Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 285)

17–3 Maintenance and Troubleshooting
Publication 2755-833
This section lists problems that may occur with the decoder and/or
connected equipment. Each problem lists possible causes and
solutions.
Problem: Decoder ”Power On” indicator does not light.
Cause: Decoder power switch is in OFF position.
Solution: Turn decoder power switch to ON position.
Cause: No incoming power.
Solution: Verify power source.
Cause: Improper connection to power source.
Solution: Check connections.
Cause: Faulty decoder.
Solution: Return decoder to Allen-Bradley for repair.
Problem: Decoder ”Power On” indicator lights but ”CPU
Active” indicator does not stay lit.
Cause: Internal decoder failure.
Solution: Return decoder to Allen-Bradley for repair.
Problem: Decoder ”Laser On” indicator lights but scanner
”Laser On” indicator does not light.
Cause: Cable connections between decoder and scanner are
loose or defective.
Solution: Check cable and connections.
Problem: Decoder ”Laser On” indicator does not light.
Cause: Wrong configuration.
Solution: Configure the Laser-On Mode parameter of the
decoder to ON.
Cause: Trigger not active. (Laser-on Mode parameter of decoder
is set to Triggered).
Solution: Activate trigger and look at the Trigger Active
indicator on decoder. When the trigger is activated, the indicator
should light.
Troubleshooting