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With the SLG-2 light grid, this happens optically via beam 1 and the last beam (starting
from the cable). If both synchronization beams are interrupted at the same time, a
Sync error
is displayed as the diagnosis. In this state, the SLG-2 light grid can perform
detection, but it can no longer detect which beams are interrupted.
In this mode, object measurement (
Beam status
, height, width...) is no longer possible.
For measuring tasks, it must therefore be ensured that one of the two sync beams is
free during the measurement process.
8.5
Troubleshooting
LED indicator/fault pattern
Cause
Measure
Yellow LED does not light up,
no object in the path of the
beam
Distance between sender and
receiver is too large:
Sender and receiver not
aligned correctly.
Check application.
Align the sender with the
receiver and teach in.
Alignment aid is available,
.
Yellow LED lights up, although
an object is in the path of the
beam.
Object too small or is reflected
and diverted away or is trans‐
lucent.
Check application, opaque
object?
Where applicable, remove the
cause of the reflection
Start teach-in process again
Yellow LED flashes at 8 Hz for
≤
5 s.
Teach-in faulty
Check application
Align the sender with the
receiver and teach in.
Yellow LED flashes at 8 Hz for
as long as an object is located
in the optical path.
Object is blocking all beams.
Ensure that the last or first
beam is always unobstructed
(this is only relevant for meas‐
uring applications).
Yellow LED flashes at 2 Hz for
as long as no object is located
in the optical path.
Device is dirty or poorly
aligned.
Clean sender and receiver with
plastic cleaner and / or align.
Restart teach process
Yellow LED flashes at an
undefined frequency even
though an object is in the opti‐
cal path
Interference with an adjacent
sensor
Swap the arrangement of the
sender and receiver
Restart teach process
Yellow LED flashes at 8 Hz for
> 5 s, no object in the beam
path
Check cabling (short circuit).
Both LEDs do not light up.
No voltage supply
Perform
Power cycle
.
If the error is still present, con‐
tact customer service.
8
DIAGNOSTICS AND TROUBLESHOOTING
48
O P E R A T I N G I N S T R U C T I O N S | SLG-2
8026014/2021-06-10 | SICK
Subject to change without notice