Ok I have beat my head against the wall for long enough trying to research this.
Im running a AB SLC5/03 and a HMI from Parker P11
The PLC and HMI are communicating on DH485. The communication cable is a RJ45 to the PLC and a DB9 Female at the HMI.
Problem im having is I need to communicate with the plc with out disconnecting the HMI. The RS232 port on the PLC seems to have an issue with communication.
is it possible to run a switch or hub between the PLC and HMI so I can plug my 1747UIC RJ45 plug into the switch or hub and be able to communicate with the PLC?
Any help would be much appreciated.