ABB AC500-S Safety User Manual page 326

Configuration and programming
AC500-S Libraries > SafetyBlocks_PLCopen_AC500_v22.lib
Typical Timing Diagram
Fig. 113: Timing diagram for SF_TestableSafetySensor
The following conditions force a transition to the Error state:
n Test time overrun without delayed sensor feedback.
n Test without sensor signal feedback.
n Invalid static reset signal in the process.
n Plausibility check of the monitoring time setting.
In the event of an error, the S_OSSD_Out output is set to FALSE and remains in this safe state.
Once the error has been removed and the sensor is on (S_OSSD_In = TRUE) – a reset removes the error
state and sets the S_OSSD_Out output to TRUE.
326 AC500-S 30.03.2017