NAVIS NavDP 4000. Operation Manual
Ready
Signal from a thruster to
NAVIS NavDP 4000
in response to SELECT, and means that from this time the thruster
is controlled by
NAVIS NavDP 4000
.
Feedback
Feedback signal from a thruster, in terms of voltage or current, which allow the
NAVIS NavDP 4000
system
to estimate actual thrust produced by the thruster.
For example – rpm feedback, pitch feedback for CPP, angle feedback for azimuth thruster or rudder.
Linear, sin/cos or 3-phase angle feedback signal can be realized for azimuth thrusters.
Command
Analog command signal from
NAVIS NavDP 4000
to a thruster, in terms of voltage or current, which is
proportional to the desired thrust (“Thrust command”) or rpm (“rpm command”) or pitch (“Pitch command”) for
CPP or angle (“Angle command”) for rudders and aziumth thrusters.
Command signal may be tansefered as proportional analog signal or discrete signal from
NAVIS NavDP 4000
to a
thruster, for example steering gear NFU commands (see below).
Linear, sin/cos, 3-phase angle command signal, bang/bang or proportional rate control signal can be provided for
azimuth thrusters.
Combined control can be realized for CPP propellers/thrusters: two separate commands — rpm and pitch.
Direction discrete command
Discrete signals — clutch ahead/astern command signals for propellers, port/starboard
command signals for tunnel thrusters.
Direction discrete feedback
Discrete signals — clutch ahead/astern feedback signals for propellers, port/starboard feed-
back signals for tunnel thrusters.
Thruster CB Status
— Discrete feedback signal from a thruster (open/close), for PMS function
Thruster Power
— Analog (voltage or current) feedback signal from a thruster, for PMS function
NOTE!
The system configuration can include additional conditions to generate
the “available for DP” signal
6.2.4.2
Normal Operation
If the Mode Selector is set to MANUAL position, the thruster’s state is indicated as
Run
Select
Ready
Fault
Green
White
White
The thruster control softkey is grey (deactivated). After the Mode Selector is set in IJ or DP position,
NAVIS NavDP
4000
checks for each thruster whether the corresponding RUN signal is present. If yes,
NAVIS NavDP 4000
sends
SELECT signal to each thruster and because in normal operation RUN signal is present for each thruster and starts
waiting for READY signal in response. The Sel indicator turns green. After receiving READY signal, the Rdy indicator
turns green too. Therefore, the thruster’s state becomes as below
Run
Select
Ready
Fault
Green
Green
Green
The thruster control softkey turns dark green, which means that the thruster is not included into the Auto Thruster
Group, and can only be controlled manually by means of
and
softkeys. Furthermore, the thruster can be included
in the Auto Thruster Group.
If the Mode Selector is set to MANUAL position,
NAVIS NavDP 4000
releases SELECT signal, and the thruster’s
state becomes
Run
Select
Ready
Fault
Green
White
White
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Doc. 000.JDP-10000-OME, rev.3.3.13/“2102.$–17A-Advanced”
