Status Leds - Allen-Bradley 1747-SN User Manual

3–8 Installation and Wiring

Status LEDs

Publication 1747 6.6 - July 1996
The scanner has two LEDs that indicate its operating status, FAULT
and COMM. The FAULT LED indicates the scanner's overall status.
The COMM LED indicates the RIO link communication status.
The FAULT LED is off whenever the scanner is configured and
operating properly. The COMM LED state is valid only when the
FAULT LED is off.
The table below provides the scanner and communication status as
indicated by the FAULT and COMM LEDs.
FAULT LED COMM LED
Flashing Red Not applicable
Red Not applicable
Off Red
Off Off
Off Green
Off Flashing Green
Off Flashing Red
Status Information
Scanner configuration error
No RIO link communication attempted
Duplicate scanner detected on RIO link
Major fault on scanner
No RIO link communication attempted
Hardware fault detected
Scanner is operating properly.
Scanner is offline (no RIO link communication
attempted).
Scanner is operating properly.
Scanner is online (active communication
established with all devices).
Scanner is operating properly.
At least one configured RIO link device is not
communicating.
Scanner is operating properly.
None of the configured RIO link devices are
communicating.