4.3.6.4.3 Sensor gap monitoring
Overview
Sensor g
ap monitoring allows signals from the muting sensors and the muting end
by ESPE function to be ignored for a defined period without removing a valid muting
condition.
Sensor gap monitoring (muting sensor)
If a mut
ing sensor briefly becomes clear, i.e. an object gap is detected, the deactivated
muting signal continues to be interpreted as an active signal and muting is maintained.
Muting is only ended if one of the muting sensors is clear for longer than 0.5 s.
The following applies to sensor gap monitoring (muting sensor)
•
Sensor gap monitoring is always active
•
Only one of the muting sensors may be clear (deactivated) briefly. If the 2nd
muting sensor is also clear, muting is ended.
•
Muting is ended if one of the muting sensors is clear (deactivated) for longer than
0.5 s
Sensor gap monitoring (ESPE)
If t
he ESPE is becomes clear for a short time, i.e. an object gap is detected, muting is
maintained.
Muting is only ended if the ESPE is clear for longer than 0.5 s.
The following applies to sensor gap monitoring (ESPE):
•
Sensor gap monitoring (ESPE) is active during exit monitoring in combination with
the muting end by ESPE function
•
The ESPE is allowed to be clear for a short time, i.e. to detect a short object gap
•
Muting is ended if the ESPE is clear for longer than 0.5 s
4.3.6.4.4 Concurrence monitoring
Overview
C
oncurrence monitoring is configured for protecting the safety application from tamper‐
ing (e.g. covering an optical sensor).
Principle of operation
C
oncurrence monitoring checks whether both muting sensors are actuated within
24 hours. If a muting signal does not appear within this period, muting is not triggered.
Muting can only be triggered again if all muting sensors are clear.
Concurrence monitoring is always active.
4.3.6.4.5 Total muting time
The total muting time limits the maximum duration of muting to 24 hours, i.e. muting
t
hen ends at the latest once the total muting time has passed.
The total muting time is always active.
4.3.6.4.6 Cross-circuit monitoring
Overview
T
he muting signal inputs are monitored for cross-circuits.
The device expects the muting signals to arrive at different times. If the muting signals
are detected simultaneously by the device, the OSSDs switch to the OFF status.
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ROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | deTec4 Ex II 3GD 8023872/18YZ/2021-01-14 | SICK
Subject to change without notice
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