SICK HTE18 Series, Operating Instructions Manual

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Time types
Time types: HTE18 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.
Timer stages can be set from 0 to 2 seconds.
8 Troubleshooting
The Troubleshooting table indicates measures to be taken if the sensor stops working.
Table 11: Troubleshooting
LED indicator/fault pattern Cause Measures
Yellow LED does not light up
even though the light beam is
aligned to the object and the
object is within the set sensing
range No voltage or voltage below
the limit values Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions)
Voltage interruptions Ensure there is a stable power
supply without interruptions
Sensor is faulty If the power supply is OK,
replace the sensor
Green LED flashes IO-Link communication -
Switching outputs not accord‐
ing to graphic C IO-Link communication -
Switching outputs not accord‐
ing to graphic C Parameter settings made
manually, which deviate from
the standard Initiate a factory reset. The
switching outputs are reset to
factory settings.
Yellow LED flashes; if Health is
present then take note of the
corresponding output signal; if
Alarm is present then take note
of the corresponding output
signal Sensor is still ready for oper‐
ation, but the operating con‐
ditions are not ideal/addition‐
ally with health output: power
supply interrupted Check the operating condi‐
tions: Fully align the beam
of light (light spot) with the
object / Clean the optical sur‐
faces / Check sensing range
and adjust if necessary, see
figures in
chapter 7.2 / With
health output: Check the volt‐
age supply, check all electrical
connections (cables and plug
connections).
Yellow LED lights up, no object
in the path of the beam Excessive background remis‐
sion Check changes to the back‐
ground. Reduce the sensitivity
of the sensor or use sensors
with background suppression
Object is in the path of the
beam, yellow LED does not
light up Sensitivity is set too low or dis‐
tance between the sensor and
the object is too long Increase the sensing range,
take note of the distance
between the sensor and the
background, see Figure
see
table 10, page 17
Object is in the path of the
beam, yellow LED does not
light up Remission capability of the
object is insufficient Increase the sensing range,
take note of the distance
between the sensor and the
background, see Figure
see
table 10, page 17
COMMISSIONING
7
8017851.1A15 / 2020-12-14 | SICK
Subject to change without notice
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