEB ZeroSpeed Operation
No.
Default
Name
Description
(Hex.)
(Range)
L2-30
KEB ZeroSpeed Operation
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(045E)
Sets the operation when the output frequency decreases below the zero level (DC braking
(1, 2)
injection starting frequency) during KEB deceleration when L2-01 = 1 [RideThru@PwrLoss =
Expert
Enabled] and L2-50 = 2 to 4 [RidThruMode@PwrLoss = KEB ModeKEB Stop Mode, or KEB
Decel to Stop].
1 : Baseblock
2 : DC/SC Braking
Does DC injection braking and short circuit braking as specified by b2-04 [DCInj Time@Stop] and b2-13 [SCB
Time@Stop].
646
12.8 L: PROTECTION
■ L2-31: KEB StartV Offset Level
No.
Default
Name
Description
(Hex.)
(Range)
L2-31
KEB StartV Offset Level
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(045D)
Sets the KEB start voltage offset.
(200 V Class: 0 - 100 V,400
V Class: 0 - 200 V)
Expert
The drive uses this formula to calculate the KEB start voltage:
KEB start voltage = L2-05 [UV Detection Lvl (Uv1)] + L2-31
■ L2-50 RidThruMode@PwrLoss
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L2-50
RidThruMode@PwrLoss
0
(0453)
Sets the drive operation after a momentary power loss..
(0 - 4)
Expert
0 : Timer Controlled
When power returns in the time set in L2-02 [RideThrough Time@Power Loss], the drive will restart. If power
does not return in the time set in L2-02, the drive will detect Uv1.
The drive momentarily turns OFF its output after a power loss. If the power returns in the time set to L2-02, the
drive will do Speed Search and try to continue operation.
If the DC bus voltage is less than or equal to the Uv1 detection level for the time set in L2-02, the drive will detect
Uv1 and output a fault signal.
Note:
• The necessary time for the drive to restart after power returns is different for different drive capacities.
• The upper limit of the possible momentary power loss Ride-Thru time is different for different drive models.
1 : While CPU Active
When power returns and the drive control circuit has power, the drive will restart. This will not trigger Uv1.
When there is a momentary power loss, the drive output will turn OFF. If the power returns and the drive control
circuit has power, the drive will do Speed Search and try to continue operation. This will not trigger Uv1. This
function lets the power loss be longer than when L2-01 = 1.
2 : KEB Mode
If power does not return in the time set in L2-02, the drive will detect Uv1.
When the drive detects momentary power loss, the drive will use regenerative energy from the motor through
KEB operation to decelerate. When you return power in the time set in L2-02, the drive will accelerate to the
frequency reference value that was used before the power loss. If you do not return power in the time set to L2-02,
the drive will detect Uv1 and the drive output will turn OFF. L2-29 [KEB Method] sets the type of KEB operation.
3 : KEB Stop Mode
When power returns and the drive control circuit has power, the drive will restart.
The drive decelerates using regenerative energy from the motor until the power returns and then restarts when a
momentary power loss is detected. When power is restored during deceleration, the drive accelerates the motor
again to the frequency reference value used before the power loss. If the motor comes to a stop before the power
returns, the drive loses control power and the drive output shuts off. A Uv1 is not triggered when power is restored
while power to the CPU in the drive is maintained. The type of KEB operation is determined by L2-29.
4 : KEB Decel to Stop
When power returns, the drive will continue to decelerate until the motor fully stops.
If the drive detects momentary power loss, the drive will use regenerative energy from the motor and ramp to
stop. When you return power to the drive, the drive will continue to decelerate until the motor comes to a full
stop. After you return power, the drive will ramp to stop in the set deceleration time. L2-29 sets the type of KEB
operation.
12
647
12.8 L: PROTECTION
Note:
When you set L2-01 and L2-50, make sure that you know these items:
• You can use a Momentary Power Loss Unit on models 2004 to 2056 and 4002 to 4031 for a longer momentary power loss ride through
time. A Momentary Power Loss Unit makes it possible to continue operation of the drive after a maximum of 2 seconds of power loss.
• When you set L2-01 = 1 and L2-50 = 0 to 3, keep the magnetic contactor between the motor and the drive closed and keep the control
signal while the drive does KEB operation.
• When you set L2-01 = 1 and L2-50 = 1 to 4, Uv [Undervoltage] will flash on the keypad while the drive tries to recover from a
momentary power loss. The drive will not output a fault signal at this time.
• When you use a magnetic contactor between the motor and the drive, keep the magnetic contactor closed while the drive does KEB
operation or tries to restart with Speed Search.
• Keep the Run command active during KEB operation. The drive cannot accelerate back to the frequency reference when the power
returns.
• When you set L2-01 = 1 and L2-50 = 2 to 4, if the control power supply voltage is less than the CPU operation level during KEB Ride-
Thru, it will trigger Uv1.
◆ L3: STALL PREVENTION
L3 parameters set the Stall Prevention function and overvoltage suppression function.
■ Stall Prevention
If the load is too heavy or the acceleration and deceleration times are too short, the motor can slip too much
because it cannot work at the same rate as the frequency reference. If the motor stalls during acceleration, current
increases as the slip increases to cause an oC [Overcurrent], oL2 [Drive Overload], or oL1 [Motor Overload] and
the drive will stop. If the motor stalls during deceleration, too much regenerative power will flow back into the
DC bus capacitors, and cause the drive to fault out from ov [Overvoltage] and the drive will stop.
The stall prevention function will let the motor get to the set speed without stalling and it is not necessary for you
to change the acceleration or deceleration time settings. You can set a separate stall prevention functions for
acceleration, operating at constant speeds, and deceleration.
■ Overvoltage Suppression Function
Decreases the regenerative torque limit and increases the output frequency when the DC bus voltage increases to
prevent ov. This function can drive loads with cyclic regenerative operation, for example punch presses or other
applications with repeated crank movements. When you use this function, set L3-11 = 1 [Overvolt Supression
Select = Enabled].
The drive adjusts the regenerative torque limit and the output frequency during overvoltage suppression to make
sure that the DC bus voltage is not more than the level set in L3-17 [DCBus Regul.Level].
Set these parameters as necessary when you use the overvoltage suppression function:
• L3-20 [DCBus VoltAdj Gain]
• L3-21 [OVSup Acc/Dec Gain]
• L3-24 [Acc@Rated Torque]
• L3-25 [Load Inertia Ratio]
Note:
• When overvoltage suppression is triggered, the motor speed is more than the frequency reference. Do not use overvoltage suppression
for applications where the frequency reference and the motor speed must align.
• When you use a braking resistor, set L3-11 = 0 [Disabled].
• The overvoltage suppression function is enabled only when you operate immediately below the maximum frequency. Overvoltage
suppression does not increase the output frequency to more than the maximum frequency. Make sure that the motor and machine
specifications are correct for the application, then increase the maximum frequency.
• If there is a sudden increase to a regenerative load, ov can occur.
■ L3-01: StallP Mode@Accel
No.
Default
Name
Description
(Hex.)
(Range)
L3-01
StallP Mode@Accel
V/f
OLV OLV/PM AOLV/PM EZOLV
2
(048F)
Sets the method of the Stall Prevention During Acceleration.
(1 - 4)
Note:
When A1-02 = 5 [Control Method = PM OLVector], the setting range is 0 and 1.
648
12.8 L: PROTECTION
Stall prevention during acceleration prevents the stalling and stopping of motors when oC [Overcurrent], oL2
[Drive Overloaded], or oL1 [Motor Overload] is detected in cases of significant loads applied during acceleration
or sudden acceleration times regarding load inertia are set.
1 : Disabled
The Stall Prevention function does not operate during acceleration, and acceleration occurs for the set acceleration
time. If the acceleration time is too short, the motor will not fully accelerate during the set time, which causes the
drive to detect oL1 or oL2 and the motor to stop.
2 : General Purpose
Enables the Stall Prevention During Acceleration function. Operation is different for different control methods.
• V/f Control, Open Loop Vector Control, or EZ Open Loop Vector Control
When the output current is more than the value set in L3-02 [StallP Level@Accel], the drive stops acceleration.
Deceleration is stopped once the output current falls below the value set in L3-02 - 15%. The Stall Prevention
function level automatically falls for constant output ranges.
Figure 12.116 Stall Prevention During Acceleration when Using Induction Motors
• Open Loop Vector Control for PM
When the output current is more than the value set in L3-02, the drive stops acceleration. When the time set in
L3-27 [StallP Detect Time] is expired and the output current is larger than in L3-02, the drive will start
deceleration in as specified by L3-22 [StallP@Acc Deceleration Time]. The drive starts acceleration again once
the output current falls below the value set in L3-02 - 15%. When the time set in L3-27 is expired, the drive
starts acceleration again.
Figure 12.117 Stall Prevention During Acceleration Function in OLV/PM
3 : Intelligent Accel
12
The drive ignores the acceleration time setting and the drive starts to accelerate in the minimum length of time.
The drive automatically adjusts the acceleration rate to make sure that the output current is not more than L3-02.
649
12.8 L: PROTECTION
4 : ILim Mode
This function uses the L3-02 value to limit the output current and automatically adjusts the acceleration rate.
When the load (output current) increases to more than the current limit level during acceleration, the drive
automatically adjusts the acceleration rate.
Figure 12.118 Current Limit Acceleration
■ L3-02: StallP Level@Accel
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L3-02
StallP Level@Accel
Determined by C6-01 and
L8-38
(0490)
Sets the output current level at which the Stall Prevention function operates during acceleration
where the drive rated output current is 100%.
(0 - 150%)
Note:
• If you use a motor that is small compared to the drive and the motor stalls, decrease the setting value.
• When you operate the motor in the constant power range, set L3-03 [StallP Limit@Accel].
• The upper limit to the setting range changes when the setting for C6-01 [ND/HD Duty Selection] changes.
- 150% when C6-01 = 0 [HD Rating]
- 120% when C6-01 = 1 [ND Rating]
■ L3-03: StallP Limit@Accel
No.
Default
Name
Description
(Hex.)
(Range)
L3-03
StallP Limit@Accel
V/f
OLV OLV/PM AOLV/PM EZOLV
50%
(0491)
Sets the lower limit for the stall prevention level used in the constant output range as a percentage
(0 - 100%)
of the drive rated output current.
The stall prevention level set in L3-02 [StallP Level@Accel] is automatically reduced when the motor is running
within the constant output range. Parameter L3-03 is the limit value used to prevent the stall prevention level
during constant output ranges to fall below the minimum required level.
Note:
The function to automatically reduce the stall prevention level does not operate when L3-01 = 4 [StallP Mode@Accel = ILim Mode].
Figure 12.119 Stall Prevent Level during Accel/Limit
■ L3-04: StallP@Decel Enable
No.
Default
Name
Description
(Hex.)
(Range)
L3-04
StallP@Decel Enable
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(0492)
Enables Stall Prevention during deceleration.
(0, 1)
650
12.8 L: PROTECTION
0 : Disabled
1 : Enabled
■ L3-05: StallP@RUN Enable
No.
Default
Name
Description
(Hex.)
(Range)
L3-05
StallP@RUN Enable
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(0493)
Enables Stall Prevention during Run.
(0 - Determined by A1-02)
Stall Prevention function during run prevents the motor from stalling by automatically reducing the speed when
an oL1 [Motor Overload] occurs while the motor is running at constant speed.
Note:
• An output frequency less than 6 Hz disables Stall Prevention during Run. The setting values of L3-05 and L3-06 [StallP Level@Run]
do not have an effect.
0 : Disabled
1 : Enabled
■ L3-06: StallP Level@Run
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L3-06
StallP Level@Run
Determined by C6-01 and
L8-38
(0494)
Sets the output current level at which the Stall Prevention function is enabled during run when the
drive rated output current is 100%.
(5 - 150%)
Note:
• This parameter is applicable when L3-05 = 1 [StallP@RUN Enable = Enabled] and L3-51 = 0, 1 [StallP@RUNDecTime = Dec Time 1
(C1-02), Dec Time 2 (C1-04)].
• When L3-23 = 2 [CHP Stall P Selection = Automatic Reduction], the drive will automatically decrease the level in the constant power
range.
Use an Analog Input to Change the Stall Prevent Level during Run
When H3-xx = 14 [MFAI Function Select = StallPLev@Rn], you can use the input gain and bias settings for
terminals AI1 and AI2 to change the stall prevention level during run.
If you set the input level for terminals AI1 and AI2 [H3-xx = 14] and L3-06, the drive will use the smaller value
for Stall Prevent Level during Run.
Figure 12.120 Stall Prevention Level during Run with Analog Input
■ L3-11: Overvolt Supression Select
No.
Default
Name
Description
(Hex.)
(Range)
L3-11
Overvolt Supression Select
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04C7)
Sets the overvoltage suppression function.
(0, 1)
0 : Disabled
The drive does not adjust the regenerative torque limit or the output frequency. If you apply a regenerative load,
the drive can detect an ov [Overvoltage] fault. Use this setting with a dynamic braking option.
1 : Enabled
When a regenerative load increases the DC bus voltage, the drive decreases the regenerative torque limit and
increases the output frequency to prevent ov
12
651
12.8 L: PROTECTION
■ L3-17: DCBus Regul.Level
No.
Default
Name
Description
(Hex.)
(Range)
L3-17
DCBus Regul.Level
V/f
OLV OLV/PM AOLV/PM EZOLV
200 V Class: 375 V, 400 V:
750 V
(0462)
Sets the target value for the DC bus voltage when the overvoltage suppression function and the
Decel Stall Prevention function (Intelligent Stall Prevention) are active.
(200 V Class: 150 to 400 V,
400 V Class: 300 to 800 V)
Note:
This value is initialized when E1-01 [Input AC Supply Voltage] is changed.
Sets this parameter for any of the following circumstances.
• L3-11 = 1 [Overvolt Supression Select = Enabled].
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction].
■ L3-20: DCBus VoltAdj Gain
No.
Default
Name
Description
(Hex.)
(Range)
L3-20
DCBus VoltAdj Gain
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(0465)
Sets the proportional gain used to control the DC bus voltage.
(0.00
- 5.00)
Expert
Set one of these parameters to enable L3-20:
• L2-29 = 2 [KEB Method = Single KEB2 Ride-Thru]
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction]
• L3-11 = 1 [Overvolt Supression Select = Enabled]
• H1-xx = 42 or 43 [MFDI Function Select = KEB Thru2 NC or KEB Thru2 NO]
Note:
• If stall prevention during deceleration function causes ov [Overvoltage] and Uv1 [DC Bus Undervoltage] faults when you start
deceleration and L2-29 = 1, H1-xx = 42 or 43, or L3-04 = 1 and L3-50 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
• If sudden increases in the regenerative load cause ov faults and L3-11 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
■ L3-21: OVSup Acc/Dec Gain
No.
Default
Name
Description
(Hex.)
(Range)
L3-21
OVSup Acc/Dec Gain
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(0466)
Sets the proportional gain to calculate acceleration and deceleration rates.
(0.10
- 10.00)
Expert
Set one of these parameters to enable L3-21:
• L2-29 = 2 [KEB Method = Single KEB2 Ride-Thru]
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction]
• L3-11 = 1 [Overvolt Supression Select = Enabled]
• H1-xx = 42 or 43 [MFDI Function Select = KEB Thru2 NC or KEB Thru2 NO]
Note:
• If stall prevention during deceleration function causes ov [Overvoltage] and Uv1 [DC Bus Undervoltage] faults when you start
deceleration and L2-29 = 1, H1-xx = 42 or 43, or L3-04 = 1 and L3-50 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
• If sudden increases in the regenerative load cause ov faults and L3-11 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
652
12.8 L: PROTECTION
■ L3-22: StallP@Acc Deceleration Time
No.
Default
Name
Description
(Hex.)
(Range)
L3-22
StallP@Acc Deceleration
V/f
OLV OLV/PM AOLV/PM EZOLV
0.0 s
Time
(04F9)
Sets the momentary deceleration time that the drive will use when it tries to accelerate a PM
(0.0 - 6000.0 s)
motor and detected motor stalls. This function is applicable when L3-01 = 2 [StallP Mode@Accel
= General Purpose].
Set this parameter to 0.0 s to disable this function. The drive will decelerates in the deceleration time applicable at
the time when a motor stall occurs.
■ L3-23: CHP Stall P Selection
No.
Default
Name
Description
(Hex.)
(Range)
L3-23
CHP Stall P Selection
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(04FD)
Sets the function to automatically decrease the Stall Prevention Level during Run for constant
(1, 2)
output ranges.
1 : Level@L3-06
The drive uses the level set in L3-06 [StallP Level@Run] through the full speed range.
2 : Automatic Reduction
The drive decreases the Stall Prevention level during run in the constant power range. The lower limit is 40% of
L3-06 value.
■ L3-24: Acc@Rated Torque
No.
Default
Name
Description
(Hex.)
(Range)
L3-24
Acc@Rated Torque
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by o2-04, C6-
01, E2-11, and E5-01
(046E)
Sets the motor acceleration time to reach the maximum frequency at the motor rated torque for
stopped single-drive motors.
(0.001 - 10.000 s)
Expert
Set one of these parameters to enable L3-20:
• L2-29 = 2 [KEB Method = Single KEB2 Ride-Thru]
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction]
• L3-11 = 1 [Overvolt Supression Select = Enabled]
• H1-xx = 42 or 43 [MFDI Function Select = KEB Thru2 NC or KEB Thru2 NO]
Note:
When Auto-Tuning changes the value of E2-11 [Motor Rated Power (kW)], the drive will automatically set this parameter to the value
for a Yaskawa standard motor (4 poles). When you use a PM motor, the drive uses the value in E5-01 [PM Mot Code Selection] to
change L3-24.
■ L3-25: Load Inertia Ratio
No.
Default
Name
Description
(Hex.)
(Range)
L3-25
Load Inertia Ratio
V/f
OLV OLV/PM AOLV/PM EZOLV
1.0
(046F)
Sets the ratio between motor inertia and machine inertia.
(0.1
- 1000.0)
Expert
Set one of these parameters to enable L3-20:
• L2-29 = 2 [KEB Method = Single KEB2 Ride-Thru]
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction]
• L3-11 = 1 [Overvolt Supression Select = Enabled]
• H1-xx = 42 or 43 [MFDI Function Select = KEB Thru2 NC or KEB Thru2 NO]
Note:
• If you set this value incorrectly when L2-29 = 1, H1-xx = 42 or 43, or L3-11 = 1, it can cause large current ripples and ov
[Overvoltage], Uv1 [DC Bus Undervoltage], or oC [Overcurrent] faults.
12
• KEB Tuning will automatically set this value.
653
12.8 L: PROTECTION
■ L3-26: DC Bus Capacitors Extension
No.
Default
Name
Description
(Hex.)
(Range)
L3-26
DC Bus Capacitors
V/f
OLV OLV/PM AOLV/PM EZOLV
0 μF
Extension
(0455)
Sets the capacity for external main circuit capacitors. Usually it is not necessary to change this
(0 to 65000 μF)
setting. Sets this parameter when you use the KEB Ride-Thru function.
Expert
■ L3-27: StallP Detect Time
No.
Default
Name
Description
(Hex.)
(Range)
L3-27
StallP Detect Time
V/f
OLV OLV/PM AOLV/PM EZOLV
60 ms
(0456)
Sets a delay time between reaching the Stall Prevention level and starting the Stall Prevention
(0 - 5000 ms)
function.
■ L3-34: Torque Lim.Delay Time
No.
Default
Name
Description
(Hex.)
(Range)
L3-34
Torque Lim.Delay Time
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(016F)
Sets the filter time constant that returns the torque limit to its initial value when KEB operation
(0.000 - 1.000 s)
operates in Single Drive KEB Ride-Thru mode.
Expert
When vibration occurs during operation of Single Drive KEB Ride-Thru 2, increase this parameter in 0.010-unit
increments.
Note:
The Single Drive KEB Ride-Thru 2 mode operates when L2-29 = 2 [KEB Method = Single KEB2 Ride-Thru] and H1-xx = 42 or 43
[Terminal DIx Function Select = KEB Thru2 NC or KEB Thru2 NO].
■ L3-35: SpAgree Width@StallP
No.
Default
Name
Description
(Hex.)
(Range)
L3-35
SpAgree Width@StallP
V/f
OLV OLV/PM AOLV/PM EZOLV
0.00 Hz
(0747)
Sets the width for speed agreement when L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50
(0.00 - 1.00 Hz)
= 1 [StallP@Decel Mode = Automatic Decel Reduction]. Usually it is not necessary to change
Expert
this setting.
Set this parameter when hunting occurs while you use a frequency reference through an analog input.
■ L3-36: VibSup Gain@Accel
No.
Default
Name
Description
(Hex.)
(Range)
L3-36
VibSup Gain@Accel
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(11D0)
Sets the gain to suppress current and motor speed hunting during operation when L3-01 = 4
(0.0
- 100.0)
[StallP Mode@Accel = ILim Mode]. Usually it is not necessary to change this setting.
If there is vibration in the output current during acceleration, increase the setting value.
Note:
Set L3-01 = 4 [StallP Mode@Accel = ILim Mode] to enable this function.
■ L3-37: CurLim ITime@Accel
No.
Default
Name
Description
(Hex.)
(Range)
L3-37
CurLim ITime@Accel
V/f
OLV OLV/PM AOLV/PM EZOLV
5 ms
(11D1)
Suppresses current hunting during acceleration. Usually it is not necessary to change this setting.
(0 - 100 ms)
Expert
Note:
Set L3-01 = 4 [StallP Mode@Accel = ILim Mode] to enable this function.
654
12.8
L: PROTECTION
■ L3-38: CurLim PGain@Accel
No.
Default
Name
Description
(Hex.)
(Range)
L3-38
CurLim PGain@Accel
V/f
OLV OLV/PM AOLV/PM EZOLV
10.0
(11D2)
Suppresses current hunting and overshooting that occurs when the drive stalls during acceleration.
(0.0
- 100.0)
Usually it is not necessary to change this setting.
Expert
Note:
Set L3-01 = 4 [StallP Mode@Accel = ILim Mode] to enable this function.
■ L3-39: CurLim Filt@Accel
No.
Default
Name
Description
(Hex.)
(Range)
L3-39
CurLim Filt@Accel
V/f
OLV OLV/PM AOLV/PM EZOLV
100.0 ms
(11D3)
Sets the time constant to adjust the acceleration rate when L3-01 = 4 [StallP Mode@Accel = ILim
(1.0 - 1000.0 ms)
Mode]. Usually it is not necessary to change this setting.
Note:
Set L3-01 = 4 [StallP Mode@Accel = ILim Mode] to enable this function.
■ L3-40: CurLim SCurve@Acc/Dec
No.
Default
Name
Description
(Hex.)
(Range)
L3-40
CurLim SCurve@Acc/Dec
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(11D4)
Sets the function to enable and disable the best S-curve characteristic used for current-limited
(0, 1)
acceleration.
Makes the best motor acceleration rate for start up. If you set this parameter to 1, it will make acceleration
smoother, but it can also increase the acceleration time to be longer than the set time. If the drive detects oC
[Overcurrent] faults immediately after acceleration starts, set this parameter.
0 : Disabled
1 : Enabled
Note:
Set L3-01 = 4 [StallP Mode@Accel = ILim Mode] to enable this function.
■ L3-50 StallP@Decel Mode
No.
Default
Name
Description
(Hex.)
(Range)
L3-50
StallP@Decel Mode
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(0458)
Sets the method that the drive will use to prevent overvoltage faults when decelerating.
(Determined by A1-02)
Note:
1. To connect a dynamic braking option (braking resistor or braking resistor unit) to the drive, set this parameter to 0 or 3. Parameter
values 1, 2, 4, and 5 will enable Stall Prevention function during deceleration, and the dynamic braking option will not function.
2. The setting range changes when the A1-02 [Control Method] value changes:
• When A1-02 = 5 [PM OLVector], setting range is 0 to 2
• When A1-02 = 6, or 8 [PM AOLVector, or EZ Vector], setting range is 0, 1.
Stall Prevention during deceleration controls the deceleration as specified by the DC bus voltage and does not let
high inertia or fast deceleration cause ov [Overvoltage] faults.
0 : General Purpose
The drive decelerates as specified by the deceleration time. When the DC bus voltage is more than the Stall
Prevention level, the drive stops deceleration until the DC bus voltage is less than the Stall Prevention Level. The
drive then starts to decelerate at the set deceleration time. Frequent use of Stall Prevention will help prevent ov
faults when the deceleration time is shorter than the drive can usually accept.
Note:
The Decel Stall Prevention function will increase the deceleration time to stop and the deceleration time will be longer than the setting.
This function is not applicable for conveyor applications because the precision of the stop position is very important. As an alternative,
use a dynamic braking option in these applications.
12
The input voltage setting of E1-01 [Input AC Supply Voltage] sets the DC bus voltage level for Stall Prevention.
655
12.8 L: PROTECTION
Table 12.51 Stall Prevention Level during Deceleration
Drive Input Voltage
Stall Prevention Level during Deceleration
400 V class
754 V
Figure 12.121 shows the Stall Prevention during deceleration function.
Figure 12.121 Stall Prevention Operation during Deceleration
1 : Automatic Decel Reduction
The drive adjusts the deceleration rate to keep the DC bus voltage at the L3-17 [DCBus Regul.Level] level. This
makes the shortest possible deceleration time and will not let the motor stall. The drive ignores the selected
deceleration time and the possible deceleration time cannot be less than 1/10 of the set deceleration time.
This function uses these parameters to adjust the deceleration rate:
• L3-20 [DCBus VoltAdj Gain]
• L3-21 [OVSup Acc/Dec Gain]
• L3-24 [Acc@Rated Torque]
• L3-25 [Load Inertia Ratio]
Note:
The deceleration time is not constant. For applications where the precision of the stop position is very important, use a dynamic braking
option and set L3-04 = 0. If an ov occurs, set L3-04 = 3.
2 : Gen Purpose w/ DB Resistor
A braking resistor is necessary for this setting. The braking resistor and the drive work together for the Stall
Prevention during deceleration function.
3 : HiFlux Overexcitation
Enables Overexcitation/High Flux and enables a shorter deceleration time than when L3-04 = 0.
Note:
• If the overexcitation time is long and you decelerate frequently, the drive can detect oL1 [Motor Overload] faults. If the drive detects
oL1, decrease the deceleration time or install a braking resistor to the drive.
• The deceleration time during Overexcitation Deceleration changes when the motor characteristics and machine inertia change. Adjust
the n3-13 [OverExcBr Gain] and n3-23 [OverExcBr Operation] levels. Refer to “n3: HIGHSLIP/OVEREXCITATION BRAKE” for
more information.
4 : HiFlux2 Overexcitation
Enables Overexcitation/High Flux 2. This function decreases the possible deceleration time more than
Overexcitation/High Flux.
The drive decreases motor speed and tries to keep the DC bus voltage at the L3-17 level.
If the drive detects oL1, decrease the values set in n3-13 and n3-21. If the drive detects ov, increase the values set
in C1-02, C1-04, C1-06, and C1-08 [Decel Time 4].
Note:
• During Overexcitation/High Flux 2, the drive disables Hunting Prevention in V/f Control and also disables Speed Control that uses
torque limit in OLV Control.
• Refer to “n3: HIGHSLIP/OVEREXCITATION BRAKE” for more information.
■ L3-51 StallP@RUNDecTime
No.
Default
Name
Description
(Hex.)
(Range)
L3-51
StallP@RUNDecTime
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(0459)
Sets the function to enable and disable Stall Prevention During Run.
(Determined by A1-02)
0 : Dec Time 1 (C1-02)
656
12.8 L: PROTECTION
1 : Dec Time 2 (C1-04)
◆ L4: SPEED DETECTION
L4 parameters set the output of signals to the MFDO terminals, for example frequency agree and speed detection.
■ L4-01: SpAgree Det.Level
No.
Default
Name
Description
(Hex.)
(Range)
L4-01
SpAgree Det.Level
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(0499)
Sets the level to detect speed agree or motor speed.
(Determined by A1-02)
Sets the level to detect speed agree or motor speed when H2-01 to H2-03 = F, 10, 13, 14 [NO,NC,CM
FuncSelection to DO2-O2C Func Selection = SpeedAgree1, USpeedAgree1, FreqDetect 1, FreqDetect 2].
■ L4-02: SpAgree Det.Width
No.
Default
Name
Description
(Hex.)
(Range)
L4-02
SpAgree Det.Width
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(049A)
Sets the width to detect speed agree or motor speed.
(Determined by A1-02)
Sets the width to detect speed agree or motor speed when H2-01 to H2-03 = F, 10, 13, 14 [NO,NC,CM
FuncSelection to DO2-O2C Func Selection = SpeedAgree1, USpeedAgree1, FreqDetect 1, FreqDetect 2].
■ L4-03: SpAgree Det.Level(+/-)
No.
Default
Name
Description
(Hex.)
(Range)
L4-03
SpAgree Det.Level(+/-)
V/f
OLV OLV/PM AOLV/PM EZOLV
Determined by A1-02
(049B)
Sets the level to detect speed agree or motor speed.
(Determined by A1-02)
Sets the level to detect speed agree or motor speed when H2-01 to H2-03 = 11, 12, 15, 16 [NO,NC,CM
FuncSelection to DO2-O2C Func Selection = SpeedAgree2, USpeedAgree2, FreqDetect 3, FreqDetect 4].
■ L4-04: SpAgree Det.Width(+/-)
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L4-04
SpAgree Det.Width(+/-)
Determined by A1-02
(049C)
Sets the width to detect speed agree or motor speed.
(Determined by A1-02)
Sets the width to detect speed agree or motor speed when H2-01 to H2-03 = 11, 12, 15, 16 [NO,NC,CM
FuncSelection to DO2-O2C Func Selection = SpeedAgree2, USpeedAgree2, FreqDetect 3, FreqDetect 4].
■ L4-05: FrefLoss Det.Selection
No.
Default
Name
Description
(Hex.)
(Range)
L4-05
FrefLoss Det.Selection
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(049D)
Sets the operation when the drive detects a loss of frequency reference.
(1, 2)
Enables the detection of a loss of an analog frequency reference when MFAI terminals (AI1 and AI2) input the
frequency reference. Set H2-01 to H2-03 = 4B [MFDO Function Select = FreqRef Loss] to enable this function.
If the frequency reference is less than 10% in 400 ms, the drive detects frequency reference loss.
12
Figure 12.122 Detection of Frequency Reference Loss
1 : Stop
657
12.8 L: PROTECTION
The drive follows the frequency reference and stops the motor.
2 : Run@L4-06PrevRef
The drive continues to operate at the frequency reference value set in L4-06 [Freq.Ref@RefLoss]. When you
return the external frequency reference value, the drive continues to operate with the frequency reference.
■ L4-06: Freq.Ref@RefLoss
No.
Default
Name
Description
(Hex.)
(Range)
L4-06
Freq.Ref@RefLoss
V/f
OLV OLV/PM AOLV/PM EZOLV
80.0%
(04C2)
Sets the frequency reference as a percentage to continue drive operation after it detects a
(0.0
- 100.0%)
frequency reference loss. The value is a percentage of the frequency reference before the drive
detected the loss.
Set L4-05 = 2 [FrefLoss Det.Selection = Run@L4-06PrevRef] to enable this parameter.
■ L4-07: SpAgree Det.Selection
No.
Default
Name
Description
(Hex.)
(Range)
L4-07
SpAgree Det.Selection
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(0470)
Sets the condition that activates speed detection.
(1, 2)
1 : No Detect@BB
Detects the frequency while the drive is operating. When the drive turns off its output, it will not detect frequency.
2 : Always Detect
■ L4-08: Sp Agree Source Selection
No.
Default
Name
Description
(Hex.)
(Range)
L4-08
Sp Agree Source Selection
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(047F)
Sets the drive to use the soft starter output frequency or the motor speed (estimation value) for
(0, 1)
speed detection.
0 : SFS O/P (Reference)
1 : MotSpd (ActSpeed)
The setting for L4-08 has an effect:
• When you set detection conditions for oL3 [Overtorque 1], oL3 [Overtorque Detection 1], oL4 [Overtorque
2],
and oL4 [Overtorque Detection 2]:
- L6-01 = 1 [Trq Det1 Select = Enabled] and L6-50 = 1 [Trq Det1 Type = At Underload]
- L6-04 = 1 [Trq Det2 Select = Enabled] and L6-53 = 1 [Trq Det2 Type = At Underload]
• When you use speed agreement with Q2dev.
• When the MFDI terminals set for H1-xx = 65, 66 [Up2 Command, Dw2 Command] activate.
• When you set H2-xx [MFDO Function Select] to these functions:
Setting Value
Function
Setting Value
Function
F
SpeedAgree1
13
FreqDetect 1
10
USpeedAgree1
14
FreqDetect 2
11
SpeedAgree2
15
FreqDetect 3
12
USpeedAgree2
16
FreqDetect 4
• When you use these functions for Modbus monitor data:
658
12.8 L: PROTECTION
Register No.
Description
Drive Status 2
Speed agreement
bit2
1: During agreement
User-defined speed agreement
bit3
002CH
1: During agreement
Frequency Detection 1
bit4
1: Output frequency ≤ L4-01
Frequency Detection 2
bit5
1: Output frequency ≥ L4-01
U1-12 [Drive Status]
004BH
bit4
1: During speed agreement
• When you use these functions for monitor parameters:
No.
Name
Description
(Hex.)
U1-12
Drive Status
bit 4: During speed agreement
(004B)
◆ L5: FAULT RESTART
The Auto Restart function tries to keep machines operating when the drive detects a transient fault.
The drive can do a self-diagnostic check and continue the operation after a fault. If the cause of the fault goes
away, the drive does speed search and restarts. It will not stop and the drive will not record a fault history. Use L5-
02 [Fault@Reset Select] to select the operation of fault relay signals during Auto Restart operation.
Sets if the drive will do Auto Restart and the number of times the drive will try to do Auto Restart in a set time. If
the number of Auto Restart tries is more than the set value during the set time, drive output shuts off and operation
stops. If this happens, remove the cause of the fault and manually restart the drive.
WARNING! Sudden Movement Hazard. Do not use the fault restart function in hoist or lifting applications. Failure to obey can
cause death or serious injury.
The drive can do Auto Restart when these faults occur:
Note:
You can disable Auto Restart for faults if you must not restart the machine after the fault.
Table 12.52 List of Faults during which Auto Restart is Available
Parameters to Disable
Parameters to Disable
Fault
Name
Fault
Name
Auto Restart
Auto Restart
GF
Ground Fault
L5-08
ov
Overvoltage
L5-08
LF
Output Phase Loss
-
PF
Input Phase Loss
-
oC
Overcurrent
-
rH
Braking Resistor Overheat
-
oH1
Heatsink Overheat
L5-08
rr
Dynamic Braking
-
Transistor Fault
oL1
Motor Overload
L5-07
STPo
Motor Step-Out Detected
-
oL2
Drive Overload
L5-07
Uv1
DC Bus Undervoltage *1
L5-08
oL3
Overtorque Detection 1
L5-07
oL4
Overtorque Detection 2
L5-07
*1
Uv1 is the target for the auto restart process when L2-01 = 1 [RideThru@PwrLoss = Enabled], and L2-50 = 0, 1, 2, 3
[RidThruMode@PwrLoss = Timer Controlled, While CPU Active, KEB Mode, KEB Stop Mode].
■ L5-01: Auto-Reset Attempts
No.
Default
Name
Description
(Hex.)
(Range)
L5-01
Auto-Reset Attempts
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(049E)
Sets the number of times that the drive will try to restart.
(0 - 10 times)
The drive resets the number of Auto Restart attempts to 0 in these conditions:
12
• The drive operates correctly for 10 minutes after a fault restart.
659
12.8 L: PROTECTION
• When you manually clear a fault after the drive triggers protective functions.
• When you re-energize the drive.
■ L5-02: Fault@Reset Select
No.
Default
Name
Description
(Hex.)
(Range)
L5-02
Fault@Reset Select
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(049F)
Sets the function that sends signals to the MFDO terminal set for Fault [H2-xx = 3] while the
(1, 2)
drive is automatically restarting.
1 : Disable Fault Output
2 : Enable Fault Output
■ L5-04: Interval Reset Time
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L5-04
Interval Reset Time
10.0 s
(046C)
Sets the time interval between each Auto Restart attempt. This function is enabled when L5-05 =
(0.5 - 600.0 s)
2 [Reset Method = Use L5-04 Time].
■ L5-05: Reset Method
No.
Default
Name
Description
(Hex.)
(Range)
L5-05
Reset Method
V/f
OLV OLV/PM AOLV/PM EZOLV
1
(0467)
Sets the count method for the Auto Restart operation.
(1, 2)
1 : Continuous
Counts the number of successful fault resets through Auto Restart.
When this value > L5-01, the drive will send a fault signal and fault code to the keypad and the motor will coast to
stop.
2 : Use L5-04 Time
Counts the number of all fault resets (successful and unsuccessful) through Auto Restart. The drive repeats the
Auto Restart process in the intervals set in L5-04 [Interval Reset Time].
When this value > L5-01, the drive will send a fault signal and fault code to the keypad and the motor will coast to
stop.
■ L5-07: OL1-4 Auto-Reset Select
No.
Default
Name
Description
(Hex.)
(Range)
L5-07
OL1-4 Auto-Reset Select
V/f
OLV OLV/PM AOLV/PM EZOLV
1111
(0B2A)
Use these 4 digits to set the Auto Restart function for oL1 to oL4. From left to right, the digits set
(0000 - 1111)
oL1, oL2, oL3, and oL4, in order.
0000 : Disabled
0001 : Enabled (—/—/—/oL4)
0010 : Enabled (—/—/oL3/—)
0011 : Enabled (—/—/oL3/oL4)
0100 : Enabled (—/oL2/—/—)
0101 : Enabled (—/oL2/—/oL4)
0110 : Enabled (—/oL2/oL3/—)
0111 : Enabled (—/oL2/oL3/oL4)
1000 : Enabled (oL1/—/—/—)
1001 : Enabled (oL1/—/—/oL4)
1010 : Enabled (oL1/—/oL3/—)
1011 : Enabled (oL1/—/oL3/oL4)
1100 : Enabled (oL1/oL2/—/—)
1101 : Enabled (oL1/oL2/—/oL4)
660
12.8 L: PROTECTION
1110 : Enabled (oL1/oL2/oL3/—)
1111 : Enabled (oL1/oL2/oL3/oL4)
Figure 12.123 Setting Digits and Fault Code
■ L5-08: U/OV,OH,GF A-Reset Select
No.
Default
Name
Description
(Hex.)
(Range)
L5-08
U/OV,OH,GF A-Reset
V/f
OLV OLV/PM AOLV/PM EZOLV
1111
Select
(0B2B)
Use these 4 digits to set the Auto Restart function for Uv1, ov, oH1, and GF. From left to right,
(0000 - 1111)
the digits set Uv1, ov, oH1, and GF, in order.
0000 : Disabled
0001 : Enabled (—/-/—/GF)
0010 : Enabled (—/-/oH1/-)
0011 : Enabled (—/-/oH1/GF)
0100 : Enabled (—/ov/—/-)
0101 : Enabled (—/ov/—/GF)
0110 : Enabled (—/ov/oH1/-)
0111 : Enabled (—/ov/oH1/GF)
1000 : Enabled (Uv1/-/—/-)
1001 : Enabled (Uv1/-/—/GF)
1010 : Enabled (Uv1/-/oH1/-)
1011 : Enabled (Uv1/-/oH1/GF)
1100 : Enabled (Uv1/ov/—/-)
1101 : Enabled (Uv1/ov/—/GF)
1110 : Enabled (Uv1/ov/oH1/-)
1111 : Enabled (Uv1/ov/oH1/GF)
Figure 12.124 Setting Digits and Fault Code
◆ L6: TORQUE DETECTION
The overtorque/undertorque detection function prevents damage to machinery and loads.
Overtorque is the when there is too much load on the machine. If the motor current or output torque is at the
overtorque detection level for the overtorque detection time, the drive will output an alarm and turn off the output.
Undertorque is the when a load suddenly decreases. When the motor current or output torque is at the undertorque
detection level for the undertorque detection time, the drive will outupt an alarm and turn off the output.
You can use the undertorque detection function to detect these conditions, for example:
• Machine belt cuts
• Unusual operation of the electromagnetic contactor on the drive output side
• Clogged output side air filters in fans and blowers
• Damage to blade tips and broken string
Note:
If there is oC [Overcurrent] or oL1 [Motor Overload], the drive can stop during overtorque conditions. Use torque detection to identify
overload conditions before the drive detects oC or oL1 and stops. Use this function to detect issues that occur in the application.
■ Parameter Settings
12
You can individually set the two overtorque/undertorque detection functions with the drive. Use the information in
Table 12.53 to set the parameters.
661
12.8 L: PROTECTION
Table 12.53 Overtorque/Undertorque Detection Parameters
Configuration Parameter
Overtorque/Undertorque Detection 1
Overtorque/Undertorque Detection 2
MFDO Function Select
H2-01, H2-02, and H2-03 = 32
H2-01, H2-02, and H2-03 = 37
• Terminal NO-CM
N.O.: Activated when detected
N.O.: Activated when detected
• Terminal DO1-O1C
H2-01, H2-02, and H2-03 = 33
H2-01, H2-02, and H2-03 = 38
• Terminal DO2-O2C
N.C.: Disactivated when detected
N.C.: Disactivated when detected
Detection conditions and selection of operation after
L6-01
L6-04
detection
Detection Level
L6-02
L6-05
Analog Input Terminal *1
-
H3-xx = E
Detection Time
L6-03
L6-06
*1
You can also use an analog input terminal to supply the torque detection level. To enable this function, set H3-xx = E [MFAI
Function Select = OvUntrq Level]. If both L6-02 and H3-xx = E are set, the analog input has priority and the setting of L6-02 is
disabled.
You cannot use Overtorque/Undertorque Detection 2 to set the detection level for the analog input terminals.
Note:
In V/f Control, the drive uses the current level (100% of the drive rated output current) to detect overtorque/undertorque. In vector
control, the drive uses the motor torque (100% of the motor rated torque)to detect overtorque/undertorque. When you enable the
mechanical weakening detection function, the overtorque/undertorque detection level for all control modes is the current level (100% of
the drive rated output current).
■ Time Chart for Detection of Overtorque/Undertorque
Overtorque Detection Time Chart
When you use Overtorque/Undertorque Detection 1, the drive detects overtorque if the motor current or motor
torque is at the detection level set in L6-02 [Trq Det1 Level] for the time set in L6-03 [Trq Det1 Time]. Parameter
L6-01 [Trq Det1 Select] sets the operation after detection.
When you use Overtorque/Undertorque Detection 2, set L6-04 [Trq Det2 Select], L6-05 [Trq Det2 Level], and L6-
06 [Trq Det2 Time].
Set the terminal that outputs the alarm in H2-01 to H2-03 [MFDO Function Select].
Figure 12.125 Overtorque Detection Time Chart
Note:
The drive applies a hysteresis of approximately 10% of the drive rated output current or the motor rated torque to the overtorque/
undertorque detection function.
Undertorque Detection Time Chart
When you use Overtorque/Undertorque Detection 1, the drive detects undertorque if the motor current or motor
torque is less than or equal to the detection level set in L6-02 for the time set in L6-03. Parameter L6-01 sets the
operation after detection.
When you use Overtorque/Undertorque Detection 2, set the operation in L6-04, L6-05, and L6-06.
Set the terminal that outputs an alarm in H2-01 to H2-03.
662
12.8 L: PROTECTION
Figure 12.126 Undertorque Detection Time Chart
Note:
The drive applies a hysteresis of approximately 10% of the drive rated output current or the motor rated torque to the overtorque/
undertorque detection function.
■ Mechanical Weakening Detection
The Mechanical Weakening Detection function detects the mechanical weakening of a machine that can cause
overtorque or undertorque because of motor speed and total drive operation time.
The drive activates the function if the drive total operation time is longer than the time set in L6-11 [MechFatigue
Hold Off Time]. You can use U4-01 [Cumulative OpeTime] to monitor the total operation time.
Parameter Settings
If overtorque or undertorque occur during the speed range set in L6-08 [MechF Enable] and L6-09 [MechFatigue
Speed Detect Level] for the length of time set in L6-10 [MechFatigue Delay Time], the drive will detect
Mechanical Weakening. The drive uses L6-01 to L6-03 to detect oL5 [Mechanical Weakening Detection 1] or UL5
[Mechanical Weakening Detection 2]. Parameter L6-08 sets the operation after detection.
Set the terminal that outputs the fault in H2-01 to H2-03 [MFDO Function Select].
Table 12.54 Mechanical Weakening Detection Settings Parameters
Configuration Parameter
Mechanical Deterioration Detection
MFDO Function Select
• Terminal NO-CM
H2-01, H2-02, and H2-03 = 66
• Terminal DO1-O1C
• Terminal DO2-O2C
Operation Selection after Detection
L6-08
Detection Start Time
L6-11
Detection Criteria
L6-08
Speed Range
Detection Level
L6-09
Detection Time
L6-10
Detection Criteria
L6-01
Overtorque
Detection Level
L6-02
Detection Time
L6-03
■ L6-01: Trq Det1 Select
No.
Default
Name
Description
(Hex.)
(Range)
L6-01
Trq Det1 Select
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04A1)
Enables overtorque and undertorque detection and the operation of drives (operation status) after
(0, 1)
detection.
The drive detects overtorque if the motor current or output torque is more than the level set in L6-02 [Trq Det1
Level] for the length of time set in L6-03 [Trq Det1 Time]. The drive detects undertorque if the motor current or
output torque is less than the level set in L6-02 for the length the time set in L6-03.
0 : Disabled
The drive will not detect overtorque or undertorque.
1 : Enabled
The behavior is adjusted using parameters L6-50 [Trq Det1 Type], L6-51 [Trq Det1 Action], and L6-52 [Trq Det1
12
Condition].
663
12.8 L: PROTECTION
■ L6-02: Trq Det1 Level
No.
Default
Name
Description
(Hex.)
(Range)
L6-02
Trq Det1 Level
V/f
OLV OLV/PM AOLV/PM EZOLV
150%
(04A2)
Sets the detection level for Overtorque/Undertorque Detection 1. In V/f control, drive rated output
(0 - 300%)
current = 100% value. In vector control, motor rated torque = 100% value.
Note:
• Set the torque detection level as a percentage of the drive rated output current in all control methods to set the mechanical weakening
detection level.
• You can also use an analog input terminal to supply the torque detection level. To enable this function, set H3-xx = E [MFAI Function
Select = OvUntrq Level]. If you set L6-02 and H3-xx = E, the analog input is most important and the drive disables L6-02.
■ L6-03: Trq Det1 Time
No.
Default
Name
Description
(Hex.)
(Range)
L6-03
Trq Det1 Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.1 s
(04A3)
Sets the detection time for Overtorque/Undertorque Detection 1.
(0.0 - 10.0 s)
■ L6-04: Trq Det2 Select
No.
Default
Name
Description
(Hex.)
(Range)
L6-04
Trq Det2 Select
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04A4)
Enables overtorque and undertorque detection and the operation of drives (operation status) after
(0, 1)
detection.
The drive detects overtorque if the motor current or output torque is more than the level set in L6-05 [Trq Det2
Level] for the length of time set in L6-06 [Trq Det2 Time]. The drive detects undertorque if the motor current or
output torque is less than the level set in L6-05 for the length the time set in L6-06. Adjust the conditions using
parameters L6-53, L6-54, and L6-55 [Trq Det2 Type, Trq Det2 Action, and Trq Det2 Condition].
0 : Disabled
1 : Enabled
■ L6-05: Trq Det2 Level
No.
Default
Name
Description
(Hex.)
(Range)
L6-05
Trq Det2 Level
V/f
OLV OLV/PM AOLV/PM EZOLV
150%
(04A5)
Sets the detection level for Overtorque/Undertorque Detection 2. In V/f control, drive rated output
(0 - 300%)
current = 100% value. In vector control, motor rated torque = 100% value.
Note:
Overtorque/Undertorque Detection 2 cannot set the detection level for the analog input terminal.
■ L6-06: Trq Det2 Time
No.
Default
Name
Description
(Hex.)
(Range)
L6-06
Trq Det2 Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0.1 s
(04A6)
Sets the detection time for Overtorque/Undertorque Detection 2.
(0.0 - 10.0 s)
■ L6-07: Trq Detect Filter Time
No.
Default
Name
Description
(Hex.)
(Range)
L6-07
Trq Detect Filter Time
V/f
OLV OLV/PM AOLV/PM EZOLV
0 ms
(04E5)
Sets the time constant for a primary filter to the torque reference or to the output current used to
(0 - 1000 ms)
detect overtorque/undertorque.
■ L6-08: MechF Enable
No.
Default
Name
Description
(Hex.)
(Range)
L6-08
MechF Enable
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(0468)
Enables mechanical deterioration detection and how the drive operates (operation status) after
(0, 1)
detection.
664
12.8 L: PROTECTION
The drive detects mechanical weakening through overtorque or undertorque as specified by the conditions set in
L6-08 to L6-11 [MechFatigue Hold Off Time], and L6-56 to L6-58 [MechF Action to MechF Method]. Set
overtorque/undertorque detection conditions in L6-01 to L6-03 [Trq Det1 Select to Trq Det1 Time]. The drive
disables the operation selection set in L6-01 [Trq Det1 Select].
0 : Disabled
The drive does not detect mechanical weakening.
1 : Enabled
The drive detects mechanical weakening. Use parameters L6-56 [MechF Action], L6-57 [MechF AbsSpeed], and
L6-58 [MechF Method] to adjust the conditions.
■ L6-09: MechFatigue Speed Detect Level
No.
Default
Name
Description
(Hex.)
(Range)
L6-09
MechFatigue Speed Detect
V/f
OLV OLV/PM AOLV/PM EZOLV
110.0%
Level
(0469)
Sets the speed level where the drive will operate the mechanical deterioration detection function,
(-110.0 - 110.0%)
as a percentage of the Maximum Output Frequency.
Parameters L6-01 to L6-03 [Trq Det1 Select to Trq Det1 Time] set the overtorque/undertorque detection
conditions.
When L6-08 = 2, 4, 6, 8 [MechF Enable = Speed : unsigned], the setting value of L6-09 is the absolute value.
When L6-09 is set to a negative number, the drive processes this value as a positive number.
■ L6-10: MechFatigue Delay Time
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L6-10
MechFatigue Delay Time
0.1 s
(046A)
Sets the time for mechanical deterioration detection.
(0.0 - 10.0 s)
When the detection conditions set in L6-08 [MechF Enable] continue for the time set in L6-10, the drive will
detect mechanical weakening.
■ L6-11: MechFatigue Hold Off Time
No.
Default
Name
Description
(Hex.)
(Range)
L6-11
MechFatigue Hold Off
V/f
OLV OLV/PM AOLV/PM EZOLV
0h
Time
(046B)
Sets the time that the drive will start mechanical deterioration detection triggered by the
(0 - 65535 h)
cumulative operation time of the drive.
When the total operation time of the drive is more than the value set in L6-11, the drive will detect mechanical
weakening. Use U4-01 [Cumulative OpeTime] to monitor the drive total operation time.
■ L6-50: Trq Det1 Type
No.
Default
Name
Description
(Hex.)
(Range)
L6-50
Trq Det1 Type
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04CC)
Sets the speed range that detects overtorque and undertorque.
(0, 1)
■ L6-51: Trq Det1 Action
No.
Default
Name
Description
(Hex.)
(Range)
L6-51
Trq Det1 Action
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04CD)
Sets operation of drives (operation status) after detection.
(0, 1)
■ L6-52: Trq Det1 Condition
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L6-52
Trq Det1 Condition
0
12
(04CE)
Sets operation of drives (operation status) after detection.
(0, 1)
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12.8 L: PROTECTION
■ L6-53: Trq Det2 Type
No.
Default
Name
Description
(Hex.)
(Range)
L6-53
Trq Det2 Type
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04CF)
Sets the speed range that detects overtorque and undertorque.
(0, 1)
■ L6-54: Trq Det2 Action
No.
Default
Name
Description
(Hex.)
(Range)
L6-54
Trq Det2 Action
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04D0)
Sets operation of drives (operation status) after detection.
(0, 1)
■ L6-55: Trq Det2 Condition
No.
Default
Name
Description
(Hex.)
(Range)
L6-55
Trq Det2 Condition
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04D1)
Sets operation of drives (operation status) after detection.
(0, 1)
■ L6-56: MechF Action
No.
Default
Name
Description
(Hex.)
(Range)
L6-56
MechF Action
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04D2)
Sets the speed where the drive detects mechanical deterioration and how the drive operates
(0, 1)
(operation status) after detection. Only available when L6-08 = 1 [MechF Enable = Enabled].
■ L6-57: MechF AbsSpeed
No.
Default
Name
Description
(Hex.)
(Range)
V/f
OLV OLV/PM AOLV/PM EZOLV
L6-57
MechF AbsSpeed
0
(04D3)
Sets the speed where the drive detects mechanical deterioration and how the drive operates
(0, 1)
(operation status) after detection. Only available when L6-08 = 1 [MechF Enable = Enabled].
■ L6-58: MechF Method
No.
Default
Name
Description
(Hex.)
(Range)
L6-58
MechF Method
V/f
OLV OLV/PM AOLV/PM EZOLV
0
(04D4)
Sets the speed where the drive detects mechanical deterioration and how the drive operates
(0, 1)
(operation status) after detection. Only available when L6-08 = 1 [MechF Enable = Enabled].
Use parameter L6-57 [MechF AbsSpeed] to either use absolute speed or signed speed value.
◆ L7: TORQUE LIMIT
The torque limit function limits the internal torque reference for the drive to and keeps the torque from the motor
constant.
This function limits the torque applied to loads and regenerative torque to a value less than a set quantity. This
function also prevents damage to machinery and increases the reliability of continuous operation. You can set
torque limits individually for the four quadrants, which include torque direction (motoring/regeneration) and
direction of motor rotation (forward/reverse). When the torque reference value is at the set torque limit, the
MFDO terminal set for During Torque Limit [H2-xx = 30] activates.
Note:
• The drive output current limits maximum output torque. The drive limits torque to 150% of the rated output current for Heavy Duty
Rating (HD) and to 110% of the rated output current for Normal Duty Rating (ND). The actual output torque is not more than the limits
of the drive rated output current when you set the torque limit to a high value.
• When you use torque limits for lifting applications, do not lower the torque limit value too much. When the torque limit function is
triggered, falls and rollbacks can occur because of sudden acceleration stops and stalls of the motor.
■ Configuring Settings
Use one of these methods to set torque limits:
• Individually set the four torque limit quadrants using L7-01 to L7-04 [FW Torque Limit to RV Reg. TrqLimit].
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