SICK W26, Operating Instructions Manual

Page: 26 / 168

Health output: The sensor (WTB26) features a pre-failure notification output (“Health”
in the connection diagram [
see table 3 ]), which issues a notification if the sensor is
only ready for operation to a limited extent or the cable has been interrupted. Possible
causes: Sensor is contaminated, sensor is out of alignment, cable is damaged. 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.
Test input
Test input: The sensors WTB26 feature a test input (“TI” or “Test” on the connection
diagram [
see table 2 ]), which can be used to switch the sender off and, therefore,
check that the sensor is functioning correctly: If female cable connectors with LED
indicators are used, you have to ensure that the TI is assigned accordingly.
If an object is detected, activate the test input (see the connection diagram [ see
table 2 ]).
The send LED is shut down or no object being detected is simulated. Refer to table 5
to check the function. If the switching output fails to behave in accordance with the
graphic, check the application conditions,
see „Troubleshooting“, page 32 .
Table 11: Test
Test → M Test → L+
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
+ (L+)
Test
– (M)
7 Commissioning
7.1 Alignment
WTB26P: Align the sensor with the object. Select the position so that the red emitted
light beam hits the center of the object. You must ensure that the optical opening (front
screen) of the sensor is completely clear [see
table ].
Align the sensor with the object. Select the position so that the infrared light (not
visible) hits the center of the object. The correct alignment can only be detected via the
LEDs. See
table and table 4 . You must ensure that the optical opening (front screen) of
the sensor is completely clear.
6
ADDITIONAL FUNCTIONS
26 O P E R A T I N G I N S T R U C T I O N S | WTB26 8020354.1DS8/2021-11-24 | SICK
Subject to change without notice
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