Configuration instructions:
The delay times to be configured correspond to the time required for a 200 mm convey‐
ing line at the respective conveyor speed. It is forbidden to set this value above 4 s.
T
clearance
= T
termination
=
0.2 m
Vconveyor
Tclearance corresponds to the specified delay time after the protective device has been
released and until the muting function is ended.
The delay time for the lower function block can be reduced or even deactivated (config‐
ured time = 0) if a quicker response is required to the end of the request from the
higher-level control system.
WARNING
Serious injury may occur due to unreliable presence detection.
Monitoring the 200 mm conveying distance after unlocking the protective field of the
Type 4 electro-sensitive protective device ensures that a gap larger than 200 mm
between the conveyed material will not be tolerated. Monitoring a 200 mm line after
the end of the request for the muting function ensures that people located between or
behind the material being transported will be detected.
The calculation of T
clearance
and T
termination
is safety-related.
7.6.2
Configuration of
Time monitoring
“Time monitoring general” network
Figure 6: “Time monitoring general” network
This network includes two
Clock generator
function blocks, which must be configured.
The configuration of both clock generator function blocks depends on the CPU cycle
time of the respective project. The basic CPU cycle time of a project with an FX3-CPU0
module is 4 ms, but this can rise if additional function blocks or other FX3-CPUx mod‐
ules are used.
Configuration instructions:
The settings for the upper
Clock generator
function block only have to be configured if the
CPU cycle time of the finished project file does not equal 4 ms. If the cycle time is not
4 ms, the value of the clock period must be changed so that the resulting clock period
equals 6 s. The values for the most common cycle times are set out in the table below:
CONFIGURATION
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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
31
Subject to change without notice