NAVIS NavDP 4000 Series, Руководство по эксплуатации

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NAVIS NavDP 4000. Operation Manual
Run Select Ready Fault
Green Green Red Red
If READY signal comes before the waiting period expires, the round indicators will look as
Run Select Ready Fault
Green Green Green
and the thruster control softkey turns dark green. You can then press this softkey once again (and press ENTER softkey
to acknowledge) to include the thruster in the Auto Thruster Group.
6.2.4.4 Failure Mode — READY Signal Lost
a) READY signal fails during normal operation
In normal operation, the thruster’s state is indicated as
Run Select Ready Fault
Green Green Green
If READY signal is lost,
NAVIS NavDP 4000
waits for a short period while indicating the thruster’s state as
Run Select Ready Fault
Green Green Red
If there is no READY signal during the waiting period, the thruster’s state becomes as below
Run Select Ready Fault
Green White White Red
b) READY signal fails while recovering the thruster from a failure mode
If the thruster has just recovered RUN signal, its state is indicated as
Run Select Ready Fault
Green White White Red
The thruster softkey is red. To put the thruster into operation press the thruster softkey and then press ENTER softkey.
The new thruster’s state is
Run Select Ready Fault
Green Green Red Red
If the waiting period of time expires but there still is no READY signal, the thruster’s state changes to the previous
one, i.e.
Run Select Ready Fault
Green White White Red
6.3 Thruster Allocation Function
The Thruster Allocation Function (Thrust Allocation Logic, TAL) has the demand for F and M as the input value,
and then calculates the thrust demand to each thruster included in the Auto Thruster Group. This allows you to perform
the same maneuver with different thruster configurations, provided that the maximum possible thrust covers all the needs.
Indeed, if one of the thrusters from the Auto Thruster Group has been lost during DP operation or removed from the
Auto Thruster Group, its thrust will be distributed among the remaining thrusters, so that the demand for
F and M will be
satisfied.
The Thruster Allocation Function is a sophisticated optimization algorithm, it also takes into account all the power
limits to generators and thrusters which you have set in the Thruster and Power Pages. This function also takes into
account the positions of the circuit breakers and the tie breakers.
The Thruster Allocation Function is tuned to provide the best performance for specific vessel arrangement at any
environment.
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Doc. 000.JDP-10000-OME, rev.3.3.13/“2102.$–17A-Advanced”