Applies To:
  • CitectSCADA 5.3x, v5.4x, v5.5x, v6.x, v7.0, v7.1
  • Vijeo Citect
  • PowerLogic SCADA
Summary:
When a project is configured such that it has modems on the primary IO Server
but no COMX board on the standby IO Server, the Standby will refuse to start.
The error message "Failed to find a COMX board defined on this server. A COMX
board definition is required for communication with remote I/O Devices" is
displayed.

Solution:
A work around is to assign a COMX board to the standby IO Server. This issue will be resolved in the next Citect service pack for v7.0 and v7.1
Keywords:
modem COMX

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