Baumer BA DenexGripperLED - Manual (Page 19)

User Manual DENEX Gripper LED 19/24 Baumer Electric AG
Version 2013-02, V1.4 www.baumer.com Frauenfeld, Switzerland
13 TROUBLESHOOTING
The green LED (POWER) is not lit
•
The sensor does not receive +24VDC 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
well regulated.
The red LED (LED-OFF) is lit constantly, and sensor is dead
•
Repower the sensor. Check that the green POWER-LED is lit. Is the LED-OFF turned
on after awhile? If so, the LED level has changed and the sensor must be sent for
repair.
The orange LED (OUTPUT) is never lit, or is lit once and then no more
•
Are the DIP-switches set the way they should? Is the input signal connected? 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. Power up the
sensor and try again.
The orange LED (OUTPUT) is lit for every copy, but no output pulse, or a different number of
pulses, is received to the connected 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.
•
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.
First copy is not counted
•
Check the position of the target. It should be 120 to 150 mm below the sensor. It
should be white or at least grey. Check that the target is parallel to the sensor.
•
Use the Target Status-LED to verify the target position.
The sensor does not read the Speed Sensor Input Signal
•
Check polarity and levels according to chapter 5.2.2, ”Speed Sensor Input”. Is the
speed very high? It should be max. 2.5 kHz.