CommandExecutionMonitoring (FB)¶

FUNCTION_BLOCK CommandExecutionMonitoring

Command execution monitoring of of BOOL commands.

This function block does monitor a control device (often an actuator - for example a shut-off valve) if it’s operatig as expected. In case the service indication (or operating-state feedback) of the control device is different than the control signal provided to the control device longer than a given margin time an error is issued.

InOut:

Scope	Name	Type	Initial	Comment
Input	xEnable	BOOL	TRUE	Enable error detection - xEnable := FALSE doesnt reset detected error
	xControl	BOOL		Control signal
	xSvci	BOOL		Service indication
	tMargin	TIME	TIME#5s0ms	Margin time
	xReset	BOOL	FALSE	Reset detected error
	itfDateTimeProvider	Util.IDateTimeProvider	Globals.g_dtpDateTimeProvider	Source for the current date and time information in milliseconds since 1.1.1970 00:00:00.000
Output	xError	BOOL		Error indication
	eErrorID	Error		Error ID