AutomationDirect CLICK PLUS PLC User manual

4
4
4
Chapter
Chapter
Chapter
PLC CommuniCations
In This Chapter...
Introduction................................................................................................................. 4-2
PLC Communication Ports Specifications ................................................................... 4-3
LED Status Indicators................................................................................................... 4-4
3 Steps to Using the CLICK PLC Communications ..................................................... 4-6
Typical Communication Applications.......................................................................... 4-7
W-1: USB Port Wiring ................................................................................................ 4-11
W-2: Com Port 2 (RS-232) Wiring............................................................................. 4-12
W-3: Com Port 1 (Ethernet) Wiring.......................................................................... 4-16
W-4: Com Port 3 Wiring............................................................................................ 4-18
C-1: USB Port Setup................................................................................................... 4-19
C-2: Com Port 1 (Ethernet) Setup ............................................................................ 4-20
C-3: Wireless LAN (WLAN) Setup.............................................................................. 4-21
C-4: Bluetooth Setup ................................................................................................. 4-22
C-5: Com Port 2 Setup (Modbus RTU) ..................................................................... 4-23
C-6: Com Port 2 Setup (ASCII).................................................................................. 4-24
C-7: Com Port 3 Setup (Modbus RTU) ..................................................................... 4-25
C-8: Com Port 3 Setup (ASCII).................................................................................. 4-26
P-1: Modbus Slave (Server) Programming ............................................................... 4-27
P-2: Modbus Master Programming (Modbus RTU) ................................................. 4-31
P-3: Modbus Client (Modbus TCP) Programming ................................................... 4-36
P-4: ASCII Receive Programming .............................................................................. 4-42
P-5: ASCII Send Programming .................................................................................. 4-45

Introduction
This chapter explains the communications ability of the CLICK PLUS PLC system for
exchanging data between the PLC unit and other connected serial devices. It covers:
• Electrical connections used for communications
• Networking routing between the PLC and other devices,
• Setting the port communication parameters,
• Selecting the protocols and the available data addressing types to use, and
• Ladder logic program instructions that make it all work together.
All CLICK PLUS PLCs have a built-in micro-B USB port for programming.
The C2-01CPU and C2-03CPU have an RS-232 port, designated Port 2. The port uses a 6-pin
RJ12 phone type jack. It is a general purpose port, user configurable, with its communication
parameters within CLICK Programming Software, C0-PGMSW. Port 2 can be used as a
Modbus RTU master or slave protocol device, or handle ASCII data In or Out (ASCII stands
for American Standard Code for Information Interchange and defines a character encoding
method for text that is used in computers and other communication devices. Details can be
found by doing a search for ASCII on the internet).
The C2-03CPU also has a 3-pin RS-485 port, designated Port 3. Like Port 2, Port 3 is a
general purpose port with its communication parameters being user configurable from the
programming software. Port 3 can be used as a Modbus RTU master or slave protocol device,
or handle ASCII data In or Out.
The C2-01CPU and C2-03CPU have a built-in Ethernet communications port.
The C2-02CPU and C2-03CPU have an antenna port capable of both Bluetooth and WLAN
communications.
The CLICK PLUS PLCs can be networked to other CLICK PLCs, data input devices (barcode
readers, weight scales, etc.), and/or data output devices (serial printers, serial text displays, etc.).
It is also possible to network the CLICK PLUS PLC to other 3rd party PLCs and devices that
have the ability to communicate using the Modbus RTU and TCP protocols.
The final part of the PLC Communications chapter contains explanations and examples of the
various ways the Send and Receive programming instructions can be used to perform Modbus
RTU protocol and ASCII data communications between devices.
There are three different data addressing types that can be selected when using the Modbus
RTU protocol from the Send and Receive instructions. They are, CLICK addressing, Modbus
984 addressing, or Modbus HEX addressing. The CLICK addressing makes it convenient
to exchange data between CLICK PLCs. The other addressing choices are selected based on
the Modbus protocol addressing the networked devices are using. For details on the Modbus
protocol, visit www.modbus.org.
NOTE: The Modbus RTU Master is identified as the device that controls the exchange of data between
itself and any connected slave device. There can only be one master on the network. When the CLICK
PLC is the master, it is easily identified. It will be the PLC in the network with the Send and/or Receive
instructions using the Modbus protocol in its ladder logic program.
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Chapter 4: PLC Communications

C2-01CPU
Port 1 Pin Descriptions
1TX+ Transmit Data (+)
2TX- Transmit Data (-)
3RX+ Receive Data (+)
4NC Not connected
5NC Not connected
6RX- Receive Data (-)
7NC Not connected
8NC Not connected
Com Port 1 Specifications
Use: Programming and Ethernet Communication
Physical: 8 pin, RJ45, Ethernet
Communication Speed (Mbps): 10/100
Protocol: Modbus TCP (client/server), EtherNet/IP
Implicit and Explicit (adapter server), DNS, DHCP, NTP,
MQTT
1
8
8 pin RJ45 Phone
Type Jack
Port 2 Pin Descriptions
10V Power (-) connection (GND)
25V Power (+) connection
3RXD Receive data (RS-232)
4TXD Transmit data (RS-232)
5RTS Request to send
60V Power (-) connection (GND)
Port 3 Pin Descriptions
1+ (plus) Signal A (RS-485)
2– (minus) Signal B (RS-485)
3LG Logic Ground(0 V)
3 Pin
Te
rminal Block
1
6
6 pin RJ12 Phone
Type Jack
Port 3
Port 2
Port 1
Com Port 2 Specifications Default
Use: Serial Communication -
Physical: 6 pin, RJ12, RS-232 -
Communication speed (baud): 2400, 4800,
9600, 19200, 38400, 57600, 115200 38400
Parity: odd, even, none Odd
Station Address: 1 to 247 1
Data length: 8 bits (Modbus RTU) or 7, 8
bits (ASCII) 8 bits
Stop bit: 1,2 1
Protocol: Modbus RTU
(master/slave) or ASCII in/out
Modbus
RTU
Com Port 3 Specifications Default
Use: Serial Communication -
Physical: 3 pin, RS-485 -
Communication speed (baud): 2400, 4800,
9600, 19200, 38400, 57600, 115200 38400
Parity: odd, even, none Odd
Station Address: 1 to 247 1
Data length: 8 bits (Modbus RTU) or 7, 8
bits ( ASCII) 8 bits
Stop bit: 1,2 1
Protocol: Modbus RTU
(master/slave) or ASCII in/out
Modbus
RTU
RS232
(Port 2)
Ethernet
(Port 1)
microUSB
RS232
(Port 2)
Ethernet
(Port 1)
microUSB
RS485
(Port 3)
Bluetooth
& WLAN
microUSB
Bluetooth
& WLAN
C2-02CPU C2-03CPU
See Chapter 2: Specifications for the micro USB port and antenna port specifications.
PLC Communication Ports Specifications
The CLICK PLUS PLC units have several built-in communications ports, as shown below.
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Chapter 4: PLC Communications

LED Status Indicators
C2-02CPU
POWER LED (Green)
On Power Good
USB Low
Power Mode
Power Failure
Off
Blink
ERROR LED (RED)
On Self Diagnostic
Error
Self Diagnostic
Warning
No ErrorOff
Blink
WLAN LED (Green)
On Link
Activity
No Link
Off
Blink
BLUETOOTH LED (Blue)
On Link
Activity (per packet)
Blink
Disabled in PLC* (200ms flash)
No Link
Off
Blink
Pairing Mode (500ms flash)
Blink
*Error - Bluetooth disabled in PLC
(SC60) is On. Pairing mode disabled.
RUN LED (Green)
On CPU Run Mode
Initializing
Analog Module
CPU Program
Mode
Off
Blink
C2-01CPU
Blink
LNK/ACT LED (Green)
On Connected to the network
Communicating
Disconnected from the network
Off
100MBIT LED (Orange)
On Communicating at 100Mbps
Communicating at 10Mbps or
disconnected from the network
Off
TX & RX LED (Green)
On Com Port Data Active
No CommunicationOff
ERROR LED (RED)
On Self Diagnostic
Error
Self Diagnostic
Warning
No ErrorOff
Blink
POWER LED (Green)
On Power Good
USB Low
Power Mode
Power Failure
Off
Blink
RUN LED (Green)
On CPU Run Mode
Initializing
Analog Module
CPU Program
Mode
Off
Blink
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Chapter 4: PLC Communications

DirectLogic Devices That Do Not Work With CLICK PLCs
The CLICK PLUS PLC does not support K-sequence protocol, so the following DirectLogic
devices do not work with the CLICK PLUS PLC:
D2-HPP DV-1000
D4-HPP-1
LED Status Indicators (continued)
C2-03CPU
Blink
LNK/ACT LED (Green)
On Connected to the network
Communicating
Disconnected from the network
Off
100MBIT LED (Orange)
On Communicating at 100Mbps
Communicating at 10Mbps or
disconnected from the network
Off
TX & RX LED (Green)
On Com Port Data Active
No CommunicationOff
ERROR LED (RED)
On Self Diagnostic
Error
Self Diagnostic
Warning
No ErrorOff
Blink
WLAN LED (Green)
On Link
Activity
No Link
Off
Blink
MICRO SD LED (Green)
On Mounted
Access
No SD Mounted
Off
Blink
POWER LED (Green)
On Power Good
USB Low
Power Mode
Power Failure
Off
Blink
BLUETOOTH LED (Blue)
On Link
Activity (per packet)
Blink
Disabled in PLC* (200ms flash)
No Link
Off
Blink
Pairing Mode (500ms flash)
Blink
*Error - Bluetooth disabled in PLC
(SC60) is On. Pairing mode disabled.
RUN LED (Green)
On CPU Run Mode
Initializing
Analog Module
CPU Program
Mode
Off
Blink
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Chapter 4: PLC Communications

Example:
To connect a barcode reader that sends ASCII data to Com Port 2:
3 Steps to Using the CLICK PLC Communications
We offer an easy 3-step method for using the communication features of the CLICK PLC.
The following pages show the devices that you may connect to the CLICK PLC Com ports.
Use the table below to locate information on communications for your particular application.
As you can see in the table, each step has subcategories. For each step, find the subcategory
description that best describes your application. Use the subcategory references (W-x, C-x,
and P-x.) to find more information on these topics in this chapter. See the example below.
CLICK PLC Communications
Step Subcategory Reference Subcategory Description Page
Step 1
Wiring
W-1 USB 4-11
W-2 Com port 2 (RS-232) 4-12
W-3 Com port 1 (Ethernet) 4-16
W-4 Com port 3 (RS-485) 4-18
Step 2
Com Port Setup
C-1 USB setup 4-19
C-2 Com port 1 (Ethernet) setup 4-20
C-3 WLAN setup 4-21
C-4 Bluetooth setup 4-22
C-5 Com port 2 setup (Modbus RTU) 4-23
C-6 Com port 2 setup (ASCII) 4-24
C-7 Com port 3 setup (Modbus RTU) 4-25
C-8 Com port 3 setup (ASCII) 4-26
Step 3
Programming
P-1 Modbus Slave (Server) programming 4-27
P-2 Modbus Master programming (Modbus RTU) 4-31
P-3 Modbus Client programming (Modbus TCP) 4-36
P-4 ASCII Receive programming 4-42
P-5 ASCII Send programming 4-45
Com Port 2
Wiring
Pages
Com Port
Setup Pages
Programming
Pages
Step 1 Step 2 Step 3
P-4
W-2 C-6
Barcode
Reader
Refer to these three reference page sections.
W-x C-x P-x
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Chapter 4: PLC Communications

Port 1
Port 2
DV-1000CBL
serial cable
C-more Micro-Graphic
Panel (Monochrome
models only)
Typical Communication Applications
The diagrams on the following four pages illustrate the typical uses for the CLICK PLUS
PLC’s communication ports. Typical serial communication applications are continued on the
next three pages.
Port 2 (RS-232) – Modbus RTU Slave Mode Only
PC Another CLICK PLC
CLICK PLUS PLCs Other Devices
Supporting Modbus RTU
Master Mode
Port 2
NOTE: CLICK’s RS-232 port can provide 5VDC to power one monochrome Micro-Graphic panel. If
two C-more Micro-Graphic panels are connected to both ports, then at least one of the panels must be
powered by a C-more Micro DC power adapter, EA-MG-P1 or EA-MG-SP1, or another 24VDC power
source. Color C-more Micro-Graphic panels must also be powered from a separate 24VDC source.
P-1
W-2 C-5
Example
C-more and C-more
Micro-Graphic Panel
TIP: C-more Micro-Graphic panels
(monochrome models only) can get 5VDC
power from RS-232 Port.
The Color Micro-Graphic panel or the
second Monochrome Micro-Graphic
panel needs a separate 24VDC power
source (see the note below).
RS-232 Port
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Chapter 4: PLC Communications

PC Another CLICK
Ethernet PLC
Modbus TCP Client (Master) Devices
C-more Panel
Modbus TCP Server (Slave) Devices
P-3
W-3 C-2
Another CLICK
Ethernet PLC
P-1
W-3 C-2
CLICK PLUS PLC Other Devices
Supporting
Modbus TCP
Client Mode
Port 1
Other Devices Supporting
Modbus TCP Server Mode
ViewMarq Display
GS1 Drive
SR55 Soft Starter
GS3 Drive
Port 1 (Ethernet) – Modbus TCP
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Chapter 4: PLC Communications

Port 2 (RS-232) – Modbus RTU or ASCII
PC Another CLICK PLC
Other Devices
Supporting Modbus RTU
Master Mode
Serial Printer
Serial Text
Display
Barcode
Reader Weight Scale
Devices that SEND ASCII messages
Modbus RTU Slave Devices
Other devices
that can receive
ASCII data.
Devices that RECEIVE ASCII messages
Other devices
that can send
ASCII data.
C-more and C-more
Micro-Graphic Panel
See Note on previous page about
connecting a C-more Micro-Graphic
panel to RS-232 Port.
P-5
W-2 C-6
P-4
W-2 C-6
ASCII
Modbus RTU
P-2
W-2 C-5
P-1
W-2 C-5
Another CLICK PLC
Other Devices
Supporting Modbus RTU
Slave Mode
Port 2
CLICK PLUS PLCs
Modbus RTU Master Devices
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Chapter 4: PLC Communications

Port 3 (RS-485 – Modbus RTU or ASCII)
PC Another CLICK PLC
Other Devices
Supporting Modbus RTU
Master Mode
Serial Printer
Serial Text
Display
Barcode
Reader Weigh Scale
Devices that SEND ASCII messages
Modbus RTU Slave Devices
Other devices
that can receive
ASCII data.
Devices that RECEIVE ASCII messages
Other devices
that can send
ASCII data.
C-more and C-more
Micro-Graphic Panel
P-5
W-4 C-8
P-4
W-4 C-8
ASCII
Modbus RTU
P-2
W-4 C-7
P-1
W-4 C-7
Another CLICK PLC
Other Devices
Supporting
Modbus RTU
Slave Mode
SOLO Temperature
Controller
Port 3
Modbus RTU Master Devices
CLICK PLUS PLCs
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Chapter 4: PLC Communications

W-1: USB Port Wiring
USB Port wiring pinout is shown below.
Wiring Strategy
Connect any CLICK PLUS CPU to a USB A port on a Windows PC, using cable
USB-CBL-AMICB6 or equivalent.
W-1
USB Port Pin Descriptions
1VBUS 5V Power supply in
2D- Differential signal -
3D+ Differential signal +
4NC Not connected (ID not used)
5GND Ground
1 - 5
USB Cable
ADC Part #
USB-CBL-AMICB6
PC with
USB A Port
CLICK Plus
PLC
NOTE: The CLICK PLUS CPU can be supplied 5VDC power from a PC over the USB port when no
24VDC power is applied, with the following capabilities and restrictions
Available:
• Programming over Port 1, Port 2, and Port 3
• Firmware update
• CLICK Factory Default and CLICK Project Loader Tools
• Modbus Server/Slave over Port 1, Port 2, and Port 3
• Option Slot module can be identified in software
Not Available:
• RUN mode is disabled
• WLAN and Bluetooth are disabled
• Access to the microSD Card from
software is disabled
CLICK PLUS PLC Hardware User Manual, 1st Edition, Rev. B – C2-USER-M 4-11
Chapter 4: PLC Communications

W-2: Com Port 2 (RS-232) Wiring
Com Port 2 wiring pinout is shown below.
NOTE: Com port 2 can provide 5VDC; however, the 5VDC power can be used only for the C-more Micro-
Graphic panel. AutomationDirect does not guarantee that the CLICK PLUS PLC will work correctly when
any other device uses 5VDC from these Com ports. Please also remember these Com ports can provide
enough power only for one C-more Micro-Graphic panel.
Wiring Strategy
The following pages cover five case scenarios for connecting com port 2:
Case 1: Connect Com Port 2 to a PC.
Case 2: Connect Com Port 2 to another CLICK PLC.
Case 3: Connect Com Port 2 to a C-more or C-more Micro-Graphic panel.
Case 4: Connect Com Port 2 to an RS-422 or RS485 port on another device(s).
Case 5: Connect Com Port 2 to an RS-232 port on another device.
Port 2 Pin Descriptions
10V Power (-) connection (GND)
25V Power (+) connection
3RXD Receive data (RS-232)
4TXD Transmit data (RS-232)
5RTS Request to send
60V Power (-) connection (GND)
1
6
6 pin RJ12 Phone
Type Jack
W-2
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Chapter 4: PLC Communications

Case 1: Connect Com Port 2 to a PC.
You can connect Com Port 2 to a serial com port or USB port on the PC.
1. Connect to a serial port
Case 2: Connect Com Port 2 to another CLICK PLC
You can use cable D0-CBL.
In this configuration, one of the CLICK/CLICK PLUS PLC units needs to be the network
master and the other is the network slave. Connect the D0-CBL on Com Port 2 on the master
PLC unit side.
WARNING: The ZL-RJ12-CBL-2 cable cannot be used for this purpose.
CLICK PLUS PLC
PC
PC Serial
Programming Cable
D2-DSCBL
CLICK PLUS PLCL
C
CLICK PLC
D0-CBL Cable
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Chapter 4: PLC Communications

Case 3: Connect Com Port 2 to a C-more or C-more Micro-Graphic panel
Please use the following cables to make your connections.
Case 4: Connect Com Port 2 to an RS-422 or RS485 port on another device(s).
You need a RS-232 to RS-422/485 converter in this case. We recommend our FA-ISOCON
as the converter.
The recommended cables to connect the FA-ISOCON to other devices:
• Belden 8103 for the RS-422
• Belden 9842 for 2-wire RS-485
• Belden 9843 for 4-wire RS-485
C-more Graphic Panel Cable Part Number
C-more Touch panels EA-2CBL (3m) or OP-2CBL (2m)
C-more Micro-Graphic
Panels
DV-1000CBL if the panel receives 5VDC power from the CLICK PLC com port. (Monochrome
panels only; color panels must be powered from a separate 24VDC power source. Please refer
to the note on page 4-6 for details.)
EA-2CBL (3m) or OP-2CBL (2m) if the panel receives 24VDC power from other source.
Port 1
Port 2
DV-1000CBL
serial cable
C-more Micro-Graphic
Panel (Monochrome
models only)
CLICK PLC FA-ISOCON
Cable included
with FA-ISOCON
Connect to RS-422/RS-485
ports on other devices
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Chapter 4: PLC Communications

Case 5: Connect Com Port 2 to an RS-232 port on another device
You need to cross the RTD and TXD signal lines and connect 0V on both com ports.
You can make your own cable. However, we offer two products that make your wiring much
easier:
1. ZIPLink feed-through module and cable
1 0V 0V
TXD
RXD
3 RXD
4 TXD
CLICK
Com Port 2 RS-232 Port on
Another Device
CLICK PLC
ZL-RTB-RJ12
ZL-RJ12-CBL-2
CLICK PLC
Pigtail
ZL-RJ12-CBL-2P
2. ZIPLink pig-tail cable
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Chapter 4: PLC Communications

W-3: Com Port 1 (Ethernet) Wiring
Com Port 1 (Ethernet) supports 10/100 Base-T Ethernet with an RJ-45 style connector.
You can use both straight and cross over cables with Com Port 1.
Wiring Strategy
• There are two wiring methods to connect to devices
which support Modbus TCP protocol.
• Case 1: Connect Com Port 1 to a device that supports
Modbus TCP protocol directly such as a PC.
• Case 2: Connect Com Port 1 to other devices that support
the Modbus TCP protocol via a switch or hub.
Case 1: Connect Com Port 1 to a device that supports the Modbus TCP protocol
directly such as a PC.
In this illustration a PLC unit is connected directly to a PC.
W-3
Port 1 Pin Descriptions
1TX+ Transmit Data (+)
2TX- Transmit Data (-)
3RX+ Receive data (+)
4NC Not connected
5NC Not connected
6RX- Receive Data (-)
7NC No connection
8NC No connection
1
8
8 pin RJ45 Phone
Type Jack
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Chapter 4: PLC Communications

Case 2: Connect Com Port 1 to other devices that support the Modbus TCP
(client/server) protocol via a switch or hub.
NOTE: Com Port 1 can communicate with any number of servers (slaves) using the Receive and/or
Send instructions. However, Com Port 1 can communicate with up to 4 servers at the same time. If the
ladder program has sent a message to 4 different servers and tries to send a message to another server,
the CLICK PLUS PLC unit disconnects the first server and establishes a connection with the new server,
maintaining a total of 4 servers.
NOTE: Com Port 1 can communicate with up to 3 clients (masters). If a client attempts to establish
communication with Com Port 1 while it is communicating with 3 clients, the CLICK PLUS PLC unit replies
with an error to the fourth client.
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Chapter 4: PLC Communications

W-4: Com Port 3 Wiring
Com Port 3 supports 2-wire RS-485.
Wiring Strategy
You need to connect all + signal terminals in the network together. You will also need to
connect all – signal terminals together. It is optional to connect the logic ground.
NOTE: The resistance of the termination resistors needs to match the impedance of the communication
cable.
Add a termination
resistor between the
+ and – terminals on
the last device.
RS-485
Add a termination resistor between
the + and – terminals on Port 3.
CLICK
Com Port 3
RS-485 Port on
another device
RS-485 Port on
another device
+
–
LG
+
–
LG
+
–
LG
Optional (Some devices may
not have this terminal.)
W-4
3 Pin
Terminal Block
NOTE: Use a repeater if connecting more than 32 slaves to Port 3.
Port 3 Pin Descriptions
1+ (Plus) Signal A (RS-485)
2- (Minus) Signal B (RS-485)
3LG Logic Ground (0 V)
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Chapter 4: PLC Communications

C-1: USB Port Setup
The CLICK PLUS USB port is only used to connect to the CLICK programming software.
When a CLICK PLUS device is first connected to a USB port on a Windows PC, a driver is
loaded to allow the CLICK PLUS device to emulate a standard serial port. The CLICK PLUS
will show up as a USB Serial Device in under Ports in Windows Device Manager.
To connect via USB port, click Connect in the PLC menu, then select USB as the port type.
Select the COM port assigned to the USB Serial Device. All other parameters can be left at
their default settings.
C-1
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Chapter 4: PLC Communications

C-2: Com Port 1 (Ethernet) Setup
Select the Function tab located in the Navigation window of the CLICK Programming
Software and double click “Com Port 1 Setup” as shown below.
The Com Port Setup Details dialog box will come into view as shown below.
C-2
Select the Function tab,
then double click Com
Port 1 Setup.
Click the Help
button for online
Com Port Setup
Details help.
Setup the parameters to
match your application.
NOTE: The communication port settings are saved in the project file. The project must be transferred to
the CLICK PLUS PLC in order for any port setting changes to take effect.
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Chapter 4: PLC Communications