Additional Functions - SICK WLA26 Instrucciones De Operación

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Additional functions

8020357.14CS | SICK
Subject to change without notice
Alarm
Alarm output: The sensor (WLA26) features a pre-failure notification output ("Alarm" in
connection diagram [see table
for operation to a limited extent. The LED indicator flashes in this case. Possible
causes: Sensor or reflector is contaminated, sensor is out of alignment. In the good
state: LOW (0), if excessively contaminated HIGH (1).
Health
Health output: The sensor (WLA26) features a pre-failure notification output ("Health"
in connection diagram [see table
ready for operation to a limited extent or the cable has been interrupted. Possible
causes: Sensor or reflector is contaminated, sensor is out of alignment, cable is dam‐
aged. In the good state: HIGH (1), if excessively contaminated or in the event of cable
interruption LOW (0). The yellow LED indicator flashes in this case.
Table 5: Alarm / Health
Test input
Test input: The WLA26 sensors feature a test input ("TI" or "Test" on the connection
diagram [see table 2, table 3
and, therefore, check that the sensor is functioning correctly: If female cable connec‐
tors with LED indicators are used, you have to ensure that the TI is assigned accord‐
ingly.
It is important that there is no object between the sensor and reflector; activate the test
input (see the connection diagram
shut down or the detection of an object is simulated. Refer to
tion. If the switching output fails to behave in accordance with
cation conditions. See section Fault diagnosis.
Table 6: Test
ADDITIONAL FUNCTIONS
5]), which issues a notification if the sensor is only ready
5]), which issues a notification if the sensor is only
Alarm (≤ 100 mA)
+ (L+)
Alarm
‒ (M)
+ (L+)
Alarm
‒ (M)
and table 6]), which can be used to switch the sender off
[see table 2, table 3
Test → M
+ (L+)
Test
– (M)
Health (≤100 mA)
+ (L+)
Health
‒ (M)
+ (L+)
Health
‒ (M)
and table 6]). The send LED is
table 6 to check the func‐
table 6, check the appli‐
Test → L+
+ (L+)
Test
– (M)
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