Applies To:
  • CitectSCADA 5.xx
  • CitectHMI 5.xx

If Modicon Telemecanique PL7 (PLC programming Software) is disconnected from the PLC, CitectSCADA takes a few seconds to initiate the driver on start-up and then goes online successfully.

As soon as I connect to the PLC with PL7 PRO (using the XIP driver) the communication to CitectSCADA (using UNITE driver) stops, and #COMs appear. If I disconnect PL7 software from the PLC, communications resume a short time after...

Is there a fix for this problem?


You have got same XWAY (network.station) address for your CitectSCADA and PL7 . You will need to change either one of them, as these address need to be unique on XWAY network.

XWAY address is not one per PC, but rather one for PL7, one for CitectSCADA. This explains why the "Send Total" and "Recv Total" numbers in the XWAY driver diagnostics stop increasing as soon as you disconnect from PL7 software, BUT CitectSCADA is still running...


PL7, XIP, Network, Station, UNITE