Figure 21: Exit monitoring
!
Hazardous area
"
ESPE
The following is true for exit monitoring:
•
O
verride is active. The number of override statuses is limited to 5.
•
The muting end by ESPE function is active
•
Concurrence monitoring is configured
•
A total muting time is active
•
The muting signal inputs are monitored for cross-circuits
•
If the ESPE does not always detect a muting end caused by irregularities in the
material or the means of transport exactly, muting is ended after a muting end
delay of 200 ms at the latest
•
If a muting sensor is clear, sensor gap monitoring will expire, meaning that a
muting sensor may not be clear longer than 0.5 s
•
If the sensor gap monitoring of 0.5 s has been exceeded, muting ends after a
muting hold time of 4 s
Exit monitoring can be combined with partial blanking.
Calculating minimum distance
C
alculating minimum distance without using a muting connector:
•
L
1
≥ v × 0.060 s
•
v × t > L
1
+ L
2
Calculating minimum distance with use of a muting connector:
•
L
1
≥ v × 0.122 s
•
v × t > L
1
+ L
2
The following rules apply:
•
L
1
< 200 mm; minimum distance between the beams of the ESPE and the detec‐
tion of the muting sensors in m
•
v = Speed of the material (e.g. of the conveyor belt) in m/s
•
t = Muting hold time in s (with active muting end by ESPE function)
•
L
2
= Length of the material in conveying direction in m
Further topics
•
"Cr
oss-circuit monitoring", page 44
•
"Data sheet", page 127
PROJECT PLANNING 4
8023872/18YZ/2021-01-14 | SICK 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
41
Subject to change without notice
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