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15.14.9

RS-232 to RS-485 Adapter

Figure 173

The RS-232 to RS-485 Adapter (IC200ACC415) connects a VersaMax Nano PLC or VersaMax
Micro PLC to an RS-485 communications bus. It supports RS-485 multi-drop connections.

In conjunction with an RJ45 to DB9 Female cable (IC200CBL500), the adapter converts from
the RS-232 (9-pin D-sub male) connector on the Nano/Micro PLC to an RS-485 (15-pin D-
sub female) connector.

Two LEDs on the adapter indicate activity on the transmit and receive lines.

Power for this adapter is provided by the Micro/Nano PLC.

Dimensions of the Adapter are shown below.

Figure 174

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Specifications

Temperature Rating

0ºC to 55ºC

Storage Temp. Rating

-10ºC to 75ºC

Humidity

5 to 95%

Shock

MIL-STD 810C, 15G

Noise Immunity

ANSI/EE C37.90A, 801.2 ESD L3, 801.3 L3, 801.6 RF, 801.4 Fast
Transient L3, 801.5 Surge, EN55011 Emissions

Agency Approvals

UL (Class 1, Div 2) for Nano/Micro PLC version B and higher , CUL and CE

Adapter 15-pin RS-485 Port Connector

The adapter’s RS

-485 port is a standard SNP Port (15-pin D-sub female) connector. It

supports EIA/TIA-485 (RS-485) compatible signal levels. The pin assignments of the RS-485
connector are shown below.

Figure 175

Adapter RS-485 Port Pin Assignments

Pin

Function

Dir.

Pin

Function

Dir.

Shield / Frame GND

RT (RD Term)

N/C

RD(A’)

N/C

RD(B’)

N/C

SD(A)

Out

+5Vdc

Out

SD(B)

Out

RTS(A)

Out

RTS(B)

Out

GND

CTS(A’)

CTS(B’)

[Shell]

Frame GND

RT pin is connected with a 120



resistor to pin 11: RD(B') to provide a simple end-of-line termination through a jumper in the back

shell between pin 10 and pin 9.

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Adapter 9-pin RS-232 (D-sub Male) Port Connector

The Adapter’s RS

-232 port matches the industry standard PC 9-pin male serial port. This

port accepts the same cable (IC200CBL500) used to communicate directly from the

Micro/Nano’s RJ

-45 jack to a PC. This port supports EIA/TIA-232 (RS-232) compatible signal

levels. The +5Vdc output from the Nano/Micro PLC is routed to pin 9 on this cable and is
used to power the converter.

Figure 176

Adapter RS-232 Port Pin Assignments

Pin

Signal

Dir.

Function

DCD

Input

(No Connect)

RXD

Input

Receive Data

TXD

Output

Transmit Data

DTR

Output

(No Connect)

GND

0V/Gnd signal

DSR

Input

(No Connect)

RTS

Output

Request to Send

CTS

Input

Clear to Send

+5V

Input

+5Vdc power in

SHELL

SHLD

Cable Shield wire connection

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15.15

Replacing AC Output Module Fuses

CAUTION

There are no user-replaceable parts in the DC In/Relay Out or DC In/DC Out Micro PLCs.

The AC In/AC Out model Micro PLCs (IC200UAA003/IC200UAA007) provide user-
replaceable fuses for their AC output points. Because each output fuse is on the common of
several circuits, a blown fuse will prevent the entire group associated with it from working.

WARNING

Remove power from the unit before removing field wiring or removing the front cover.
Failure to remove power from the unit before disassembling it could cause severe or fatal
injury to personnel.

CAUTION

Do not attempt to remove the circuit boards from the Micro PLC assembly, or to replace
fuses on the power supply board. Any disassembly beyond removing the front cover and
replacing AC output fuses could damage the unit and will invalidate the warranty.

Fuse replacement should only be performed by qualified service personnel.

The plug-in fuses are located on the I/O circuit board, which is accessible after removing the
Micro PLC front cover. To replace these fuses:

Remove power from the unit and I/O devices.

Remove terminal blocks with attached field wiring from the module

Remove front cover from the unit. (Gently press inward on both tabs on the sides of
the unit and pull the cover straight off.

Note:

The CPU board assembly should remain captive inside the front cover as you remove it.)

Figure 177

Replace each blown fuse with the appropriate fuse type.

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Figure 178: 14-Point Micro PLC (IC200UAA003)

Figure 179: 28-Point Micro PLC (IC200UAA007)

15.15.1

AC Output Fuse Specifications

IC200UAA003/007

F1
F2

Q1-Q2
Q3-Q6

IC200UAA007

F3
F4

Q7-Q8
Q9-Q12

Rated Load Voltage

250 V

Current Rating

3.15 A

Manufacturer

WICKMANN USA, Inc.

http://www.wickmannusa.com/

Manufacturer Part Number

TR5-F-373 series, 3.15A / 250V, Short Leads

Note:

The fuses listed above are only for the output points on the AC In/AC Out Micro PLCs
(IC200UAA003/IC200UAA007). Do not attempt to replace any other parts in any other Micro PLC
unit.

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Chapter 16:

Configuration

This chapter explains how a VersaMax Nano PLC or Micro PLC is configured.

•

Configuration Overview

•

CPU Configuration

•

Port 1 Configuration

•

Port 2 Configuration

•

Configuring Analog I/O Parameters

•

Configuring High-Speed Counter, PWM or Pulse Output Operation

Configuration selects the characteristics of module operation. It also establishes program
references that will be used for each I/O point.

The PLC supports either auto-configuration or storing a configuration from a programmer.

16.1

Configuration Overview

16.1.1

Autoconfiguration

A VersaMax Nano or Micro PLC automatically configures its default parameters every time
it is powered on if no expansion modules are connected. If expansion modules are
connected, auto configuration occurs the first time it is powered on and is then disabled
after the initial auto configuration completes. Auto configuration may be re-enabled in a
system that was previously auto configured with expansion modules by turning the Micro
PLC and expansion modules off, disconnecting all expansion modules, and turning the Micro
PLC on.

Auto  configuration  is  also  disabled  when  the  Nano  or  Micro  PLC  receives  a  valid
configuration  from  Logic  Developer.  Once  auto  configuration  is  disabled,  it  remains
disabled and configuration is retained at power on until configuration is cleared with Logic
Developer  or  the  PLC  is  powered  on  with  the  battery  removed  and  the  memory  backup
capacitor discharged.

16.1.2

Software Configuration

Most PLC systems use a customized configuration that is created using configuration
software and stored to the CPU from a programmer.

The CPU retains a software configuration across power cycles. After a software
configuration is stored to the CPU, the CPU will not auto-configure when power-cycled.

The configuration software can be used to:

•

Create a new configuration

•

Store (write) a configuration to the CPU

•

Load (read) an existing configuration from a CPU

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•

Compare the configuration in a CPU with a configuration file stored in the
programmer

•

Clear a configuration that was previously stored to the CPU

The CPU stores a software configuration in its non-volatile RAM. Storing a configuration
disables auto-configuration, so the PLC will not overwrite the configuration during
subsequent startups.

However, actually clearing a configuration from the programmer does cause a new auto-
configuration to be generated. In that case, auto-configuration is enabled until a
configuration is stored from the programmer again.

For a Nano or Micro PLC, one of the parameters that can be controlled by the software
configuration is whether the CPU reads the configuration and program from Flash at power-
up, or from RAM. If Flash is the configured choice, the CPU will read a previously-stored
configuration from its Flash memory at power-up. If RAM is the choice, the CPU will read a
configuration and application program from its RAM memory at power-up.

16.2

Storing a Configuration from a Programmer

A configuration can be stored from a programmer via the CPU port. The configuration takes
place whether I/O scanning is enabled or not.

Storing a configuration disables auto-configuration.

Note:

If a hardware configuration is stored to the CPU, the configuration for the serial port to which the
programmer is connected is not actually installed until the programmer is removed. After removal
of the programmer, there is a delay before the new protocol begins operating. This delay is equal

to the configured T3’ time.

Clearing a configuration from the programmer causes a new auto-configuration to be
generated. Auto-configuration will be enabled until the configuration is stored from the
programmer again.

When a programmer is first connected to a Nano or Micro PLC, the PLC communicates using
the default communications parameters: 19,200 baud, odd parity, one start bit, one stop
bit, and eight data bits. If these parameters are re-configured, the new settings will be used
at power-up instead.

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16.3

CPU Configuration

CPU configuration establishes the basic operating characteristics of the PLC, such as
whether it scans I/O while in Stop mode and how it behaves at power-up.

Feature

Description

Default

Choices

I/O Scan-Stop

Determines whether I/O is to be scanned while the
PLC is in STOP mode.

Yes, No

Power-up
Mode

Power-up mode for Nano PLC Power-up mode for
Micro PLC

Stop Last

Stop, Run
Last, Stop,
Run

Logic/
Configuration
from

Source of program and configuration when the
Micro PLC is powered up.

Flash for
Nano, RAM
for others

RAM, Flash

Registers

Selects source of register data when PLC is
powered up.

Flash for
Nano, RAM
for others

RAM, Flash

Passwords

Determines whether passwords are enabled or
disabled. (If passwords are disabled, the only way
to enable them is to clear the Micro PLC memory.)

Enabled

Enabled,
Disabled

Checksum
Words

The number of words in the program to be
checksummed each sweep. Entering 0 disables the
checksum function.

8 to 32

Default Modem
Turnaround
Time

Modem turnaround time (10ms/unit) This is the
time required for the modem to start data
transmission after receiving the transmit request.

0mS

–

255mS

Default Idle
Time

Time (in seconds) the CPU waits to receive the next
message from the programming device before it
assumes that the programming device has failed
and proceeds to its base state. Communication
with the programmer is terminated and will have
to be reestablished.

–

SNP ID

The ID used for SNP communications if a serial port
is configured for RTU Slave or Serial I/O. SNP
communications will occur between the
programmer and the CPU when the CPU is in Stop
mode.

Editable
value

Switch
Run/Stop

Determines whether the switch will control
Run/Stop mode operation.

Enabled

Enabled,
Disabled

Switch Memory
Protect

Determines whether the switch will control RAM
memory protection.

Disabled

Enabled,
Disabled

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Feature

Description

Default

Choices

Diagnostics

Micro PLCs can be configured to power up more
quickly by turning off the normal power-up
diagnostics. However, unless your application
requires unusually fast power up, leave this setting
ENABLED. The DISABLED setting causes the Micro
PLC to power up without running diagnostics.
If power-up diagnostics are disabled, no expansion
units can be used. (If expansion units are
connected while power-up diagnostics are
disabled, faults are logged in the I/O tables.)
Micro PLC IC200UDR010 is guaranteed to power
up within 100mS when power-up diagnostics is
disabled.

Enabled

Enabled,
Disabled

Fatal Fault
Override

If the PLC powers up with fatal faults, it
automatically sets fault references. If this
parameter is set to Disabled, the CPU will then go
to Stop mode. If this parameter is set to Enabled,
the CPU can then be power cycled from Stop/Fault
mode and it will go to Run/Stop mode.

Disabled

Enabled,
Disabled

Memory Board (for 20/40/64-Point Micro PLCs only) Sets up use of

an optional memory module in the 64 Point Micro
PLC.

RAM Only

RAM and
Flash

Port 2
Configuration

(for 20/40/64-Point Micro PLCs only) Sets up the
use of a Port 2 option module in the PLC. The port
2 options can then be configured.

None

RS232/USB,
Ethernet,
RS485. None

Sweep Mode

Normal: sweep runs until it is complete.
Constant: sweep runs for time specified in Sweep
Timer.

Normal

Normal,
Constant

Constant
Sweep Time

If Constant Sweep mode was selected, a Constant
Sweep Time (in milliseconds) can be specified.

100mS

–

200mS

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16.4

Port 1 Configuration

Port 1, an RS-232 compatible serial port, is used to communicate with the programmer or
for other communications. Configuration options for Port 1 are described below. See
Chapter 24: for more information about port protocols for the Micro PLC. Note that
VersaMax Micro PLC and Nano PLC models prior to Release 3.0 do not support all port
modes.

Feature

Description

Default

Choices

Port Mode

Defines the protocol for Port 1. This selection
determines which of the additional
parameters below are configurable.

SNP

SNP, RTU only, Serial
I/O

Port Type

SNP, RTU: Configures the serial port as the
slave or master device.

Slave

Master, Slave

Data Rate
(bps)

Data transmission rate (in bits per second).

19200

300, 600, 1200, 2400,
4800, 9600, 19200,
38400

Flow Control The type of flow control used on the port. Not

editable.

None

Parity

Determines whether parity is added to words Odd

Odd, Even, None

Stop Bits

Number of stop bits used in transmission.
(Most serial devices use one stop bit; slower
devices use two.)

1, 2

Bits /
Character

Determines whether the CPU recognizes 8-bit
or 7-bit characters.

8 bits

7 bits, 8 bits

Timeout

SNP only: Specifies the timeout value used by
the protocol.

Long

Long, Medium,
Short, None

Turn Around
Delay

SNP only: Turnaround delay time in ms

0-255

SNP ID

SNP only: 8-byte network identifier for Port 1. (none)

(none)

Station
Address

RTU: Station address of the slave on the RTU
network

1 to 247

Serial I/O: A hexadecimal identifier used for
Serial I/O protocol.

0 to FF hex

16.4.1

Timing Note for RTU Communications

When using RTU communications, it may be necessary to increase the RTU timeout
configured on the master device as the PLC slave scan time increases. It is not necessary to
change the configuration of the VersaMax CPU when the port is used in RTU slave mode.

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16.5

Port 2 Configuration

On 23- and 28-point Micro PLCs, the built-in Port 2 provides general-purpose
communications using SNP, SNPX, RTU slave and Serial I/O protocols. Port 2 can also be
configured as an SNP/SNPX master. On 20-, 40-, and 64-point Micro PLCs, an optional RS-
232, RS-485, or USB port module can be installed and configured as Port 2.

Port 2 configuration can be changed through the configuration utility, or by using the
COMMREQ (communications request) function block within a logic program.

Feature

Description

Default Choices

Port Mode

Defines the protocol for Port 2. This
selection determines which of the
additional parameters below are
configurable.

SNP

RS232/USB: SNP, Serial
I/O, RTU Only

RS485: SNP, Serial I/O,
RTU Only

Port Type

For Port Modes SNP and RTU Only:
Configures the serial port as a slave (the
responding device) or a master (the
initiating device) in a master/slave
system.

Slave

Slave, Master

Data Rate (bps)

Data transmission rate (in bits per
second).

19200

RS-232/USB and RS-485:
300, 600, 1200, 2400,
4800, 9600, 19200,
38400
Ethernet: 19200, 38400,
175000

Flow Control

The type of flow control used on the port.
Not editable.

None

Parity

Determines whether parity is added to
words

Odd

Odd, Even, None

Stop Bits

For SNP, Serial I/O and Modbus with RS-
485: Number of stop bits used in
transmission. (Most serial devices use one
stop bit; slower devices use two.)
For Modbus RTU, when using no parity,
Stop Bits should be set to 2. If using Even
or Odd parity, Stop Bits should be set to 1.

1, 2

Bits / Character

For Serial I/O: Determines whether the
CPU recognizes 8-bit or 7-bit characters.

8 bits

7 bits, 8 bits

Timeout

For SNP: Specifies the timeout value used
by the protocol.

Long

Long, Medium,
Short, None

Turn Around
Delay

For SNP: Turnaround delay time in ms

0-255

SNP ID

For SNP and RTU only: 8-byte network
identifier for Port 2.

(none)

1 to 247

Station Address

For Serial I/O: A hexadecimal identifier
used for Serial I/O protocol.

0 to FF

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Feature

Description

Default Choices

Duplex Mode

For RS485 RTU

2-Wire

2-Wire, 4-Wire

For RS485 Serial I/O

Point to
Point

2-Wire, 4-Wire,
Point to Point

16.6

Configuring Analog I/O Parameters

For Micro PLC and Expansion Units with analog I/O, each analog channel can be individually
configured to operate in either voltage or current mode. If current mode operation is
selected, the range can then be configured as either 4-20mA or 0-20mA.

For Nano PLCs with one analog input, the mode is always voltage. Reference addresses can
also be selected as described above.

Mode

Parameters

Default

Voltage or current mode

Voltage, Current

Voltage

Current range selection

–

20mA

–

20mA

–

20mA

Voltage range selection
(Expansion Inputs Only)

0 to 10,000mV
-10,000 to 10,000mV

0 to 10,000mV

16.7

Configuring High-Speed Counter, PWM or
Pulse Train

All Nano PLCs and Micro PLCs with DC inputs are configurable for a mix of High-Speed
Counting features. Nano PLCs and Micro PLCs with DC outputs can also be configured with
Pulse-Width Modulation and Pulse Train/Ramping Pulse Train features (only for 20-, 40-, or
64-point Micro PLC).

Configuring High-Speed Counter, Pulse Train, Ramping Pulse Train, Motion Support, or
PWM operation enables specific features and assigns them to dedicated references on the
PLC. You can mix high-speed counting and regular I/O functions on the same Micro PLC, as
long as there are references available.

16.7.1

HSC, PWM, and PTO Settings

First, the basic High-Speed Counter, Pulse-Width Modulated, or Pulse Train Output
Settings should be selected by double-clicking on HSC/PWM/PTO*.

Figure 180

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Selecting the Counter Type

Selecting a Counter Type sets up how the module’s internal

High-Speed Counter features

will be used. The choice for Counter Type determines which of the subsequent parameters
can be configured. Counter Type choices depend on the type of Micro or Nano PLC being
configured:

Counter Type Configuration for PLC Module Configurable for Each Channel

PLC

3 Type A 4 Type A 1 Type

A,
1 Type B

4 Type A
32

1 Type A,
1 Type B
32

Standard Counter PWM Pulse

Train

Pulse
Train
with
Ramp

Motion
Support

All Nano PLCs Yes

Yes

All Micro PLCs
except UAA003
and UAA007

Yes

UAA003, 007 Feature Not Available

20-/40-/64-
Point

Micro

PLCs

Yes

The Counter Type selection made for the module determines, in turn, the features that can
be configured for the channels.

•

3 Type A (for Nano PLCs only). Configures a Nano PLC High-Speed Counter
functionality as three separate channels. Each channel can then be configured as a
Type A Counter, OR as a standard, Pulse Train, or Pulse-Width Modulated output.

•

1 Type A / 1 Type B. Combines the functionality of channels 1, 2, and 3 into one Type
B counter. For Micro PLCs, channel 4 can then be independently configured as a Type
A Counter, OR as a standard, Pulse Train, or Pulse-Width Modulated output. Micro-
20, -40, and -64 PLCs also provide Pulse Train with Ramp channel configuration.

•

4 Type A (for all Micro PLCs). Configures the Micro PLC High-Speed Counter
functionality as four separate channels. Each channel can then be configured as a
Type A Counter, OR as a standard, Pulse Train, or Pulse-Width Modulated output.
Micro-20, -40, and -64 PLCs also provide Pulse Train with Ramp channel
configuration.

•

1 Type A / 1 Type B_32) (for all Micro-20 and Micro-40 PLCs, and for Release 3.60 or
later Micro-64 PLCs only). Combines the functionality of channels 1, 2, and 3 into
one Type B counter. Channel 4 can then be independently configured as a Type A
Counter, OR as a standard, Pulse Train, Pulse-Width Modulated, or Motion Support
output.

•

4 Type A_32 (for all Micro-20 and Micro-40 PLCs, and for Release 3.60 or later Micro-
64 PLCs only). Configures the Micro PLC High-Speed Counter functionality as four

Rel. 3.6 or later.

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separate channels. Each channel can then be configured as a Type A Counter, OR as
a standard, Pulse Train, Pulse-Width Modulated, or Motion Support output.

Output Stop Mode

This setting determines what outputs will do when the system is in Stop mode.

Normal means that High-Speed Counter outputs continue to respond to the counter inputs
and standard outputs turn off. Preset outputs continue to operate as though the CPU were
present, changing state to reflect the counter Accumulators. Ramp Pulse and Motion
outputs (for Micro-20, -40, and -64 PLCs) stop immediately when the PLC is put into Stop
Mode.

Force Off means all Preset outputs are turned off and remain off until the CPU returns to
normal operation.

Hold Last means Preset outputs retain current levels and do not reflect the counter
Accumulators.

Reference Address, Length

The range of CPU memory references that will be used by the High-Speed Counter features.
Many of these memory references have specific defined functions as described in Chapter
17:. They can be used by the application program to send parameters and commands to a
High-Speed Counter, and to monitor counter operation.

16.7.2

Channel #1, 2, 3, 4 Parameters

After selecting the Counter Type on the HSC/PWM/PTO Settings tab, each channel can be
configured on its Channel tab:

Figure 181

The Channel Functions that can be configured here depend on the Counter Type and Micro
PLC type, as explained previously. Parameters for all Channel Functions are described below.

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Channel Function: Counter

In Counter mode, the channel will operate as a High-Speed Counter (Type A or Type B). See
Chapter 17: for a description of this feature. The following additional parameters can then
be configured:

Counter Status: specifies whether the counter output is enabled.

Count Direction: for a Type A Counter only, this specifies whether count inputs increment
(Up) or decrement (Down) the accumulator.

Count Mode: defines whether the counter wraps if the count limit is reached (Continuous)
or if it stops at the counter limit (Single Shot).

Preload/Strobe: selects the function of the Preload/Strobe Input.

Preload/Strobe Input Edge: for Type A counters only. This non-editable parameter specifies
that the Zero to Positive transition is used for a preload or strobe input.

Count Input Edge: for Type A counters only, this parameter specifies which transition of the
counter is used as the count input. Zero to Positive is a low-to-high transition. Positive to
Zero is a high-to-low transition.

Time Base (mSec): specifies the timebase for the Counts-per-Timebase register: The default
is 1000mS. Range is 10mS to 65530mS.

High Limit:

the counter’s upper limit. It must be greater than the low limit.

Low Limit:

the counter’s lower limit.

ON Preset:

defines the counter’s ON preset.

OFF Preset:

defines the counter’s OFF preset.

Preload Value: the Preload value for the counter.

Channel Function: PWM

Selecting PWM as the Channel Function sets up the channel as a Pulse-Width Modulated
output. See Chapter 17: for a description of this feature.

The Counter Statu

s parameter enables or disables the channel’s PWM output.

Channel Function: Pulse Train

Selecting Pulse Train as the Channel Function sets up the channel as a Pulse-Train output.
See Chapter 17: for a description of this feature.

The Counter Status

parameter enables or disables the channel’s Pulse Train Output.

Channel Function: Standard

Selecting Standard as the Channel Function sets up the channel as a standard output.

The Counter Status parameter enables or disables the Standard output.

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