Pilz PSS SB HYD, Basic license - Manual (Page 256)

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Examples
Modular Block System: Hydraulic Presses
Safety gate monitoring with automatic start and manual restart,
category 2
Block used: SB066/ST_K4
Cyclical function test on the gate:
The following application requires a cyclical function test of the safety gate
(open/close safety gate).
This requirement is met by carrying out a function test using a 1/0-pulse
edge at the input parameter
MEin.
Set operating mode:
The following operating mode is set for this application:
ARSt = 0: Reset lock activated (manual restart)
The operator must reset each time the safety gate opens
(input parameter
Strt).
NFkT = 1 No function test on safety gate when PSS starts up/resets
AuSt = 1 Automatic start
WARNING!
When a safety-related device provides a start or restart signal, the start or
restart shall take place automatically only if a hazardous situation cannot
exist (EN 954, 03/97).