Table 15: NIE LED Designations, Normal Status and Descriptions
Descriptions/Other Conditions
Normal Status
LED Designation
Blinking - 5 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission
On Steady = Communication lost, waiting to join communication ring
Blinking
SA BUS (Green)
Flicker = Normal communications; the FC Bus or L
ON
W
ORKS
network
is transmitting and receiving data. Flickers are generally in sync with
data transmission but should not be used to indicate specific
transmission times. Off Steady = No field controllers are defined to
FC Bus or L
ON
W
ORKS
network in the NIE.
Flicker
FC BUS or LON
(Green)
On Steady = Battery defective. Flicker = Data Protection Battery is
not installed. Connect or install battery.
Off Steady
BATT FAULT (Red)
Flicker = Data is transferring on the Ethernet connection. Ethernet
traffic is general traffic (may not be traffic to or from the NIE).
Off Steady = No Ethernet traffic, probably indicates a dead Ethernet
network or bad Ethernet connection.
Flicker
ETHERNET (Green)
On Steady = Ethernet connection is established at 10 Mbps.
On Steady(10 Mbps
network)
10 LINK (Green)
On Steady = Ethernet connection is established at 100 Mbps.
On Steady(100 Mbps
network)
100 LINK (Green)
On Steady = NIE software is running.
On 1 second, Off 1 second = NIE software is in startup mode.
On 0.5 seconds, Off 0.5 seconds = NIE software is shutting down.
Off Steady = Operating system is shutting down or software is not
running.
On Steady
RUN (Green)
Flicker = Data traffic between NIEs. For an NIE that is not a Site
Director, this LED indicates regular heartbeat communications with
the Site Director. For a single NIE on a network without an Application
and Data Server (ADS), there is no flicker.
Varies (See next column.)
PEER COM (Green)
1
LED labeled FC BUS on models that support MS/TP Bus or N2 Bus and LON on models that support L
ON
W
ORKS
network.
28
NIE29 Installation Instructions
