With help of Codesys FAQ below, i was able to implement Modbus RTU feature dynamically with IEC Code.
1) If i change the master transmission setting from RTU to ACSII, do I have to convert word arrays to char arrays manually as send buffers? Or Modbus Serial Master library automatically convert word buffers to chars buffers?
2) Does Codesys Modbus Serial Slave (Server) determine type of transmission automatically depending on incoming packet? (RTU or ASCII)
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