Heartbeat Monitor

The OEM application’s OPC UA client writes to a heartbeat variable called HeartBeatFrom<App> in the local OPC UA server in the LEC Server instance. <App> refers to the OEM application’s name or abbreviation. Each LEC Server instance monitors this heartbeat variable, and if it is not updated within the configurable timeout, the LEC Server instance will go offline.

Note: You can disable the monitor in the batch file. See the description of the <active> property in the #HeartBeatFromApp section for details.

The OPC UA server in each LEC Server instance has a heartbeat variable called HeartbeatMon that is updated every 10 seconds. The application’s OPC client can monitor this heartbeat variable for purposes of managing failover.