Baumer BA DenexMicro - Manual (Page 19)

User Manual DENEX MICRO 19/24 Baumer Electric AG
Version 2013-02, V1.6 www.baumer.com Frauenfeld, Switzerland
14 TROUBLESHOOTING
The green LED (POWER) is not lit
•
The sensor does not receive +24V on pin 1 and 0V on pin 6 on the Tuchel connector,
see chapter 5, ”Electrical Installation”.
•
If the sensor has been working and is suddenly dead, there could be transients
knocking out the sensor. Make sure that the voltage is between 20V and 30V and is
regulated.
The red LED (LASER-OFF) is lit constantly, and no laser is present
•
Re-power the sensor. Check that the laser is lit. Is the laser turned off after a while,
the laser level has changed and the sensor must be sent for repair.
The orange LED (OUTPUT-signal) is never lit, or is lit once and then no more
•
Is the input signal connected? Are the DIP-switches set the way they should? As
soon as one pulse is received, the sensor believes that input pulses are used, and it starts
to wait for more. Disconnect the input signal wires if not used. Re-power the sensor and try
again.
The orange LED (OUTPUT-signal) is lit for every copy, but no pulse, or a different number of
pulses, is received to the following equipment
•
The interfacing is bad. Check again that the sensor is connected the way it should,
see chapter 5 ”Electrical Installation”.
•
Is the sensor supposed to source or sink the signal? Should the pulse be positive or
negative? See chapter 5.2
•
Is the totalizer (pulse counter) used, a battery powered device? It can be a problem
because of the voltage drop over the output transistor in the sensor. There is approx. 0.8V
voltage drop over emitter and collector at 2 mA which could mean that the totalizer does
not see any changes in state, i.e. from ”high” to ”low”. Check with a scope between pulse
and ground.
•
The opto-coupler in the sensor can be faulty. See the specs of the opto-coupler.
First copy edge is not counted or back-edges are counted (does not apply for a mounting
with reference)
•
Check that the laser does not hit anything within 300 mm below the sensor when no
products are present.
•
If the laser hits a plate within 300 mm below the sensor, check the possibility of
making a hole in the plate. Drill a hole with a diameter of 5 mm, which the laser can pass
through. The laser must still be stopped by a black plate, because of safety regulations!
•
If back-edges are counted, check the distance from the up-bent back-edge to the end
of the paper.