SF_GuardLocking_2 (FB)

FUNCTION_BLOCK SF_GuardLocking_2

This FB controls an entrance to a hazardous area via an interlocking guard with guard locking (“four state interlocking”).

InOut:

Scope	Name	Type	Initial	Comment
Input	Activate	BOOL	FALSE	Activation of the FB.
	S_Guard	BOOL	FALSE	Monitors the guard interlocking. Can be connected to the GuardOut of the SF_Guard FB. FALSE: Guard open. TRUE: Guard closed and guarded area safe.
	S_SafetyActive	BOOL	FALSE	Status of the hazardous area (EDM), e.g., based on speed moni-toring or safe time off delay. FALSE: Machine in “non- safe” state. TRUE: Machine in safe state.
	S_GuardLock	BOOL	FALSE	Status of the mechanical guard locking. FALSE: Guard is not locked. TRUE: Guard is locked.
	UnlockRequest	BOOL	FALSE	Operator intervention – request to unlock the guard. FALSE: No request. TRUE: Request made.
	S_StartReset	BOOL	FALSE	Start behaviour of safety FB
	S_AutoReset	BOOL	FALSE	Behaviour on error of safety FB
	Reset	BOOL	FALSE	Manual reset of FB
Output	Ready	BOOL	FALSE	Activation of the FB. TRUE indicates that the FB is activated and the outputs results are valid, FALSE the FB is not active and the program is not executed.
	S_GuardLocked	BOOL	FALSE	Interface to hazardous area which must be stopped. FALSE: No safe state. TRUE: Safe state.
	S_UnlockGuard	BOOL	FALSE	Signal to unlock the guard. FALSE: Close guard. TRUE: Unlock guard.
	SafetyDemand	BOOL	FALSE	Output indicating that the FB is active and the primary safety function is demanded (e.g. related to the safety functionality).
	ResetRequest	BOOL	FALSE	Output which can be used to signal the operator to press the reset functionality to continue.
	Error	BOOL	FALSE	Error flag
	DiagCode	WORD	0	Diagnostic register