Rox
I have now RPI running as Modbus TCP server/slave with OpenPlc, with AdvancedHMI,  if I add modbus slave to be connected with USB-RS485 to the RPI, do my RPI need to be configured as Modbus Master? or the slave device could run as an IO expansion?

Great software! Thank you.

Thanks, Rox
Quote 0 0
thiagoralves
All the configuration you need to make is in the Slave Devices page on OpenPLC. The slave device will run as an IO expansion to OpenPLC.
Quote 0 0