Applies To:
  • CitectSCADA 2.00 2.01 3.00 4.00
Summary:
If both the Primary and Standby IODevices are on the same server and they have the same IODevice name there is no possibility whatsoever to disable the Standby IODevice. 

Solution:
If both the Primary and Standby IODevices are on the same server and they have the same IODevice name you can disable them individually by using the:

IODeviceControl("PLC1,P",1,1); // for the Primary
IODeviceControl("PLC1,S",1,1); // for the Standby

where,
  P is for the Primary and
  S is for the Standby

NOTES -
1. The function IODeviceInfo() also accepts this syntax for getting information about a primary or a standby device.
2. If you have more than one standby device on the same server there is currently no way of using either function for other than the first standby device.
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