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Status leds, Status leds -9 – Rockwell Automation 1747-SN Remote I/O Scanner User Manual

Page 43

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Publication 1747-UM013B-EN-P - January 2005

Installation and Wiring 3-9

Status LEDs

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.

IMPORTANT

If you are using Block Transfer (BT)
functionality, BTs may not function on adapters
in Hold Last State settings. Refer to each device’s
user manual for information on BTs and Hold
Last State settings.

FAULT LED

COMM LED

Status Information

Flashing Red

Not Applicable

Scanner configuration error

No RIO link communication attempted

Duplicate scanner detected on RIO link

Red

Not Applicable

Major fault on scanner

No RIO link communication attempted

Off

Red

Hardware fault detected

Off

Off

Scanner is operating properly

Scanner is offline (no RIO link communication
attempted)

Off

Green

Scanner is operating properly

Scanner is online (active communication established
with all devices)

Off

Flashing Green

Scanner is operation properly

At least one configured RIO link device is not
communicating

Off

Flashing Red

Scanner is operating properly

None of the configured RIO link devices are
communicating