User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 140 / 04 (2011-11)
Operating Instructions
V-2 Alarm Management
V Alarms.fm / 10.11.11
V-12
2.2.1 Navigation Sensor Alarms
This chapter describes the navigation sensor alarms available in the system. The main navigation sensors
used for the heading, speed and position instruments are monitored depending on the “sensor selection
mode”. Those sensors which are available twice or more in the installation can be supported by an auto-
matic selection mode.
- If the selection mode is AUTO the switching over to another sensor of the same type is done
without any alarm or warning.
In AUTO mode the switch over to a manual sensor (Manual Speed or Manual Position) is only
accompanied by an alarm if the manual data have not been set before.
- If the Manual selection is chosen the switching over to the backup sensor must be done manually
after the respective alarm or warning has been given.
In the meantime (until a new sensor has been selected) the system is using the last valid values of
the disturbed or faulty sensor which produced the alarm.
It is required to perform the switch over to the new sensor a soon as possible, but not before its
data have been checked for plausibility and correctness.
Note:
- Depending on the status of the navigation sensors it may be possible that selected display or oper-
ation modes of the system are no longer available or may not be allowed by the approval authori-
ties.
- Details are given below as required in the explanations to the different sensor alarms.
The automatic selection mode is the default setting after start or restart of the
system.
In any case (in manual or automatic selection mode) the set data for the sensors
running in manual mode must be checked regularly and a real sensor must be
selected as soon as possible.