NORTHROP GRUMMAN NAVITWIN IV, Руководство по эксплуатации, установке и обслуживанию

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NAVITWIN IV 056360/E
Alarm messages 4-7
4.5 Alarm messages
Internal Alarms (from NAVITWIN IV)
Internal alarms are all alarm conditions which the NAVITWIN IV recog-
nizes itself. Next to the “Off heading failure” (OFF HGD ALARM) and
“Heading difference failure” (HGF DIFF. ALARM) monitoring alarms,
these are the loss of data on the serial input lines and faulty return volt-
ages from the fluxgate sensor (TMC).
If the system is configured to read back the selection status from the
Switch-Over Unit, an alarm is also given when the heading source selec-
tion at the NAVITWIN IV differs from the status of the Switch-Over Unit.
Table 4-1:
Internal alarm
messages
Error
-ID Displayed Mes-
sage Cause Corrective Action
000 TIMEOUT
GYRO1 No valid gyro data
are received from
the true heading
source.
(dashes shown in
heading display of
respective source) If the source is active,
activate another
source immediately.
Check the function of
the respective head-
ing source and inter-
face.
No corrective action is
needed if a FOG sen-
sor is in re-alignment.
001 TIMEOUT
GYRO2
002 TIMEOUT
GYRO3
003 TIMEOUT
MAGN
(timeout mag-
netic) No valid data are
received from the
magnetic compass
heading source
(serial interface). If the source is active,
activate another
source immediately.
Check the function of
the magnetic com-
pass heading source
and interface.
007 TIMEOUT
RATE OF TURN No rate of turn data
are received from
the active source
(NAVIGAT gyrocom-
pass). Check whether active
source provides valid
rate of turn data.
008 TIMEOUT
SPEED ERR
CORR
(timeout speed
error correction No North speed
error correction data
are received from
the active source
(NAVIGAT gyrocom-
pass). Check whether active
source properly com-
putes error correction.
009 TIMEOUT
MAG VARIA-
TION
(timeout mag-
netic variation) No valid magnetic
variation data are
received from the
active source (NAVI-
GAT gyrocompass)
or GPS. Check whether the
active source or GPS
provides valid mag-
netic variation data.
Check interface and
settings.