Modbus Communication between HMIGXU3512 and TM241CEC24R not working well

[SESA693423]

I'm trying to write values from the HMIGXU3512 to the M241 through modbus communication and it did not work with me , the reading is working well but writing not working , so what is the suitable 

1) Function code ?

2) Address on Vijeo designer 

3) Address on Machine expert

and any other configuration, so that the communication be established well.

Thanks in advance

[Ricard]

Hello there,

As you say, if the reading is OK, the writing has to work. Then.... How I say a lot of time, "the truth is in there". 🤔

Put a manageable switch between the PLC and the HMI. In this way you will be able to see, with Wireshark software, the response of the PLC to the writing of the HMI.

Try to perform the same test with software such as Modbus Poll

Good luck!

Ricard