Events and Callbacks

Execute functions triggered by specific events

Functions

`opccallback`	Event information for OPC Toolbox callbacks
`cleareventlog`	Clear event log, discarding all events
`showopcevents`	Event log summary for OPC Toolbox events

`ErrorFcn`	Callback function file to execute when error event occurs
`EventLog`	Event information log
`EventLogMax`	Maximum number of events to store in event log
`ShutDownFcn`	Callback function file to execute when OPC server shuts down
`TimerFcn`	Callback function file to execute when predefined period passes
`TimerPeriod`	Period between timer events
`CancelAsyncFcn`	Callback function file to execute when asynchronous operation is canceled
`DataChangeFcn`	Callback function file to execute when data change event occurs
`ReadAsyncFcn`	Callback function file to execute when asynchronous read completes
`RecordsAcquiredFcn`	Callback function file to execute when `RecordsAcquired` event occurs
`RecordsAcquiredFcnCount`	Number of records to acquire before `RecordsAcquired` event occurs
`StartFcn`	Callback function file to execute immediately before logging starts
`StopFcn`	Callback function file to execute immediately after logging stops
`WriteAsyncFcn`	Callback function file to execute when asynchronous write completes