Chapter
8
Operating Instructions
miniTwin2
62
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8013482/YT85/2016-02-23
Subject to change without notice
Fault diagnosis
8
Fault diagnosis
This chapter describes how to identify and rectify errors and malfunctions during the
operation of the safety light curtain.
8.1
In the event of faults or errors
Cease operation if the cause of the malfunction has not been clearly identified!
Stop the machine if you cannot clearly identify or allocate the error and if you cannot safely
rectify the malfunction.
The lock
C
out status
In case of certain faults or an erroneous configuration, the system can go into the lock
A
out
status. The safety light curtain signals this with a flashing ERR LED
Red
.
Rectify the cause of the fault as per Tab. 10.
Switch off and on again the voltage supply for the miniTwin2 in the control cabinet or
remove and re-fit the system connection (M12 × 4 + FE) on both Twin Sticks.
8.2
SICK support
If you cannot rectify an error with the help of the information provided in this chapter,
please contact your local SICK representative.
8.3
Error displays of the diagnostics LEDs
This section describes the meaning of the error displays of the diagnostics LEDs and how
to respond. You will find a description of the status indicators in section 3.4 “Status
indicators” on page 16.
Display
Possible cause
Rectification of the error
Red
ERR
Blue
1
Blue
2
Blue
3
Blue
4
Blue
5
System fault
Switch the voltage supply for the
miniTwin2 off and back on again
(renewed power-up).
Check all connections.
Check the FE connection.
Check cable laying for interference (e.g.
EMC).
Red
ERR
Blue
1
Blue
2
Blue
3
Blue
4
Blue
5
Short-circuit,
cross-circuit or
cable fault
Check the reset button for correct
function. The button may be defective or
stuck.
Check the wiring for short-circuits to
24 V or 0 V.
Check the wiring between host and
guest or between host, guest and guest.
Check the wiring between the two
OSSDs.
WARNING
Tab. 10: Error displays of the
LEDs
