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Every time when MB_MASTER contacts node one, it gets error 8383, which means "Error in the data address or address outside the valid range of DATA_PTR"

If somebody could help me with translating this Raw Data Poll:
01 - node number
03 - function code
00X20 - register DEC 32 (is it 40032 or 400032 for function code 03?)
00 09 - quantity of registers (also tried with 1 word only and 1 dword)
84 06 - CRC16 - I am not sure if MB_MASTER instruction sends it automatically..

I need to get at least one word of feedback, then I can manage.

Hi,

The maximum size of a MODBUS RTU frame is 256 bytes;

1 byte for slave address, 1 byte for code function, 2 bytes for error checking and up to 252 bytes for Data.

So, you May exceeded the modbus data length, try with data length less than 126words(252 bytes).

If your data length is greeter than 126 words, you should transmit it in different cycles.

Best, 

Ro.Mousavi