status of the LEDs. Immediately after connecting supply
power, the following LED lighting sequence occurs:
1. The network engine emits one short beep,
indicating that the BIOS startup was successful.
2. The PEER COM, RUN, and GENL FAULT LEDs
turn on, indicating that the OS is booting up. For
network engine models, the FC A and FC B LEDs
also turn on.
3. The PEER COM, RUN, GENL FAULT LEDs, and the
FC A and FC B LEDs shut off. The RUN LED flashes
to indicate that the network engine software is
loading.
4. The LEDs display the operational status of the
network engine. When the RUN LED goes On
Steady, the operating system and Metasys
application are running and the network engine is
ready.
Result The total time to start up the network engine
depends on the size of the database and can take several
minutes.
Figure 18: Network Engine with LED designations
System re-boot switch
The System Re-Boot switch (Figure 3) forces a manual
restart of the network engine processor. All data changes
made to the system since the last time the network
engine saved data are lost on restart, including alarm,
trend, and audit trail data.
Note: Press the System Re-Boot switch only if
the network engine fails to respond and cannot
be accessed by any user device. Do not press the
System Re-Boot switch unless you have tried other
reasonable means to fix the problem.
Network Engine LEDs designation, normal status, description, and other conditions
Table 10: Network Engine LEDs designation, normal status, description, and other conditions
LED Normal Descriptions/Other Conditions
POWER (Green) On Steady
On Steady = Unit is getting power from either the battery or 24 VAC power.
Also see the 24 VAC LED. Off Steady = Unit is shut down.
ETHERNET (Green) Flicker
Flicker = Data is transferring on the Ethernet connection. Ethernet traffic is
general traffic (may not be for the network engine).
Off Steady = No Ethernet traffic, probably indicates a dead Ethernet network
or bad Ethernet connection.
10/LINK (Green) On Steady On Steady = Ethernet connection is established at 10 Mbps.
100/1000 LINK (Green/
Yellow)
On Steady
On Steady (Green) = Ethernet connection is established at 100 Mbps.
On Steady (Yellow) = Ethernet connection is established at 1,000 Mbps.
FC A (Green) Flicker
On Steady = Controllers are defined to FC A (FC Bus 1 or N2 Trunk 1) in the
network engine, but none are communicating (network engine transmitting
only).
Flicker = Normal communications; FC A port is transmitting and receiving
data. Flickers are generally in sync with data transmission but should not be
used to indicate specific transmission times. Also, the flicker rate for the MS/
TP bus is different from the rate for the N2 Bus.
Off Steady = No field controllers are defined to FC A (FC Bus 1 or N2 Trunk 1)
in the network engine.
NAE55 Installation Guide 13
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