SICK HTB18 Manual De Instrucciones página 48

OPERATING INSTRUCTION
1.8.4 Additional functions
1.9 Troubleshooting
48 O P E R A T I N G I N S T R U C T I O N | HTB18(L)
Alarm / Health output
The sensor (HTB18(L)) features a pre-failure notification output ("Q2" in connection
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 is conta‐
minated, sensor is out of alignment. In the good state: LOW (U
contaminated: HIGH (>+U
Health output: The sensor (HTB18(L)) 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
Time types: HTB18(L) 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.
The Troubleshooting table indicates measures to be taken if the sensor stops working.
Table 20: Troubleshooting
LED/fault pattern
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
Green LED flashes
Digital outputs not according to
graphic
Digital outputs not according to
graphic
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
Yellow LED lights up, no object
in the path of the beam
- 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
Cause
No voltage or voltage below
the limit values
Voltage interruptions
Sensor is faulty
IO-Link communication
IO-Link communication
Parameter settings made
manually, which deviate from
the standard
Sensor is still ready for oper‐
ation, but the operating con‐
ditions are not ideal/addition‐
ally with health output: power
supply interrupted
The sensing range distance is
too large
< V); if excessively
V
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
-
-
Initiate a factory reset. The
digital outputs are reset to
factory settings.
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 section 1.8.2 / With
health output: Check the volt‐
age supply, check all electrical
connections (cables and plug
connections).
Reduce the sensing range,
see figures in section 1.8.2.
8017850.1HW2/2022-11-14 | SICK
Subject to change without notice