Troubleshooting - SICK GRL18 Instrucciones De Operación

4
COMMISSIONING
5

Troubleshooting

Table Fault diagnosis
8
The sensitivity is adjusted with the potentiometer (type: 270°). Clockwise rotation:
operating reserve increased; counterclockwise rotation: operating reserve reduced. We
recommend setting the potentiometer to "Maximum." A lower operating reserve may be
necessary for depolarizing surfaces.
The sensor is adjusted and ready for operation. Refer to graphics C and G to check the
function. If the switching output fails to behave in accordance with graphic C, check
application conditions. See section Fault diagnosis.
(PNP)
1
q
0
1
0
Q
(NPN)
1
q 0
Q 1
0
Figure: C
Figure: G
The Troubleshooting table indicates measures to be taken if the sensor stops working.
LED indicator/fault pattern
Green LED does not light up
Green LED does not light up
Green LED does not light up
Cause
No voltage or voltage below
the limit values
Voltage interruptions
Sensor is faulty
Measures
Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions)
Ensure there is a stable power
supply without interruptions
If the power supply is OK,
replace the sensor
8016955.1ABM / 21.12.2020 | SICK
Subject to change without notice