!
A1
A2
$
"
§
%
Figure 17: Muting ends as soon as the ESPE is clear again
!
ESPE
"
Time at which muting ends
§
Material
$
Transportation equipment
%
Hazardous area
The following applies to the muting end by ESPE function:
•
The entire length of the material and means of transport must be detected by the
muting sensors or the ESPE.
•
Muting is terminated when the ESPE detects an object gap of more than 0.5 s and
a muting end delay of 0.2 s has expired.
•
Muting is ended too early if one of the muting sensors remains clear for longer
than 0.5 s, i.e. the sensor gap monitoring has been exceeded.
•
If the light path of the ESPE does not become clear, exit monitoring is ended at the
latest once the muting condition is no longer satisfied.
4.3.5.5.3
Muting hold time
A muting hold time is active in combination with the exit monitoring function.
If one of the muting sensors in the hazardous area is no longer engaged and the sensor
gap monitoring of 0.5 s has been exceeded, the muting hold time of 4 s begins. ESPE
protection is bypassed within this time period and material or a means of transport can
pass through the ESPE without the machine stopping.
Muting ends if the muting hold time of 4 s has passed.
4.3.5.5.4
Concurrence monitoring
Overview
Concurrence monitoring is configured for protecting the safety application from tamper‐
ing (e.g. covering an optical sensor).
Principle of operation
The concurrence monitoring checks whether either both muting sensors when exit mon‐
itoring is configured, or both muting sensors of a muting sensor pair when entry/exit
monitoring is configured have been activated within the space of 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
PROJECT PLANNING
32
O P E R A T I N G I N S T R U C T I O N S | deTem4 LT Muting A/P
8024802/2020-07-17 | SICK
Subject to change without notice