Additional Functions; Fault Diagnosis - SICK SureSense HL18 Manual De Operación

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Additional functions

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Fault diagnosis

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Image: G
Alarm output: The sensor (HL18) features a pre-failure notification output ("Q2" in con‐
nection diagram [B], if the alarm option is selected), which issues a notification if the
signal strength of the light being received is not sufficient. Possible causes: Sensor or
reflector is contaminated, sensor is out of alignment. In the good state: LOW (U
excessively contaminated: HIGH (>+U
Health output: The sensor (HL18) features a health status notification output ("Q2" in
connection diagram [B], if the health option is selected), which issues a notification if
the signal strength of the light being received is sufficient. Possible causes, if the signal
strength is not sufficient: Sensors are contaminated, sensors are out of alignment, or
cable is damaged. In the good state: HIGH (>+U
the event of cable interruption: LOW (U
Time types: HL18 with optional On-delay or Off-Delay adjustment: t0 = no time delay, t1
= time delay when object is detected, t2 = time delay when no object is detected. The
time setting can be selected using the potentiometer according to A.
dark switching
2
1
Timer stages can be set from 0 to 2 seconds.
Light/dark switch: The sensor is in light switching mode when optional light/dark poten‐
tiometer is rotated to the "L" position. The sensor is in dark switching mode when optio‐
nal light/dark potentiometer is rotated to the "D" position. The green power supply LED
will flash once when the mode is changed.
Table indicates which measures are to be taken if the sensor stops working.
- V). The LED indicator flashes in this case.
V
- V); if excessively contaminated or in
V
< V). The LED indicator flashes in this case.
V
light switching
1
2
< V); if
V
t = 1
t = 2
8017290 | SICK
Subject to change without notice