Associated with: Advanced OPC Servers
The Advanced OPC Server Connection State attribute displays one of the following state values:
- Disconnected—ClearSCADA is not connected to the OPC DA server. This might be for any of a number of reasons, such as:
- The server’s configuration is incomplete—for example, the Server ProgID has not been specified (see Checking for Invalid Configuration in the ClearSCADA Guide to Core Configuration).
- The server is not In Service (in which case, the server will typically display an ‘Out of Service’ Quality).
- Starting—This indicates that ClearSCADA is currently establishing a connection to the OPC DA server. This state is typically fleeting, after which it changes to, either the Healthy or Failed state.
- Healthy—ClearSCADA has successfully connected to the OPC DA server.
- Failed—ClearSCADA has not successfully established or maintained a connection to the OPC DA server. To ascertain further information about the reason for this state, use the Display Alarms pick action to display the Server’s Alarms List. or the Event Journal (see Event Lists).
- Stopping—This indicates that ClearSCADA is currently disconnecting from the OPC DA server. This state is typically fleeting, after which it changes to the Disconnected state.