Rockwell Automation 2755 AdaptaScan Bar Code Readers - Manual (Page 68)

Troubleshooting and Maintenance 6–3
Use the 7 LED indicators to isolate operating problems.
Figure 6.1
LED Indicators
On Symbol
Condition Indication
Yellow Bar code symbol is being scanned and decoded.
Flashing Bar code symbol is being read at less than 100% rate.
Off Not reading bar code symbol.
Trigger/Read
Condition Indication
Yellow Decoder trigger is active.
Green Valid bar code symbol read.
Off No trigger or valid bar code symbol read.
I/O 1 and I/O 2
Condition Indication
Yellow Corresponding input or output is in an On (closed contact) state.
Off Corresponding input or output is in Off (open contact) state.
LED Indicators