•
The status of an evaluated protective field is logical 1 if the protective field is clear.
•
The status is logical 0 if the protective field is interrupted.
•
The status of an unallocated protective field defaults initially to logical 1.
If you evaluate the status of the protective fields using Flexi Soft, then on the
field mode
tab first select the
Transfer unallocated fields as interrupted
option.
Further topics
•
"EFI status information and control commands", page 116
7.8.1
External device monitoring (EDM)
The EDM checks if the contactors actually de-energize when the protective device is
tripped. If you activate external device monitoring, then the safety laser scanner checks
the contactors after each interruption of the protective field and prior to the machine
restart. External device monitoring is then able to detect if one of the contactor’s con‐
tacts is welded, for instance. In this case the external device monitoring places the sys‐
tem in a safe operational status and the OSSDs are not switched back to the ON state.
The table shows how the device reacts if the external device monitoring detects a con‐
tactor malfunction:
Table 16: Behavior of the device on a contactor malfunction
Without internal restart
interlock or with restart
delay
•
The system locks completely (lock-out).
•
The error message
appears in the 7-segment display.
•
The safety laser scanner switches its OSSDs to the OFF state.
•
The LED
Ê
is illuminated.
•
The error message
appears in the 7-segment display.
External device monitoring can be configured in the CDS.
NOTE
b
If the external device monitoring function is not being used, leave the inputs dis‐
connected.
Further topics
•
7.9
Restart
Overview
You can configure the restart behavior as follows:
•
•
With restart delay
•
The type of restart can be configured in the CDS.
CONFIGURATION
7
8012029/ZA20/2019-11-14 | SICK
O P E R A T I N G I N S T R U C T I O N S | S3000 Cold Store
75
Subject to change without notice
