Diagnosis; Diagnostic Elements - SICK PLS Serie Manual Del Usuario

PLS

7. Diagnosis

7.1 Diagnostic elements

Three LEDs displaying the operation status of the PLS are lo-
cated on the top of the PLS housing.
The green and red LEDs are allocated to the safety output.
The yellow LED signals – depending on the setting of the PLS
– an object in the warning field and/or dirt contamination of the
front screen. In conjunction with the red LED, it also indicates
whether the system is waiting for acknowledgement by the
user.
Should the device fail the self-test (system error), this is also
displayed by the yellow LED.
Diagnosis with PLS LEDs:
Status
Protective field clear
Object in protective field
Object in warning field
Waiting for restart
Dirt warning *
Dirt contamination *
Self-test failed **
* Dirt contamination of the PLS front screen:
see chapter 7.2 Maintenance!
** Self-test failed: see chapter 7.3 Service!
The LEDs give the first diagnosis of the system status.
Authorized personnel have, with the help of the user software
supplied with the unit, access to an extensive diagnostic sys-
tem (see chapter User Software in the PLS technical descrip-
tion).
178
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
green
8 008 321/M844/06-05-02 Operating Instructions • PLS
GB
yellow red
1Hz
1Hz
4Hz