Serial RS422/RS232 on PLC to Display

[PowderMonkey]

Hi

I wanted to control 4 Displays to switch input from a PLC with serial interface.
The Display can be controlled via its serial port with ASCII command.
How can I achieve that?

Thank you

 

[RussB]

If RS-232 you will want one port on the PLC for each HMI. If RS-485 and all of the HMI units use the same protocol you will need to verify that the protocol selected supports multi-drop and that the PLC supports multidrop on this protocol.