Wenglor OPT2130, Operating Instructions Manual

Page: 13 / 17

13 Through-Beam Sensors
5.3 Diagnostics
Causes for Triggering the Contamination Warning (blinking LED):
Display LED Diagnosis/Cause Elimination
Continuous blinking
at approx. 2.5 Hz
Contamination Carefully clean the optic cover with a cloth.
Aged emitter diode Replace the sensor.
Unreliable working range
• Increase the sensor’s switching distance.
• Reduce distance between sensor and reciever.
Continuous blinking
at approx. 5 Hz
Short-circuit Check electrical wiring and eliminate the short-circuit.
Over-temperature
Disconnect the sensor from supply power
and allow it to cool down.
Hardware error Replace the sensor.
Contamination Warning Flowcharts
beginning contamination
not detected not detected detected
not detected not detected
not detected not detected not detected
detected
Through Beam Sensor
no contamination
Object
Switching Status Indicator
Object
Switching Status Indicator
Object
Switching Status Indicator
advanced contamination
on on off
on blinking
off off
off
off
Receiver Receiver Receiver
Receiver Receiver Receiver
Receiver Receiver Receiver
Emitter
Emitter Emitter
Object
Object Object
Emitter Emitter Emitter
Object Object Object
Emitter Emitter Emitter
Object Object Object