ray Posted June 8, 2022 Report Share Posted June 8, 2022 When I try to create two Modbus TCP/IP slaves I get the following error: "Both Slaves have been set to the same communication protocol. Slave1 may be set to TCP/IP, while Slave2 is set to RS485" I don't understand why it gives an error if I have different IDs for each slave. Quote Link to comment Share on other sites More sharing options...
Gabriel Franco Posted June 8, 2022 Report Share Posted June 8, 2022 It´s a normal behavior. If you want your PLC act as slave (named server in Modbus TCP), you configure it under PLC Communications | Protocols | MODBUS | Slaves, either Ethernet or RS485. Then, it will be another slave in the network. If you want your PLC act as a master (named client in Modbus TCP), you must configure all your slaves under PLC Communications | Protocols | MODBUS | Masters, either Ethernet or RS485. Then, it will be the master in the network. All slaves must have unique IP (Ethernet) or ID (RS485). 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.