OPC Item Property 5012

As described in the chapter OFS settings, this OPC item property can be read during a browse operation to discover if a variable is configured as a time stamp variable in Control Expert application.

Time stamp variables can be added to ##TSEventsGroup##. For more details, refer to topic Time Stamped Events Configuration.

<<system>>!#ClientAlive Specific Item

This item can be periodically written to inform OFS that the OPC client is alive. If OFS detects that the client is missing, OFS deactivates all active OPC groups including ##TSEventsGroup##.

For more details, refer to topic Time Stamped Events Configuration in OPC Factory Server User Manual.

#PLCQualStatus Specific Item

This item can be activated to diagnose the connection state of a PLC device or an event source device.

For more details, refer to topic Specific Item in OPC Factory Server User Manual.