Kongsberg cJoy OT, Руководство оператора

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Message explanations
385585/C A-43
Possible
consequences:
The system uses the Vessel Model to estimate the vessel's position and velocities.
If the external conditions change, the vessel may drift off position after a few
minutes. When the "Position Dropout" message is reported, the setpoint is set
automatically to the current estimated vessel position. If only one of the PSes
(Process Stations) in a dual redundant system reports the position dropout, an
automatic change of master will occur.
Corrective
actions:
If the vessel drifts off position, select Joystick mode and control the vessel
manually.
Check for faults in the enabled position reference systems and the interfaces
between the DP system and the enabled position reference systems.
Position out of limits
Description: This message is reported if the deviation between the wanted position and the
present position exceeds the operator-specified limit.
The reason for the fault may be insufficient thrust to maintain vessel position
against wind/wave forces.
Additional
information:
•
Position deviation.
•
Violated limit value.
Possible
consequences:
Depends on the vessel's operation mode.
Corrective
actions:
Select a heading which is more favourable in the prevailing environmental
conditions.
Check for wrong measurements from the enabled position reference systems.
Enable more thrusters and/or main propellers for DP control.
If the DP system is in Auto Position mode, use system-selected heading to reduce
the power consumption.
Position presentation invalid
Description: This message is reported if the difference between the present position used by
the DP system and the operator specified Local N/E Origin exceeds a limit that
causes the accuracy of the displayed coordinates to be degraded.
The reason for the fault may be that when using Local N/E position presentation
the operator specified offset is too large compared to position of the Reference
Origin.
The method of detection is comparison of the present position with the operator
specified Local N/E position.
Additional
information:
Limit
Possible
consequences:
Inaccurate position data shown on the display.
Corrective
actions:
Change the operator specified local N/E position.
Select another display presentation (other than Local N/E).