Baumer BA DenexEdgeDetectorII - Manual (Page 13)

User Manual DENEX Edge Detector II 13/20 Baumer Electric AG
Version 2013-02, V1.6 www.baumer.com Frauenfeld, Switzerland
9 TROUBLESHOOTING
The green LED (POWER) is OFF
•
The sensor is not connected to +24V on pin 1 and 0V on pin 6 on the Tuchel
connector.
•
If the sensor previously has been working, there could be transients damaging the
sensor. Make sure that the voltage is 24VDC and is well 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? If
so, the laser settings have changed and the sensor must be sent back for repair.
The orange LED (OUTPUT-signal) is lit for every copy, but no pulse, or a different number of
pulses, is received by the connected equipment
•
The interfacing is bad. Check the connection of the sensor. Is the sensor supposed to
source or sink the signal? Should the pulse be positive or negative? See chapter 3.3.
•
Is the totalizer 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.
There is an over count (too few copies in the bundles)
•
Check the mechanical installation. The sensor must be parallel to the stream.
•
Back-edges could be counted. Check by running one paper at a time, and see if
there is an extra pulse sent at the end of the paper.
•
If the surface of the product is wavy, try tilting the sensor 5 - 10
°
according to figure
below.
•
If there is a stitch or something near the edge, try a longer blocking or output pulse,
see chapter 4, ”DIP-SWITCH SETTINGS”