Hello, Two Modbus RTU masters can communicate in the same network ??
M Thread Starter monika May 4, 2023 #1 Hello, Two Modbus RTU masters can communicate in the same network ??
D David_2 May 4, 2023 #2 By the Modbus standard, no, because packet collisions result in poor or no communications. With a separate bus arbitrator module between the Masters and the slave bus, Yes. See these earlier discussions on the same topic: https://control.com/forums/threads/serial-port-expander-for-modbus-master-device.48045/ https://control.com/forums/threads/modbus-many-to-many-connection.15318/ Three bus arbitrator devices that have been mentioned: MULTII-PORT™ Model 366-10P-XYZ https://www.miille.com/366-10p-xyz.htm ICP tSH-73x serial port sharer arbitrator https://www.icpdas.com/en/product/tSH-725 ADF HC67146 bus arbitrator bus arbitrator https://www.adfweb.com/Home/products/modbus_modbus.asp?frompg=nav3_1
By the Modbus standard, no, because packet collisions result in poor or no communications. With a separate bus arbitrator module between the Masters and the slave bus, Yes. See these earlier discussions on the same topic: https://control.com/forums/threads/serial-port-expander-for-modbus-master-device.48045/ https://control.com/forums/threads/modbus-many-to-many-connection.15318/ Three bus arbitrator devices that have been mentioned: MULTII-PORT™ Model 366-10P-XYZ https://www.miille.com/366-10p-xyz.htm ICP tSH-73x serial port sharer arbitrator https://www.icpdas.com/en/product/tSH-725 ADF HC67146 bus arbitrator bus arbitrator https://www.adfweb.com/Home/products/modbus_modbus.asp?frompg=nav3_1