LED Indicators
Original instructions
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Display
The LEDs are on the front of the 140CRA31908 module:
Indications
LED conditions:
Description
Run
IO
Mod Status
Net Status
green
red
green
red
green
red
power-up sequence
blink (.25 sec on; .25 sec off)
1
2
green/red/green
green/red/off
not configured
IP address not valid
—
—
flashing
off
off
off
  • valid IP address
  • invalid configuration
off
off
flashing
off
flashing
off
configured
no external error detected
flashing
off
—
—
flashing
off
external error detected
flashing
on
—
—
flashing
off
I/O data communication established
stop
flashing
on/off(1)
on
off
on
off
run
on
on/off(2)
on
off
on
off
detected error states
recoverable error
—
—
off
flashing
—
—
nonrecoverable error
flashing
on
off
on
—
—
duplicate IP address
—
—
—
—
off
on
OS firmware update
flashing
off
off
on
off
on
(1) stop (IO LED):
  • on: An input or output indicates a detected error that originates in a module or a channel configuration.
  • off: Operations are normal.
(2) run (IO LED):
  • on: An external error is detected.
  • off: No external errors are detected.
Identification of the I/O master of the S908 bus:
NOTE: In a redundant configuration, IO led is flickering on both 140CRA31908 modules when all S908 drops are off.
Ethernet Port Indications
These LEDs report the status of the Ethernet port:
Name
Color
Status
Description
LINK
green
on
100 Mbps link detected
yellow
on
10 Mbps link detected
—
off
no detected link
ACT
green
blinking
active Ethernet link (transmit or receive)
—
off
inactive Ethernet link