Hi,
On a project, we have so far been able to establshi communication between a -L63 Controllogix PLC and a Thrid Party DCS. We defined a PLC2 Tag of 6000 registers (0 - 6000)in the PLC. Then we configured the Channel 0 to its default settings wich is Point to Point, no Handshake, etc, except for station # (110).
Upon connecting the serial cable to the DCS interface, communication was good and DCS writes data in the PLC at the exact memory location that were expected. For example, date and time data are continiously updated.
The problem we have is when we want to send a Message (MSG) to the DCS. The .EN bit always stays ON and the .DN bit stays OFF. Path used is 2,0. I then used Path 1,1 to loop back the MSG in the PLC and it worked just fine. When I change the Path to "2,X", I get the .ER bit for X is not a valid address. changing the Channel 0 to master or Salve results in lost of RS-232 communication.
Why is the Contollogix unable to send a message when it accept and replies data to the DCS???
On a project, we have so far been able to establshi communication between a -L63 Controllogix PLC and a Thrid Party DCS. We defined a PLC2 Tag of 6000 registers (0 - 6000)in the PLC. Then we configured the Channel 0 to its default settings wich is Point to Point, no Handshake, etc, except for station # (110).
Upon connecting the serial cable to the DCS interface, communication was good and DCS writes data in the PLC at the exact memory location that were expected. For example, date and time data are continiously updated.
The problem we have is when we want to send a Message (MSG) to the DCS. The .EN bit always stays ON and the .DN bit stays OFF. Path used is 2,0. I then used Path 1,1 to loop back the MSG in the PLC and it worked just fine. When I change the Path to "2,X", I get the .ER bit for X is not a valid address. changing the Channel 0 to master or Salve results in lost of RS-232 communication.
Why is the Contollogix unable to send a message when it accept and replies data to the DCS???