Transistor
Member
I need to get a CompactLogix PLC to talk to an oil temperature controller which has a Modbus serial interface. Since the PLC has no serial port I would like to use an Ethernet-serial server.
I have various Moxa and Brainboxes Ethernet-serial RS232/485 devices to hand but I notice that the various vendors supply Modbus-specific devices.
Q1. What do the Modbus versions of these do that an RS485 won't?
Q2. What would be the difference in configuration in the PLC if both can be used?
Many thanks.
I have various Moxa and Brainboxes Ethernet-serial RS232/485 devices to hand but I notice that the various vendors supply Modbus-specific devices.
Q1. What do the Modbus versions of these do that an RS485 won't?
Q2. What would be the difference in configuration in the PLC if both can be used?
Many thanks.