data protection battery continues to power the network
engine for approximately 1 to 3 minutes so that volatile
data can be backed up in nonvolatile memory. The POWER
LED goes Off when the data backup is completed.
If the 24 VDC supply power to the encryption module in
the network engine is disconnected or lost, encrypted
communication between the network engine and the
building network is lost. The unit remains offline to other
devices on the network until power to the encryption
module is restored.
Troubleshooting
RS232C-B Port
The RS232C-B port on the NAE-S is used for hardware
diagnostics at the factory and in the field. This function
is only available for an NAE-S with Release 9.0 or earlier.
The RS232C-B port is only accessible once the plastic cover
has been removed from the network engine. It is not used
during normal operation. Any input on this port is ignored
during normal device operation. The port is only available
for input for 3 seconds after a reboot when a # prompt
appears. A technician has 3 seconds to enter a specific
key sequence to start factory diagnostics with which the
technician can perform a limited set of commands.
Following a reboot, the NAE-S with Release 9.0 or earlier
uses the RS232C-B port to output diagnostic information.
This information can be used for troubleshooting. For
details about the output of the NAE-S startup datastream
refer to the
Troubleshooting Procedures
section of the
NAE
Commissioning Guide (LIT-1201519)
.
LED Status Indicators
The NAE-S has LEDs to indicate power and communication
status. See Figure 10 and Table 5.
LED Test Sequence at Startup
During startup, the NAE-S automatically initiates an
LED test to verify the operational 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. The
FC A
and
FC
B
LEDs also turn on.
3.
The
PEER COM
,
RUN
,
FC A
,
FC B
, and
GENL FAULT
LEDs shut off. The
RUN
LED flashes to indicate that
the network engine software is loading.
4.
When the
RUN
LED goes On Steady, the operating
system and
Metasys
application are running and the
network engine is ready. Thereafter, the LEDs display
the operational status of the network engine.
The total time to start up the network engine depends on
the size of the database and can take several minutes.
Figure 10: NAE-S with LED Designations
System Re-Boot Switch
The System Re-Boot switch (Figure 2) forces a manual
restart of the NAE-S 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.
Table 5: NAE-S 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 NAE-S).
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.
NAE-S Installation Guide
7
