This opposite behavior is monitored by the safety controller. When the muting function
is active, the TE signal can be used to extend the maximum duration of the muting func‐
tion, such as if the conveyor has to be stopped while the protective field of the Type 4
electro-sensitive protective device is occupied by material.
The following four signal combinations are possible:
Table 7: Possible signal combinations
MR signal
TE signal
Meaning
High
Low
Muting function request
Low
High
No muting function request
High
High
Time extension for muting function required
1)
Low
Low
Error
1)
This signal combination is only valid following successful initiation of the muting function. Otherwise a
fault is output.
Signals for timing set selection
Up to four optional signals can be used by the higher-level control to select different
timing sets for multiple conveyor speeds or different material sizes. These signals must
be coded as 1 of n.
For more information
see "1 of n timing sets", page 43
.
Up to four timing sets can be configured and selected accordingly via signals. The fol‐
lowing table describes the signals required to select the sets, depending on the number
of configured timing sets. Configuring only one set is equivalent to deactivating the Tim‐
ing Set selection function.
The value 1 means logical High (24 V signal) and the value 0 means logical Low.
“-” means that this signal is not required.
Table 8: Relationships between configured sets
Number of con‐
figured timing
sets
Signal Timing Set
1
Signal Timing Set
2
Signal Timing Set
3
Signal Timing Set
4
1 Timing Set configured
Timing Set 1
-
-
-
-
2 Timing Sets configured
Timing Set 1
1
0
-
-
Timing Set 2
0
1
-
-
3 Timing Sets configured
Timing Set 1
1
0
0
-
Timing Set 2
0
1
0
-
Timing Set 3
0
0
1
-
4 Timing Sets configured
Timing Set 1
1
0
0
0
Timing Set 2
0
1
0
0
Timing Set 3
0
0
1
0
Timing Set 4
0
0
0
1
ELECTRICAL INSTALLATION
6
8021675/ZV26/2019-05-13 | SICK
O P E R A T I N G I N S T R U C T I O N S | Safe Entry Exit
25
Subject to change without notice