SICK WLL80 Analog - Page 66

Table 78: Troubleshooting
LED/fault pattern Cause Measures
The message “Teach error 1” appears on
the display (yellow LED flashes)
The received light value at the teach-in
point during the teach-in process is too
low to set a corresponding switching
threshold (in combination with the con‐
figured teach-in offset).
Increase the received light value at the
teach-in point during the teach-in proc‐
ess by doing the following:
•
Ensure that the fibers are fully and
correctly inserted into the openings
provided for them (check for cor‐
rectly inserted fibers via the status
indicators)
•
Set a slower response time (if possi‐
ble)
•
Increase the sender power (if possi‐
ble)
•
Decrease the teach-in offset value
•
When using proximity fibers: Reduce
the distance between the detection
object and the proximity fibers
•
When using through-beam fibers:
Align the emitter and receiver fibers
exactly with each other
The message “Teach error 2” appears on
the display (yellow LED flashes)
The received light value at the teach-in
point during the teach-in process is in
the saturation range (≥9,999digits). It
is therefore not possible to set a corre‐
sponding switching threshold (in combi‐
nation with the configured teach-in off‐
set).
When using a proximity fiber: Back‐
ground is too close to the proximity fiber
or background is too shiny or sender
power is too high.
When using through-beam fibers: Dis‐
tance between sender and receiver
fibers is too small or sender power is
too high.
Decrease the received light value at the
teach-in point during the teach-in proc‐
ess by doing the following:
•
Set the sender power to “Auto”
(automatic reduction of the sender
power when the received light value
is in the saturation range or when
>5,000digits)
•
Set a faster response time (if possi‐
ble)
•
Decrease the sender power (if possi‐
ble)
•
Decrease the teach-in offset
•
When using a proximity fiber:
Increase the distance between the
detection object and the proximity
fiber
•
When using through-beam fibers:
Increase the distance between the
sender and receiver fibers
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O P E R A T I N G I N S T R U C T I O N S | WLL80 Analog 8027947 /2022-12-14 | SICK
Subject to change without notice