Can I add function code 20 to Modbus Library?

[sophia3]

Hello Everyone,

I am trying to read the bulk memory of PLC using modbus Library. I have set-up a modbus TCP/IP driver using labview and read 125 registers from holding register. But when I added the function code 20 to the cluster input of MB Ethernet Master Query Read Input Register(Poly) function palette. The function indicates error. How can I add the Read file Record to Modbus Master Query? The mapping for PLC references to Modbus is 6yxxxx.

Best Regards,

Sophia

[K C]

Duplicate post