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NT888G MK2 AUTOPILOT OPERATING MANUAL

3.3 Operational

Display Messages … (Continued).

(xxi)

REM N.F.U

– Navitron/proprietary NFU active.

(xxii)

REM DODGE

– Navitron/proprietary DODGE active.

Changes to the operational display occur automatically when Track Steering Mode is
selected and when new Autopilot courses are ordered via the rotary Set Course
Control or the Turn Mode keys.

New Autopilot course display details are shown in Section 2.36.

Track Mode display details are shown in Section 2.38 (i).

3.4 Alert Display Messages.

The alert messages listed in Table 3.4.1 will be displayed (if appropriate) in the alarm
box at bottom of the display and will be accompanied by the appropriate alert
management icon listed in Table 3.4.2.

Warnings and alarms are accompanied by an audible signal unless the audible alarm
has been muted. (Section 2.8 refers).

The alert messages are also transmitted to Bridge Alert Management (BAM) system if
applicable.

Alerts are acknowledged by pressing the

TEST / OFF

key or via the BAM system.

NOTE: The Off-heading alert is defined by DNV/GL as a category A alert and
therefore it is not possible to acknowledge this alert remotely from the BAM system.

Alert Text

Message Text

Alert Type

No alert

None

Lost HDG control

HCS Failed. Switch to Manual steering

Alarm

Doubtful heading

Deviation between heading sources exceeded limit Warning / Alarm

Doubtful heading

Heading monitor function is impossible

Warning / Alarm

HCS power fail

HCS working normally on Backup Power only

Caution

HCS power fail

HCS working normally on Main Power only

Caution

Off-heading

Yawing is too big: take helm to keep steady

Alarm

Off-heading

Yawing is too big: take helm to keep steady

Warning

HCS unavailable

Internal Distribution Box Failure

Caution

HCS unavailable

Internal Distribution Box +7V Error

Caution

HCS unavailable

Internal Distribution Box +3.5V Error

Caution

HCS unavailable

Internal Distribution Box +2.5V Error

Caution

HCS unavailable

No HDG source available, Step HDG failed

Caution

HCS unavailable

No HDG source available, Step HDG not aligned

Caution

HCS unavailable

No HDG source available

Caution

HCS unavailable

No HDG source available, Mag Compass failed

Caution

HCS fault

Track steering failed. No input data

Warning / Alarm

HCS fault

HCS fault. Switch to manual steering

Warning / Alarm

HCS fault

HSC unavailable. Control unit fault.

Warning / Alarm

HCS fault

No Setup data

Caution

HCS fault

Control unit interface error

Caution

Table 3.4.1 Alert Display Messages.

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Содержание NT888G MK2

Страница 1: ...2 AUTOPILOT OPERATING MANUAL 17 The Tanneries Brockhampton Lane Havant Hants U K PO9 1JB Registered in England No 2607869 Tel 023 9249 8740 Fax 023 9249 8783 Int Code 44 23 Email sales navitron co uk...

Страница 2: ...l displacement vessels versus High Speed Craft are very different it is essential that the correct vessel type DISP or HSC is correctly entered in the Autopilot SET UP Menu during installation and cal...

Страница 3: ...r Limit Control 1 9 Programmable Automatic Rate of Turn Control 1 10 Programmable Automatic Radius of Turn 1 11 Adjusting Overshoot and Undershoot 1 12 Using the Track Function 1 13 Cancelling an Audi...

Страница 4: ...ry to the Controls Menu which is shown on the right of the main display Unless alternative settings have been established from experience during sea passages with the Autopilot in operation selection...

Страница 5: ...rate in the Adaptive Mode until calibrated per Section 2 29 and manually entered operational control settings will be required via access to the Controls Menu as follows i With the Autopilot in the ST...

Страница 6: ...ndersteer or Oversteer as follows vii Use the CONTROLS key to select RUDDER and increase or decrease the Rudder Control value 1 to 9 using the rotary illum key to optimise the straight line steering p...

Страница 7: ...n automatically adjusted feature of the full Adaptive operating mode will require manual adjustment in the non Adaptive PID mode To manually decrease the frequency of rudder movement due to yawing i U...

Страница 8: ...out confirmation within 30 seconds the new course demand will automatically cancel and the original set course will be maintained Pressing the CANCEL key will also cancel the course change NB The Auto...

Страница 9: ...hes the new set heading and the Rate of Turn decreases the MAX display indication will automatically extinguish NB During Track Steering Mode using the HTC sentence Section 2 9 2 38 it is possible for...

Страница 10: ...ding when altering course using the Autopilot If vessel overshoots increase COUNTER RUDDER value If vessel undershoots reduce COUNTER RUDDER value 1 12 Using the Track Function Section 2 9 2 38 The Au...

Страница 11: ...ew Heading to Waypoint and the Track graphic will show vessel icon left or right of heading with the error angle below If the Track Mode Heading to Waypoint is to be rejected use the CANCEL key If the...

Страница 12: ...1 14 Testing Alarms Section 2 8 The alarms may be tested by double press of the TEST OFF keypad if the alarm function is muted audible alarms will be automatically re enabled X 2 To test Alarms i Dou...

Страница 13: ...ons the turn to Next Course To use the NEXT COURSE function a Press the NEXT COURSE key confirmed by flashing corner LED illumination NB NEXT COURSE request cancelled if required by 2nd press of NEXT...

Страница 14: ...listing from ADAPT to TURN TYPE as shown and selection of the parameter required is via further CONTROL key operation When the required item is highlighted by the blue bar the value or state of that i...

Страница 15: ...Remote Stations permitted to work REMOTE Off corner LED off Remote Stations not permitted to work 1 19 The Illumination Control Section 2 5 In the normal Autopilot Operating Mode the rotary illuminat...

Страница 16: ...DODGE READY LED iii Move and hold the NT920NFU Jog Lever right STBD or Left PORT to apply corresponding rudder and override the Autopilot iv Release the Jog Lever to centre when ready for the Autopil...

Страница 17: ...ll only function when the Autopilot REMOTE key is set to enable Remote inputs REMOTE key corner LED on If the REMOTE key is off no corner LED the NT990 FU s will be disabled i Check that the Autopilot...

Страница 18: ...nd the Autopilot will maintain the vessel on the current heading 1 23 Using Proprietary Power Steer and Override functions i Standard Dodge Non Follow Up Follow Up Functions Non Navitron proprietary P...

Страница 19: ...Type ROT or RAD 2 5 The Rotary Illumination Control 2 6 The LIMITS Menu i Rudder Limit ii Off Heading Alarm iii Course Comparator Alarm iv Watch Alarm v Rate of Turn ROT Calibration Display sec or min...

Страница 20: ...d Data Input Speed through the Water 2 27 SOG Speed Data Input Speed over the Ground 2 28 Draft Input Laden State 2 29 Calibration of Steering Performance Override Controls vs Speed 2 30 Calibration o...

Страница 21: ...the Control Unit Display as STANDBY A flashing dot heartbeat is shown in the bottom right hand corner of the display to indicate that the system is functioning normally the display is being actively...

Страница 22: ...daptive Autopilot where the control parameters are automatically adjusted as a function of Speed and Draft input data which typically requires little or no manual adjustment beyond initial installatio...

Страница 23: ...ia the CONTROLS Menu If Non Adaptive operation is in use it will always be necessary to adjust the RUDDER value manually again via the CONTROLS Menu The Rudder Control defines the angle of Rudder that...

Страница 24: ...ng short term course errors arising from pitch and roll etc thus avoiding unnecessary Rudder movement As a general rule the Yaw control should be set to provide good sensitivity which would normally b...

Страница 25: ...ombined to degrade Autopilot course keeping when using Rudder s only In this case the Rudder Mode of control would be retained but would be assisted by the introduction of Bowthruster action via selec...

Страница 26: ...data via the xxHTC sentence Section 2 9 2 38 refers Rate ROT or Radius RAD control type is selected via the CONTROLS Menu as follows a Use the CONTROLS key to enter the Controls Menu b Use the CONTROL...

Страница 27: ...that the Autopilot is normally permitted to apply However the Limit set can be exceeded if the Autopilot system is obliged to demand a greater angle of rudder to check high rates of turn The required...

Страница 28: ...e whichever inputs are prioritised as No 1 and No 2 To switch the Course Comparator Alarm Mode ON OFF a Simultaneously press the CANCEL and CONFIRM keys for 5 seconds until the Set Up Menu is display...

Страница 29: ...et the Watch Alarm time interval OFF or 3 to 12 mins a Use the LIMITS key to enter the Limits Menu b Use the LIMITS key again to select WATCH box followed by flashing current value OFF or 3 to 12 c Us...

Страница 30: ...ed via the LIMITS Menu NB If ROT has not been selected in the CONTROLS Menu i e RAD Turn Type selected the ROT setting in the LIMITS Menu will not respond to cursor selection adjustment To set the ope...

Страница 31: ...n override the RAD value set in the Autopilot LIMITS Menu or even command ROT control operation in the Track Steering Mode Sections 2 4 and 2 9 refer To set the operational Radius of Turn RAD value a...

Страница 32: ...determined during Sea Trials and include the APH Time Constant and Autotrim Trip Angle the values of which are set altered via the Set Up Menu Installation and Tech Manual Section 3 13 to 3 15 The Set...

Страница 33: ...are muted they will be automatically re enabled 2 9 The TRACK Key Track Mode Steering operation is only possible when the Autopilot System is engaged ON and Track Steer data is available to the Autopi...

Страница 34: ...to No 2 or 3 the REMOTE key of No 1 should be activated LED on to allow entry by Nos 2 and 3 The nominated new Master No 2 or No 3 should then be switched ON after which the ON and REMOTE keys should...

Страница 35: ...confirmed by flashing corner LED and display change to show NEXT XXX b Rotate the COURSE SET control until the new course required is shown in the NEXT box on the display flashing NEXT XXX c The dire...

Страница 36: ...s ordered by the rotary SET COURSE Control are always displayed in the SET COURSE area of the display and will be shown as a flashing NEW COURSE value if CONFIRM key operation is required to turn to t...

Страница 37: ...ormal operational functions can be summarised as follows i NEW COURSE and NEXT COURSE modes Execute Confirm or abort Cancel ii COURSE AGAIN Resume Course function and Latched NFU See Operating Manual...

Страница 38: ...peration the Autopilot display will show following values Heading data source Rate of Turn See Note 1 Autopilot Course Set Set Radius New Course via Rate of Turn operator Track order Speed data Rudder...

Страница 39: ...ement DISP or High Speed Craft HSC Mode of operation set is always displayed on the autopilot Control Unit splash screen at power up If it is required to alter the vessel type set i With the Autopilot...

Страница 40: ...steer the vessel and check that the ACTUAL HEADING and SET COURSE values displayed follow ships head movement accurately and in unison The rudder angle indicator display should also function normally...

Страница 41: ...ion in practice i e increases sensitivity to Yaw PORT Yaw will result in STBD rudder application confirmed by illumination of the GREEN chevron situated immediately above the Set Course knob Conversel...

Страница 42: ...tting will need to be decreased NB Once the Adaptive calibration has been optimised versus Speed Draft input data the RUDDER parameter adjustment will be automatic in the Adaptive operating mode Secti...

Страница 43: ...e Autopilot is switched from STANDBY to ON and permits the Autopilot to copy the angle of offset rudder manually applied to steer the vessel dead ahead on the desired heading i e Trim compensated at t...

Страница 44: ...lly corrected over the timing period associated with the Autotrim APH integrator to correct the mean direction through the water i e the mean course actually steered will be the same as the course act...

Страница 45: ...ted by the time based automatic AUTOTRIM correction process However the Autopilot is equipped to automatically trip or cancel any existing TRIM APH rudder offset for any course change ordered in exces...

Страница 46: ...ry reduction of time constant can degrade overall steering performance If in doubt consult Navitron Systems Ltd To Alter the Autotrim Time Constant The Autotrim time constant is accessed via the Setup...

Страница 47: ...e opposite direction to gain an average evaluation Vessel Consistently Overshoots Increase the Counter Rudder Value Vessel Prematurely Arrested Decrease the Counter Rudder Value The optimum Counter se...

Страница 48: ...trim APH Integrator with a higher long term resolution than the Yaw control setting would otherwise permit As a general rule the Yaw control should be set at the lowest number that provides the requir...

Страница 49: ...on of the TEST OFF key NB If the alarm is muted in this manner ALL audible alarms will be muted 2 29 Calibration of Adaptive Steering Performance vs Speed The Speed Adaptive operating mode is based on...

Страница 50: ...ey operation to exit the calibration mode 2 29 iii To calibrate Adaptive Autopilot Steering vs Speed Calibration parameters 4 5 and 6 require minimum normal working and maximum vessel speeds in a full...

Страница 51: ...ntrols for optimum steering performance sections 2 19 2 25 refer at the lowest realistic working speed likely for Autopilot control Enter the Controls Menu by pressing the CONTROLS key b Simultaneousl...

Страница 52: ...NT888G MK2 AUTOPILOT OPERATING MANUAL...

Страница 53: ...ering mode is operational using the HTC sentence it is possible for the Track Control system to override the Rudder limit value set within the Autopilot LIMITS Menu 2 32 Setting Rate of Turn Control i...

Страница 54: ...libration value v Exit the Set Up Menu simultaneous 5 second operation of the CANCEL and CONFIRM keys To Adjust the ROT Calibration Value Manually proceed as follows Manual ROT Calibration i If the Au...

Страница 55: ...ill not be affected by external factors such as Track Control data etc Accordingly the maximum Safe Rate of Turn limit set is the absolute maximum the Autopilot will permit during automatic heading co...

Страница 56: ...rent value 0 1 to 9 9 iii Use the rotary illum control to set RAD nm value required In the event that Speed over the Ground SOG data is absent or that SOG is to slow to adequately control specified Ra...

Страница 57: ...is feature prevents unnecessary alarms due to natural yaw periodic motion of the vessel ii OHA ALARM TIMEOUT Parameter No 69 in the Set Up Menu this can be programmed from 30 to 120 seconds in 1 secon...

Страница 58: ...s for 5 seconds until the Set Up Menu is displayed with a blue cursor highlighting the Set Up parameter currently selected b Rotate the Autopilot Set Course Control to move the cursor to parameter num...

Страница 59: ...er 1 step course changes Sections 2 12 2 13 refer A Control Unit generated alarm requesting confirmation CONFIRM key is subject to a programmable timeout period 20 to 60 seconds via the SET UP Menu du...

Страница 60: ...G MK2 is a Wheelmarked Autopilot IMO A342 ix as amended by MSC 64 67 Annex 3 in addition to HSC Certification ISO 16329 with an approved Track steering facility provided the latter is used in conjunct...

Страница 61: ...t will use its own LIMITS Menu set value Track Data is only accepted when the Autopilot TRACK keypad is activated confirmed by illumination of the corner LED Without TRACK keypad acceptance corner LED...

Страница 62: ...ata type xxHTC received from an Approved Track Control System will be acted upon fully automatically no CANCEL CONFIRM action required per full Track Control System steering performance specs CONFIRM...

Страница 63: ...iation A Navitron Heading Sensor Coil type HSC 1 or HSC 2 attached above or below a magnetic compass to transmit heading information to the Autopilot system will be subject to any deviation errors ass...

Страница 64: ...y shows SAVE g Press the AUTOTRIM key to save the data which will be confirmed by the message END 2 39 ii Manual Deviation Correction Procedure a Enter the Set Up Menu by 5 second simultaneous CANCEL...

Страница 65: ...nflict thus address changes will be required See Section 3 0 of the Installation and Technical Manual When two or three Control Units are correctly installed with different address numbers address No...

Страница 66: ...eer inputs to this port can provide one of three installation selectable working modes programmed via the Autopilot SET UP Menu 2 43 i Normal proprietary Follow Up Power Steer Typically a proprietary...

Страница 67: ...ung lever will initiate a fixed and safe angle of rudder speed related and calibrated during Sea Trials Release of the jog lever sprung back to centre will leave the rudder at the calibrated angle but...

Страница 68: ...Up Menu is displayed with a black cursor highlighting the Set Up parameter currently selected b Rotate the Autopilot Set Course Control to move the cursor to parameter numbers 75 78 NORM HSC LATCH JO...

Страница 69: ...isplay Messages Alarms and Status Indicators 3 1 Displays at Power Up Self Test 3 2 Failure Messages at Power Up Self Test Failure 3 3 Operational Display Messages 3 4 Alert Display Messages 3 5 Alert...

Страница 70: ...n iv Control Unit Address identity v Master status if applicable vi Distribution Unit software versions 6 items The message WAITING flashing may also be shown on the splash screen to indicate that the...

Страница 71: ...ilot engaged in Track Steer Mode controlling Rudder only x TRACK Autopilot engaged in Track Steer Mode controlling Thruster only xi TRACK Autopilot engaged in Track Steer Mode with Rudder Thruster xii...

Страница 72: ...ert remotely from the BAM system Alert Text Message Text Alert Type No alert None Lost HDG control HCS Failed Switch to Manual steering Alarm Doubtful heading Deviation between heading sources exceede...

Страница 73: ...n fallback Gyro 1 lost normal HC using Step HDG Caution HDG in fallback Gyro 2 lost normal HC using Gyro 1 Caution HDG in fallback Gyro 2 lost normal HC using Mag Compass Caution HDG in fallback Gyro...

Страница 74: ...NT888G MK2 AUTOPILOT OPERATING MANUAL Active silenced warning Active acknowledged warning Rectified unacknowledged warning Caution Table 3 4 2 Alert Icons continued...

Страница 75: ...s for a period of 5 seconds until DIAGS appears on the Control Unit display to confirm entry to the diagnostic mode iii There are 13 diagnostic screen sets which are displayed stepped through in turn...

Страница 76: ...HCC 1 FAIL NMEA Channel 1 HCC Heading sentence fail HDT 2 FAIL NMEA Channel 2 HDT Heading sentence fail HDG 2 FAIL NMEA Channel 2 HDG Heading sentence fail HDM 2 FAIL NMEA Channel 2 HDM Heading sente...

Страница 77: ...OFF Mode ii O ON Corner LED illuminated confirms Autopilot ON Rudder only Mode iii O ON Corner LED on confirms Autopilot ON Thruster only Mode iv O ON LED on confirms Autopilot ON Rudder Thruster Mod...

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