Changing the Modbus-RTU slave address on Rockwell Micro 820 1

[rmore]

I am using a Rockwell Micro 820 configured as a Modbus-RTU slave device.

Is there a way for the user to change the slave address without giving him access to the application code?

 

[danw2]

Check out the RMCC (Run Mode Configuration Change) function described on pages 23-26 (pdf) of Micro820 Programmable Controllers User Manual

It sounds like it might do what you're asking:

 

[rmore]

That works. And it's fairly straightforward once the MSG_CIPGENERIC function is properly configured.

I am now able to change the Modbus RTU unit addresses from the HMI or via jumpers on PLC inputs.

I was also able to use the same method to set the Ethernet IP address.

Thanks You!