Connection State

Associated with: OPC UA Servers

This status attribute indicates the state of the connection between Geo SCADA Expert and the OPC UA server. The possible connection states are:

• Disconnected—Geo SCADA Expert is not connected to the OPC UA server. This might be for any of a number of reasons, such as:
  • The OPC UA server’s configuration is incomplete—for example, the Server URL has not been specified (see Checking for Invalid Configuration).
  • The OPC UA server is not In Service (in which case, the server will typically display an ‘Out of Service’ Quality).
• Starting—This indicates that Geo SCADA Expert is currently establishing a connection to the OPC UA server. This state is typically fleeting, after which it changes to, either the Healthy or Failed state.
• Healthy—Geo SCADA Expert has successfully connected to the OPC UA server.
• Failed—Geo SCADA Expert has not successfully established or maintained a connection to the OPC UA server. To ascertain further information about the reason for this state, use the Display Alarms pick action to display the OPC UA Server’s Alarms List, or the Display Events pick action to display the OPC UA Server's Events List.
• Stopping—This indicates that Geo SCADA Expert is currently disconnecting from the OPC UA server. This state is typically fleeting, after which it changes to the Disconnected state.

Also see Connection State Alarm.