P-3: Modbus Client (Modbus Tcp) Programming - AutomationDirect C0-USER-M Manual

Chapter 4: PLC Communications
P-3

P-3: Modbus Client (Modbus TCP) Programming

Instructions
The CLICK PLC has two instructions to exchange data with Modbus servers through the Com
Port 1; the Receive and Send instructions.
• Receive instruction: Read data from external Modbus server.
• Send instruction: Write data to external Modbus server(s).
To use these instructions, double click Receive or Send in the Instruction List window as
shown below.
Select Com Port 1 that you are going to use.
Select Com Port 1
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CLICK PLC Hardware User Manual, 6th Edition, Rev. F – C0-USER-M
Instruction List
Double click Receive or Send
in the instruction List to use it
in the ladder program.