---#WORK IN PROGRESS # ---- Small project on Modbus RTU Slave implementation using RS232
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In the example, I have started with Read of Modbus Holding register value. Not all specs of Modbus standard are covered. I shall try to cover them in my subsequent uploads.
List of uploads:
- Ch01 : Holding register Read. Basic with exception codes 01, 02,03 implemented.
- Ch02 : Discrete Coil Read, Discrete Input Read and Analog Input Read are added.
- Ch03 : Implementation of Inter character break timeout & Inter-frame delay timers for processing of Modbus messages, Calculation & comparision of Received Modbus Frame's CRC
- Ch04 : Final zip file implemented with write functions and diagnostic function code.