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Try to write my own code to connect Quantum PLC, 140 NOE 771 01 Ethernet Module, using Modbus TCP/IP. I used Analyser to capture the packets when PLC and Unity Pro connected. every packets look likes:
Ethernet part/ 80 2C 00 00 00 05 00/ 5A 00 01 00
In Modbus 5A must be the function code? What does it mean? anyone can decode the ADU of the Modbus message?
Thank you in advance.
hung
Ethernet part/ 80 2C 00 00 00 05 00/ 5A 00 01 00
In Modbus 5A must be the function code? What does it mean? anyone can decode the ADU of the Modbus message?
Thank you in advance.
hung
