Digital Selector Switch AlphaMiniCourse Gyro Compass

The information in this Manual is subject to change without notice and does not represent a commitment on the part of ALPHATRON MARINE B.V. Document : Digital Selector Switch Alphaminicourse Issue : 1.2 © ALPHATRON MARINE B.V.

ALPHATRON MARINE B.V. Schaardijk 23 3063 NH ROTTERDAM The Netherlands Tel: +31 (0)10 – 453 4000 Fax: +31 (0)10 – 452 9214 P.O. Box 210003 3001 AA ROTTERDAM Web: www.alphatronmarine.com Mail: [email protected]

Digital Selector Switch AlphaMiniCourse Gyro Compass

Installation and Operation MANUAL

ALPH~TRe N Marine

Digital Selector Switch Issue 1.2 of 39

DIGITAL SELECTOR SWITCH ALPHAMINICOURSE

This installation and operation MANUAL of the Digital Selector Switch is an important part of the

Alphaminicourse gyrocompass that is designed for marine & river vessels or high-speed vessels

(including those sailing in high latitudes). It provides measurement of heading and computation

of rate of turn for navigation and steering of vessels.

Only authorized personnel may operate the Digital Selector Switch after studying this Manual.

ALPH~TRe N Marine



CAUTIONARY NOTICES

Please note the following cautionary notices that apply throughout this Manual.

WARNING

The Digital Selector Switch weights 6,5 kg. To avoid personal injury, take proper

precautions if the equipment is lifted or moved.

CAUTION!

Retain the original transit cases so they can be used to transport the gyro compass

when necessary. One will void the warranty if improper packing during

transportation is used.

CAUTION!

If the Digital Selector Switch is placed in an enclosed space, make certain there is

sufficient ventilation and circulation of free air to allow effective cooling.

CAUTION!

Do not make any connections to the Digital Selector Switch with power on the supply

cable.

CAUTION!

Only certified uninterrupted power supplies shall be used for the Digital Selector

Switch operation.

CAUTION!

DO NOT modify this equipment in any way without obtaining a written permission

from ALPHATRON MARINE otherwise you will void the warranty.

ALPH~TRe N Marine



Contents 1 WARRANTY ..................................................................................................................... 5

2 INTRODUCTION .......................................................................................................... 5

2.1 Functions ................................................................................................................... 5

3 INSTALLATION ................................................................................................................. 6

3.1 Cable types ................................................................................................................ 7

3.2 Terminal overview on boards ........................................................................................ 7

3.3 Power supply terminal ................................................................................................. 8

3.4 Inputs terminals ......................................................................................................... 8

3.5 Output terminals ........................................................................................................ 9

3.6 Connecting an AlphaMiniCourse Gyrocompass to Digital Selector Switch .......................... 10

4 OPERATION .................................................................................................................... 11

4.1 Control Unit ............................................................................................................. 11

4.2 Adjustment mode Input & Output ............................................................................... 12

4.3 Main Operation Mode ................................................................................................ 14

4.4 Power-On ................................................................................................................ 15

4.5 Menu mode and Edit mode ......................................................................................... 16

4.5.1 Software Information .......................................................................................... 16

4.5.2 Selection of Gyrocompass or External heading sources ............................................ 16

4.5.3 Latitude Correction ............................................................................................. 16

4.5.4 Speed Correction ................................................................................................ 17

4.5.5 Allowable heading difference ................................................................................ 18

4.5.6 Operation Mode GC or DG .................................................................................... 18

4.5.7 Drift Compensation mode .................................................................................... 18

5 FAILURES ...................................................................................................................... 20

5.1 Built-in Test Equipment ............................................................................................ 20

5.2 Fuses & Replacement ................................................................................................ 20

5.3 Failure messages and Remedy .................................................................................... 21

6 TECHNICAL DATA ........................................................................................................... 22

6.1 Specifications ........................................................................................................ 22

6.1.1 Power Requirements ........................................................................................... 22

6.1.2 Signal Inputs...................................................................................................... 22

6.1.3 Signal Outputs ................................................................................................... 22

6.1.4 Dimensions and Weight ....................................................................................... 22

6.2 Data Formats .......................................................................................................... 23

6.2.1 IEC 61162 Serial Data Formats – General Information............................................. 23

6.2.2 Inputs ............................................................................................................... 23

6.2.3 Outputs ............................................................................................................. 29

7 WARRANTY REGISTRATION FORM ..................................................................................... 33

8 CONNECTIONS FORM ...................................................................................................... 34

9 INPUT & OUTPUT SETTINGS FORM .................................................................................... 35

APPENDIX A – Connection Diagram Switch Unit ..................................................................... 36

APPENDIX B – Dimensional drawing of Control Unit ................................................................ 37

APPENDIX C- Dimensional drawing of Switch Unit for Bridge mounting ..................................... 37

APPENDIX D- Dimensional drawing of Switch Unit .................................................................. 39

ALPH~TRe N Marine



1 WARRANTY

Following the installation of the Digital Selector Switch either a copy of the

Installation / Commissioning report or the Warranty Registration Form is to be sent

to Alphatron Marine in Rotterdam ([email protected]) within two

weeks. Carefully note that the Installation / Commissioning report should cover at

minimum the information as requested on the Warranty Registration Form. The

Warranty Registration Form can be found in chapter 8. One should obey this

procedure to validate the warranty.

Following the installation of the Digital Selector Switch a Connection and Input &

Outputs Forms is to be sent to Alphatron Marine in Rotterdam

([email protected]) together with the Warrant Registration Form. This

information is requested for presetting of an exchange ALPHAMINICOURSE before it

is send to replace the defected ALPHAMINICOURSE.

2 INTRODUCTION

The digital Selector Switch is designed for the gyrocompasses control and building up a system of

several Alphaminicourse gyrocompasses or other external heading indicators. The Digital Selector

Switch consists of an Switch Unit and Controller. All data is displayed on the controller. The number

of units may vary from 1 to 4. Interfaces of the Selector Switch are similar to the Alphaminicourse

gyrocompass interfaces. All AlphaMiniCourse gyrocompasses connected to the unit are controlled

from one control box. Each gyrocompass may be individually switched on or off (including its inner

power supply). Before connection to the selector switch all Alphaminicourse gyrocompasses shall

be tested and adjusted.

2.1 Functions

❑ The single control unit for all connected Alphaminicourse gyrocompasses. Operation mode

(DG,GPS LOG) latitude and speed values are common to all gyrocompasses.

❑ Receipt of information from GPS and LOG will be translated to all connected gyrocompasses

via the control unit channel

❑ Selector Switch: One of the gyrocompasses is selected as main source. Data from the main

gyrocompass are transmitted to the heading receivers.

❑ Comparison of headings from several gyrocompasses or external heading sources. Only

properly operating gyrocompasses in the readiness state take part in the comparison.

Connected External heading sources are already in readiness state and will take part in the

comparison. The difference in the readings of one gyrocompass compared to all others for

the value that exceeds the setting is considered a failure.

ALPH~TRe N Marine

mailto:[email protected]

mailto:[email protected]



3 INSTALLATION

On example how to configure your Digital Selector Switch system is given in figure 3.1

How to connect an AlphaMiniCourse Gyrocompass can be found in paragraph 3.6.

The Control unit that can be built-in into the bridge front panel.

It is mounted as follows:

1) Cut the window with the mounting holes in accordance with Appendix C

2) Remove the decorative moldings, unscrew 4 screws and remove the cover;

3) Put the unit under the front panel and the cover – on the top of the front panel. Clamp the

panel between the cover and the housing of the unit by four screws. The bridge front panel

shall be 3 to 6 mm thick.

4) On your console panel make the mounting hole for the Switch unit in accordance with

Appendix D

Overview of Appendix in this manual:

Connection diagram is given in the Appendix A

Dimensional drawing of the Control Unit is given in the Appendix B

Dimensional drawing of the Control Unit for bridge mounting is given in the Appendix C

Dimensional drawing of the Switch Unit is given in the Appendix D

The Digital Selector Switch consists of an Switch unit and Control Unit Panel. Inside the Switch Unit

there are terminals located on PCB PP-028 and PCB PP-029. Location of terminals can be found in

figure 3.2.1. and a connection diagram can be found in Appendix A.

Description of the power input terminals this can be found in table 3.3.1;

Description of the input terminals can be found in table 3.4.1

Description of the output terminals can be found in table 3.5.1

Cable types for connection to and from the Digital Selector Switch are specified in table 3.1.1

When using the Alphaminicourse Gyrocompasses or other Gyrocompasses types they should be

aligned so that its fore-aft axis is parallel to the for-aft datum of the vessel. Any misalignment

between the compass housing and vessel will decrease the accuracy of heading measurements

provided by the gyro compass.

Figure 3.1 – Example Digital Selector Switch configuration

ALPH~TRe N Marine

Switch Unit

EXT Heading

GPS & LOG (optional) input

Uninterruptible 24V DC

Outputs: Heading 16x RS422 Heading 4x RS232

Stepper Alarm drycontacts

&NM EA

AIJ'li>JNN

Control Unit

DIQJALKUC'IO.IMrCH Al..fflAMINKOUltM



3.1 Cable types

Table 3.1.1 Suitable cable types

Purpose Suitable cable

Power supply 3 x 1.5 mm² screened cable

RCU from Gyrocompass

Controller Panel

3 x 2 x 0.5 mm² double screened cable

Ready & Fail output

Serial data heading output

STEP output

3 x 2 x 0.5 mm² screened cable

- 10 meters for RS232

- 100 meters for RS422

External Heading Source

GPS input

Pulsed LOG input

LOG NMEA input

2 x 2 x 0.5 mm² screened cable

Earth 6 mm² wire

3.2 Terminal overview on boards

Figure 3.2.1 – Appearance of board PP-028 and PP-029 in the Switch Unit.

ALPH~TRe N Marine



3.3 Power supply terminal

Table 3.3.1 – Power supply input

Location Position Description Pin Terminal pins Signal Description

PP-29

XT23

No.10

IN 24

1 + 24V

Main power supply 2 GND

3

PP-28

XT1

No.9

IN 24V

1 + 24V Input main power PP-28

Already connected 2 0V

3

3.4 Inputs terminals

Table 3.4.1 - Inputs

Location Position Description Pin

No.

Pin Description Signal Description

PP-28

XT4-XT7

No.1

GC1-GC4

1 ─ RS422/RS232 (A) Similarly-named pins of the

RCU connector on

Alphaminicourse or connect

External heading source on

pin 1 & 2 for RS422 of 1 &

6 for RS232

2 + RS422 (B)

3 GND

4 ON/OFF

5 +24V

6 + RS232 (B)

PP-28

XT8

No.2

CONSOLE

1 ─ RS422

Similarly-named terminals

on the Control Unit.

2 + RS422

3 GND

4 ON/OFF

5 +24V

PP-28

XT3

No.3

+ IN III 1 + TTL

Pulsed Log input ─ IN III 2 ─ TTL

+ IN II 3 + RS422 (B)

NMEA GPS input ─ IN II 4 ─ RS422 (A)

+ IN II 5 + RS232 (B)

─ IN II 6 ─ RS232 (A)

+ IN I 7 + RS422 (B)

NMEA LOG input ─ IN I 8 ─ RS422 (A)

+ IN I 9 + RS232 (B)

─ IN I 10 ─ RS232 (A)

PP-029

XT1

No.13

IN 24V 1 +24V

Step interface power supply IN 24V 2 0V

IN 24V 3 NC

Not Connected IN 24V 4 NC

IN 24V 5 +24V

24V DC Output IN 24V 6 0V

ALPH~TRe N Marine



3.5 Output terminals

Table 3.5.1 – Outputs

Location Position Description Pin

No.

Pin Description Signal Description

PP-29

XT6

XT7

No.4

Heading

Channel A

(1-4)

1 RS422 (Tx+)

4x digital outputs

Channel A 2 RS422 (Tx─)

3 RS422 (Tx+)

4 RS422 (Tx─)

PP-29

XT8

XT9

No.4

Heading

Channel B

(1-4)

1 RS422 (Tx+)

4x digital outputs

Channel B 2 RS422 (Tx─)

3 RS422 (Tx+)

4 RS422 (Tx─)

PP-29

XT10

XT11

No.4

Heading

Channel C

(1-4)

1 RS422 (Tx+)

4x digital outputs

Channel C 2 RS422 (Tx─)

3 RS422 (Tx+)

4 RS422 (Tx─)

PP-29

XT12

XT13

No.4

Heading

Channel D

(1-4)

1 RS422 (Tx+)

4c digital outputs

Channel D 2 RS422 (Tx─)

3 RS422 (Tx+)

4 RS422 (Tx─)

PP-29

XT14

No.5

READY

1 RDY CC

Relay contacts

2 RDY NO

3 RDY NC

FAIL

4 FAIL CC

5 FAIL NO

6 FAIL NC

PP-29

XT4

No.6

Heading

Channel A

1 RS232 (Tx+)

Digital outputs 2 RS232 (Tx─)

Heading

Channel B

3 RS232 (Tx+)

4 RS232 (Tx─)

PP-29

XT5

No.6

Heading

Channel C

5 RS232 (Tx+)

Digital outputs 6 RS232 (Tx─)

Heading

Channel D

7 RS232 (Tx+)

8 RS232 (Tx─)

PP-29

XT2

XT3

No.7

STEP

(1 & 2)

1 S1

2x Stepper outputs with

positive common point.

Fuses F3-F7(1A)

2 S2

3 S3

4 +24V

PP-29

XT25

No.8

24V OUT

1 + 24V 24V to PP-28

(already connected) 2 0V

3

PP-29

XT22-XT29

No.11

OUT 24V

(1-8)

1 + 24V 8 power supply outputs for

repeaters. (max load 1A) 2 0V

3 NC

PP-29

XT24

No.12 PANEL 24V to main switch Panel

(already connected)

ALPH~TRe N Marine



3.6 Connecting an AlphaMiniCourse Gyrocompass to Digital Selector Switch

There may be applications where you prefer your AlphaMiniCourse Gyrocompasses to be

controlled by a single control unit of the Digital Selector Switch. For this purpose it is needed to

disconnect the Control Unit of the Alphaminicourse Gyrocompass and replace it with a blanking

plate as shown in figure 3.1.

The following items are needed:

❑ Blanking plate for the Main Unit housing

❑ 10m or 20m 7M2 cable

There is no need to remove the gyrocompass cover to install RCU externally:

1. Release and remove the four М3 screws at the corners of the CU

2. Lift the CU away from the Main Unit.

3. Disconnect the CU cable from the corner socket of analog PCB. Instead of it connect the

second cable that is located nearby.

4. Take out the CU and store it on a save place

If there is no blanking plate present, please keep the CU in place.

5. Connect the 7M2 cable on RCU output of the rear panel from the Main Unit. Route the cable

through the cable gland of the Digital Selector Switch Unit.

6. Connect 7M2 cable in the Digital Selector Switch Unit as shown in below figure and table 3.6

Note:

If you have more AlphaMiniCourse Gyrocompasses to be controlled by the Digital

Selector Switch they can be connected on terminal XT5 (GC2), XT6 (GC3) and XT7

(GC4).

7. Fit the blanking plate to fill the gap left in the cover of the Main Unit after the removal of the

CU.

ALPH~TRe N Marine

AlphaM iniCo urse

Gyrocompass rear

panel

RCU

Output

Pin r-- we

1 r--r--

bn 7M2 cable 2 r-r-- gn

3 r-- ,xi_ 4 -

5 ~ -

Digital Se lecto r

Swit ch Unit

Pin Circuit

;±!!;. 1 -RSIAI bn XT4 - 2 ,RS(B) g n

3 GNO y l

ONIOFF GCl 4 gy - 5 ,24 V

6 RS232



4 OPERATION

4.1 Control Unit

The Control Unit front panel includes all controls for the Selector Switch. Control and indicator

functions of the Control Unit are shown in table 4.1.1

Table 4.1.1 – Control Unit functions

Control Function

System ON/OFF. Hold for at least 1 seconds to switch the system off. The system is

completely switched off after all gyro rotors come to rest

UP Selection. Press to increase display brightness, to select the parameter or to move

the cursor in Menu Mode.

DOWN Selection. Press to increase display brightness, to select the parameter or to

move the cursor in Menu Mode.

LEFT Selection. Press to move the cursor in the Menu Mode

RIGHT Selection. Press to move the cursor in the Menu Mode

MENU Button. Press to enter the Menu Mode or to insert the changes of parameters

that were made.

CANCEL Button. Press to quit from the Menu Mode or to cancel the changes that

were made in parameters.

Press to silence the audible alarm in case of failure

Adjustment of brightness applies to the Control Unit display and to the backlighting of all connected

AlphaMiniCourse gyrocompasses dials.

A cursor on the display has a form of a highlighted rectangular and is moved by the arrow buttons

to select a parameter that needs to be changed.

By pressing the button “ MENU” you may select the Edit mode for the selected parameter, in this

case the cursor will start flashing. The parameter is changed by the buttons “▲” and “▼”. You

should press the button “ MENU” to accept the change or the button “Esc” to cancel the change.

By pressing any of these buttons you close the Edit mode and return to the Selection mode.

By pressing the button “Esc” in the Selection mode you will finalize the adjustment and store all

changes in the unit’s nonvolatile memory. The unit returns to its usual operating mode.

If you switch off the unit in the interface Adjustment mode, all changes that were made are lost.

The unit and the AlphaMiniCourse Gyrocompass have similar formats of sentences. Transmission

rate in the mode “All Data” is also 1 time per second despite of the frequency setting.

ALPH~TRe N Marine

•



4.2 Adjustment mode Input & Output

To enter the interface Adjustment mode press and hold the buttons “◄” and “►” and then switch

the system. On the Control Unit display you will see a Table similar to the one given below:

Figure 4.2.1 – Adjustment mode

The first line of the table of the digital outputs is its title describing its six parameters:

Chn – channel, where All – general tunings (for all channels);

Baud. – transmission speed;

Freq. – transmission rate;

Prec. – heading accuracy;

Chk – checksum;

Message – sentences

In the first line of the table digital input can be selected of maximal 4 heading sources.

Input - incoming heading source sentences

The second line from the bottom is for the speed log adjustment.

The bottom line is for the S-interface adjustment.

Possible values for all parameters are given in the Table 4.2.1

Table 4.2.1 – Control Unit parameters

Parameter Value Function

Baud.

4800

9600

19200

38400

Baud rate

4800 baud (digital output RS232 and RS422)*

9600 baud (digital output RS232 and RS422)



Freq.

1

10

20

Transmission rate

1 time per second (digital output RS232 and RS422)

10 times per second (digital output RS232 and RS422)*

20 times per second (digital output RS232 and RS422)

Prec.

.1

.01

Heading decimal place (accuracy)

One decimal place (heading digital output)*

Two decimal places (heading digital output)

Chk

Off

On

Checksum field

No checksum transmitted (digital output RS232 and RS422)*

Checksum transmitted (digital output RS232 and RS422)

ALPH~TRe N Marine



Table 4.2.1 – Control Unit parameters (continued)

Message

HDT

HDT+ROT

HDT+VHW

VHW+ROT

THS

THS+ROT

THS+VHW

All

Output sentences

HDT (digital output RS232 and RS422)*

HDT + ROT (digital output RS232 and RS422)

HDT + VHW (digital output RS232 and RS422)

VHW + ROT (digital output RS232 and RS422)

THS (digital output RS232 and RS422)

THS+ROT (digital output RS232 and RS422)

THS+VHW (digital output RS232 and RS422)

All Data (digital output RS232 and RS422)** Input

PGM

4800

9600

19200

38400

Input sentences

Control signal AlphaMiniCourse Gyrocompass***

Baud rate External heading source HDT,HDG,HDM or THS*

Baud rate External heading source HDT,HDG,HDM or THS



Log type

NMEA

100

200

400

Log input

NMEA log*

100 pulse per nautical mile



LOG_OK

Off

On

Disable of RS 232 from the log

Control is off*

Control is on

STEP limit

0

6

12

Limitation of S-interface rate

Without limitation*

Up to 6 °/s

Up to 12 °/s

*factory default settings

** The Digital Selector Switch and the AlphaMiniCourse Gyrocompass have the similar formats of

sentences. Transmission rate in the mode “ALL Data” is also 1 time per second despite of the

frequency setting.

***When AlphaMiniCourse Gyrocompasses are connected their own Control Unit(display) must be

replaced by a blank plate.

ALPH~TRe N Marine



4.3 Main Operation Mode

Figure 4.3.1 - Main operation mode

Operating modes and states are given in the Table 4.3.1

Table 4.3.1 Operating modes

System

operating

mode

GC – gyrocompass mode

DG – heading storage mode (Directional Gyro)

State of the

main GC

START – the unit switching on

ALIGN – alignment or operation in the DG mode from the start-up

READY – readiness*

STOP – accelerated gyroscope run-out after the unit switching off

Latitude

input mode

MAN – manual

GPS – from GPS receiver

Speed

input mode

MAN – manual

GPS – from GPS receiver

LOG – from speed log

Status Table of Gyrocompasses states.

Off – totally de-energized

On – switching on and activation

RDY – readiness*

STP – accelerated gyroscope run-out after the gyrocompass or system switching off

SS RDC DSP PWR – failure messages of AlphaMiniCourse Gyrocompass

Heading Table of gyrocompass heading readings.

An asterisk on the left indicates the main gyrocompass.

If instead of heading there is a “no” message, it means that there is no connection

between the unit and the gyrocompass.

The readings start flashing in case the difference is higher than it is allowed.

Maximum

allowable

difference

The value in degrees, from 1 to 9 or ∞ – infinity, i.e. comparison function is off

*indicators RDY and READY appear only in the gyrocompass operating mode, they are flashing

when DG mode is automatically activated for some period of time

012.3 GC READY

Man 52°N

Man 00Kn

Heading of the main GC

State of the main GC

Latitude; N – North

S – South

Speed in knots

Latitude input mode

Speed input mode

*012.3 RDY

012.6 RDY

Off

Off

δ=5

System operating mode Heading Status

Maximum allowable difference

ALPH~TRe N Marine



4.4 Power-On

To initialize the Digital Selector Switch operation you shall do the following:

1. Check that there is a nominal 24V DC electrical supply available to the gyro compass.

The acceptable supply range is 9 VDC to 36 VDC.

2. Check the RCU connection on back panel from the AlphaMiniCourse Gyrocompass to Switch

unit of Digital Selector Switch.

3. Press and hold the buttons “◄” and “►” and then switch ON the system.

4. Set your requirements in the Adjustment mode by following the instructions of paragraph 4.2

and when done close with “Esc”

5. The Control Unit will enable the audible alarm for 1 second. The display will show as pictured in

figure 4.3.1.

6. Select operational Gyrocompasses or External heading sources and determine the main source

in the Menu Mode by following the instructions of paragraph 4.5.2.

7. Set the source of latitude information in the Menu mode by following the instructions of

paragraph.4.5.3.

8. Set the source of speed information in the Menu mode by following the instructions of p

paragraph 4.5.4.

9. Set the maximum allowable heading difference in the Menu mode by following the instructions

of paragraph 4.5.5.

10. If needed set Operation mode (Gyro compassing GC and Directional gyro DG) by following

the instructions in paragraph 4.5.6

11. If needed a Drift adjustment can be done once a year after installation by following the

instructions in paragraph 4.5.7

If any failures arise when following the above steps please follow the instructions given

in chapter 5

ALPH~TRe N Marine



4.5 Menu mode and Edit mode

You may enter the Menu mode by pressing the button “ MENU”. You will see a cursor in the form

of a highlighted rectangular on one of the items on the display. The cursor can be moved by arrow

buttons to select the parameter that has to be changed.

You may change the selected item in the Edit mode that is activated by pressing the button

“ MENU”, the cursor will start flashing. The parameter is changed with the help of the buttons

“▲” and “▼”. You should press the button “ MENU” to accept the change or the button “Esc” to

cancel the change. By pressing any of these buttons you close the Edit mode and return to the

Menu mode.

4.5.1 Software Information

In Menu mode on the bottom of the display you will find the information about the software

version:

CMPC-x.x RCC-y.y

Where x.x – is the version for the CoMParator Core (Switch Unit) software;

y.y – is a version for the Remote Console Control (Display).

To quit from Menu mode, press the button “Esc”

4.5.2 Selection of Gyrocompass or External heading sources

Selection of the operating gyrocompasses or external heading sources and of the main heading

source is made in the Menu of the main operating mode. Moving the cursor downwards on the

display left field select the channel, from GC1 to GC4. In the Edit mode select one of the GC states:

| ON

* Main

O Completely OFF

The selected state is confirmed by the button “ MENU” and is displayed.

On default all gyrocompasses are ON (factory setting).

You may switch on/off any gyrocompass at any time. The selected configuration of the system will

automatically restore after the unit re-start.

If the main GC is not selected, the first gyrocompass that is switched on will become the main

gyrocompass.

4.5.3 Latitude Correction

The Control Unit of the digital selector switch accept latitude information from an GPS receiver.

However, you may input this information manually, if an GPS source is not available. When using

GPS it will allow automatic corrections to be applied without operator intervention.

Note: Latitude corrections will only apply to AlphaMiniCourse Gyrocompasses set as PGM input.

1) Enter Menu mode as described in section paragraph 4.5

2) Set the desired correction mode (from manual or GPS).

MAN: Latitude input manually, use the buttons “▲” and “▼”. The latitude changes with

increment of 1 degree in the range from 89°N to 89°S.

GPS: Automatic latitude corrections from GPS input. The Speed input will be automatically set

to GPS in case LOG input is not selected.

ALPH~TRe N Marine



If there is no valid input from GPS receiver, the display will indicate the alarm NO GPS in

10 seconds.

If the input is not recognized or is invalid during 10 seconds, in the right-hand bottom

corner of the display you will see the alarm ??? GPS (input format is not recognized) or

ERROR GPS (input checksum is invalid).

3) Quit from the Menu mode by the button “Esc”.

If operating latitude is selected manually, remember to change the setting when

necessary.

In medium latitudes, a 10° error in setting the operating latitude will result in compass

error of approximately 0.5°.

4.5.4 Speed Correction

The Control Unit of the digital selector switch accept speed information from an LOG receiver.

However, you may input this information manually, if an LOG source is not available or when using

GPS it will allow automatic corrections to be applied without operator intervention.

Note: Speed corrections will only apply to AlphaMiniCourse Gyrocompasses set as PGM input.

1) Select LOG input in Adjustment mode described in paragraph 4.2.

2) Enter the Menu mode as described in paragraph 4.5.

3) Set the desired correction mode (from manual, GPS or LOG).

MAN: To select automatic speed compensation from log, use the buttons “▲” and “▼”. The

speed changes with increment of 1 knot in the range from 0 to 90 knots.

GPS: Automatic speed corrections from GPS input. The Speed input will be automatically set

to GPS in case LOG input is not selected.

LOG: Automatic speed corrections from LOG input.

If there is no NMEA signal from log, the display will indicate the alarm NO LOG in

10 seconds.

If input is not recognized or is invalid within 10 seconds, the display will indicate the

alarm ??? LOG (input format is not recognized) or ERR LOG (input checksum is invalid).


Selected speed values and modes are restored after re-started.

If the vessel speed is selected manually, remember to set the average vessel speed and

to change the setting when necessary. On completion of the voyage return the setting to

zero. For a vessel steaming along the meridian, a 5-knot error in speed setting will

generate an error of approximately ± 0.5°.

ALPH~TRe N Marine



4.5.5 Allowable heading difference

The Digital Selector Switch is able to monitor the incoming heading sources and compare it with

the main selected source.

Note: Only heading sources in readiness state take part in the comparison.

1) Enter Menu mode as described in section paragraph 4.5

2) Go to δ and use the buttons “▲” and “▼”. The heading difference changes with increment

of 1 degree in the range from 1 to 9 or ∞ to turn it OFF.


4.5.6 Operation Mode GC or DG

1) Enter the Menu mode as described in paragraph 4.5

2) Select the operating mode.

GC: In the GC mode the connected AlphaMiniCourse operates as a North-seeking unit.

DG: In the DG mode it stores the direction. In this mode you may use the gyrocompass as

a direction indicator all the way up to the poles. If the gyrocompass was settle on North

immediately prior to entering the DG mode, it will continue to provide a useful indication of

the northerly direction for a period, but will not continue to seek North. The length of time

that the direction indication remains valid depends entirely on the gyro drift characteristics.


The latest operating mode that was set will preserved in the software and is restored after

switching on.

Note: The AlphaMiniCourse set as PGM input will not be north seeking while operating in

the DG mode.

4.5.7 Drift Compensation mode

According to the manual of the AlphaMiniCourse a drift adjustment can be carried out once a year

after installation on the vessel or as well after repair or a long idle time. Drift compensation is

made when vessel is moored to the berth.

Note: Drift adjustment will only apply to AlphaMiniCourse Gyrocompasses set as PGM input.

In 12 hours record the value of the current heading КГ from the Control Unit. By taking the bearing

determine the gyrocompass correction value:

H = Hb – Hg,

where Hb – the vessel heading received as a result of the direction finding, degree;

Hg – the current heading of the vessel in accordance with the gyrocompass, degree.

1) Switch off the Digital Selector Switch control unit.

2) In 5 minutes set the control unit into the drift compensation mode by pressing at first the

buttons “▲” and “▼” and then the button . In this mode the gyrocompass and the

servo system are de-energized.

ALPH~TRe N Marine

[ii



The display will show the following:

Figure 4.5.7.1 – drift compensation mode

GC: Connected AlphaMiniCourse set as input PGM

S/N: Serial number of connected AlphaMiniCourse

Hours: Total amount of operational hours of the AlphaMiniCourse

Drift: Automatically calculated drift compensation

Heading: Gyrocompass correction

3) With the help of “▲” and “▼” buttons set the value of correction H. The input range is from

minus 9.9 to 9.9 degrees.

4) Pressing the button “ MENU” set the gyrocompass to standard operating mode with the

new value of the horizontal drift.

5) Pressing of the button “Esc” or the unit switching off do not lead to any correction of the

gyrocompass. After the adjustment the gyrocompass shall operate in the GC mode not less

than 5 hours and then the gyrocompass correction value H. should be determined once

again. The value of correction shall not exceed 0.2. Otherwise the adjustment should be

repeated.

ALPH~TRe N Marine



5 FAILURES

When switched on and in the main operating mode the Switch Unit will display the data about any

detected failure of the system. The text message is accompanied by the audible alarm that is

disabled by the button .

If there is no connection between the Control Unit and its Switch Unit, the message “MAIN UNIT

LINK FAILED” will appear on the empty screen of the display.

When the Control Unit and its Switch Unit are linked, you will see information about failures of

every controlled gyrocompass in the left-hand field of the display (in the columns of heading and

status) in the main operating mode.

Failure messages for the main GC as well as system warnings (concerning GPS or log) are shown in

the right-hand bottom corner of the display. See the details in the Table 5.3.1.

5.1 Built-in Test Equipment

The Digital Selector Switch and controlled connected AlphaMiniCourse Gyrocompasses performs a

self-test routine during the initialization sequence and monitors its status continually during normal

operation. Any deviation from normal operation appears as an error message with the indication of

cause on the display.

5.2 Fuses & Replacement

You can easily replace the fuse, this procedure does not require any special skills.

The main fuse of 3.15A is located on the Switch Unit front side, you should take it out of its

receptacle and replace.

Self-healing fuses are located on the backside of PP-028 but do not need to be replaced.

Function of the self-healing safety fuses are described in table 5.2.1.

All fuses described below have a maximal value of 1 Ampere.

Table 5.2.1 – Description of self-healing safety fuses

Number Function

F1 Power input from the mains of 24 V DC

F2 Power input of S-interface (STEP)

F3 Output Step1 of S-interface



F6 Power output 1 of S-interface

F7 Power output 2 of S-interface

F8-F15 Power outputs of periphery, from 1 to 8 correspondingly

ALPH~TRe N Marine



5.3 Failure messages and Remedy

Table 5.3.1 – Failure messages and remedy

Message

on the left

Message in

the bottom

right-hand

corner

Description Remedy

no LINK

No connection between the Switch

Unit and the gyrocompass or

external heading source

Check connection between

Switch Unit and heading

source

??? LINK Input format is not recognized

Check input selection and

link or polarity of the

connection.

SS SERVO Servo system failure

Failure due to component

damage and cannot be

corrected in field; is to be

sent to the manufacture or

approved service center

RDC RDC Failure of the heading converter on

the digital board






DSP DSP Signal processor failure on the

analog board






PWR POWER Malfunction of inner power supply






Flashing

heading

Allowable difference of the heading

compared to the readings of other

GC is exceeded

Compare heading with a true

heading mark and if needed

do a drift compensation

NO GPS* Loss or distortion of the signal

from the GPS receiver

Check the link and polarity of

connection

??? GPS* Format of the GPS receiver signal

is not recognized

Adjust the GPS transmission

ERROR GPS* Signal from the GPS receiver is

invalid (wrong checksum)

Adjust the GPS transmission

GPS* No validity check of GPS data Adjust the GPS transmission

NO LOG* Loss or distortion of the log signal Check the link and polarity of

connection

??? LOG* Format of the log signal is not

recognized

Adjust the LOG transmission

ERROR LOG* Signal from log is invalid (wrong

checksum)


LOG* Signal «Log disable» (in case it is

active at GC)


Failure relay is activated in conditions that are marked BOLD in the table.

*Use manual corrections in case in the correct operation cannot be provided by GPS or LOG.

ALPH~TRe N Marine



6 TECHNICAL DATA

6.1 Specifications

6.1.1 Power Requirements

Voltage: 24V DC (acceptable range 9 VDC to 36 VDC)

Power consumption: 4 W

CAUTION!

To comply with the requirements of IMO Res. A.694(17) and IMO Resolution

А.821(19), the Digital Selector Switch shall be powered by an uninterruptible power

supply.

6.1.2 Signal Inputs

Heading (4 Max) : RCU signal from Alphaminicourse Gyrocompass or

External Heading source IEC 61162-1/2(2016)

Latitude : IEC 61162 RS232 or RS422 from GPS

Speed : pulse at 100, 200 or 400 per nautical mile from log

IEC 61162 RS232 or RS422 from GPS or log

6.1.3 Signal Outputs

S-type heading : 2 х step-by-step, 6 steps/degree (24V TTL level)

Update 6°/s, 12°/s, unlimited

Serial data outputs : Channel A : 1 х RS232 ; 4 x RS422 ;

Channel B : 1 х RS232 ; 4 x RS422 ;

Channel C : 1 х RS232 ; 4 x RS422 ;

Channel D : 1 х RS232 ; 4 x RS422 ;

Serial data formats : IEC 61162-1/2(2016)

Serial data transfer rate (baud) : 4800 ; 9600 ; 19200 ; 38400

Serial data transfer frequency : 1Hz (1sec) ; 10 Hz (100msec) ; 20 Hz (50msec)

Status/alarm : Ready - NO relay/NC relay

Failure - NO relay/NC relay

6.1.4 Dimensions and Weight

Dimensions Controller (flush mount) : 110mm (H) х 200mm (W) х 95mm (D)

Dimensions Controller : 133mm (H) х 235mm (W) х 125mm (D)

Dimensions Switch Unit : 240mm (H) х 345mm (W) х 135mm (D)

Total weight : 6.5 kg

Controller weight : 2.5 kg

Switch Unit weight : 4 kg

ALPH~TRe N Marine



6.2 Data Formats

6.2.1 IEC 61162 Serial Data Formats – General Information

The Digital Selector Switch accepts and transmits asynchronous serial data through RS232 and

RS422 lines using 8 data bits, 1 stop bit and no parity. In each packet the least significant bit

goes the first. The most significant bit of the 8-bit character will always be zero.

Baud rate = 4800

Data bits = 8 (bit D7 is always zero)

Parity = none

Stop bits = one

Figure 6.2 – Serial data format

All data is interpreted as ASCII characters that form IEC 61162 sentences split into individual

fields. All fields, including null fields, are separated by commas.

The IEC 61162 format supports an optional checksum, if included. The checksum occurs as an

additional field immediately before the carriage return line-feed characters. It consists of an

asterisk (*) followed by a checksum derived by exclusive OR-ing the eight data bits of each valid

character preceding the asterisk, but excluding the $ symbol, in the sentence. The absolute value

of the checksum is transmitted in ASCII characters representing the value in HEX. IEC 61162

sentences are transmitted ten times a second.

6.2.2 Inputs

6.2.2.1 IEC 61162 Input Signals

The Digital Selector Switch will accept sentences in both data formats: IEC 61162-1(2016) and

control signal of the AlphaMiniCourse gyrocompass.

The following input sentences of External eading sources are accepted:

❑ HDG as shown in figure 6.3

❑ HDM as shown in figure 6.4

❑ HDT as shown in figure 6.5

❑ THS as shown in figure 6.6

In the following descriptions of input sentences, the Switch Unit uses the data fields marked ‘XXX’

in IEC 61162 sentence. The Switch Unit does not use the fields marked '???' and their descriptions

are included here for completeness only. The Switch Unit will recognize the arriving sentence

format and automatically extract the required data from it.

1 2 3 4 5 6

| | | | | |

$--HDG,x.x,x.x,a,x.x,a*hh<CR><LF>

1) Magnetic Sensor heading in degrees

2) Magnetic Deviation, degrees

3) Magnetic Deviation direction, E = Easterly, W = Westerly

4) Magnetic Variation degrees

5) Magnetic Variation direction, E = Easterly, W = Westerly

6) Checksum

Figure 6.3 - IEC 61162 HDG input sentence structure

Start D0 D1 D2 D3 D4 D5 D6 D7=0 Stop

ALPH~TRe N Marine



1 2 3

| | |

$--HDM,x.x,M*hh<CR><LF>

1) Heading Degrees, magnetic

2) M = magnetic

3) Checksum

Figure 6.4 - IEC 61162 HDM input sentence structure

1 2 3

| | |

$--HDT,x.x,T*hh<CR><LF>

1) Heading Degrees, True

2) T = True

3) Checksum

Figure 6.5 - IEC 61162 HDT input sentence structure

1 2 3

| | |

$--THS,xxx.x ,a*hh<CR><LF>

1) Heading Degrees, True

2) Mode identifier

3) Checksum

Figure 6.6 - IEC 61162 THS input sentence structure

GPS Interface (see Table 3.4.1 for connection details)

The Alphaminicourse can accept speed, latitude, date and time inputs from GPS in IEC 61162

format using GNS, RMC, GLL, GGA, VTG, VHW sentences.

S

tart

chara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

of

recom

mended m

in G

NSS d

ata

UTC o

f positio

n (

hhm

mss.s

s)

Latitu

de (

ddm

m.m

m)

Mnem

onic

for

Nort

h o

r South

Longitude (

dddm

m.m

m)

Mnem

onic

for

East

of W

est

Mode indic

ato

r

Tota

l num

ber

of

sate

llites in u

se (

0-9

9)

Horizonta

l dilution o

f pre

cis

ion

Ante

nna a

ltitude r

ela

tive t

o m

ean s

ea level

Geoid

al separa

tion

Age o

f diffe

rential data

Diffe

rential re

fere

nce s

tation I

D

Checksum

fie

ld

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

rs

Figure 6.7 – IEC 61162 GNS input sentence structure

ALPH~TRe N Marine

$??GNS, ?????? .??,XXXX.XX,X, ????? .??, ?,X--X, ??, ? .?, ? .?, ? .?, ? .?, ? .?*, ??[CRLF] TT ----r-- T , ---,--- --, --,--- --r- ~--,--- ~--,- I



Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

recom

mended m

in G

PS

data

UTC o

f positio

n (

hhm

mss.s

s)

Sta

tus,

A=

valid,

V=

Nav.R

eceiv

er

warn

ing

Latitu

de (

ddm

m.m

m)

Mnem

onic

for

Nort

h a

nd S

outh

Longitude (

dddm

m.m

m)

Mnem

onic

for

East

or

West

Gro

und s

peed in k

nots

Cours

e o

ver

gro

und in d

egre

es

Date

of

fix

Magnetic v

ariation in d

egre

es

Magnetic v

ariation indic

ato

r East

or

West

Mode indic

ato

r

Carr

iage r

etu

rn L

ine feed c

hara

cte

r

Figure 6.8 - IEC 61162 RMC input sentence structure

Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

geogra

phic

al la

titu

de a

nd

longitude

Latitu

de (

ddm

m.m

m)

Mnem

onic

for

Nort

h o

r South

Longitude (

dddm

m.m

m)

Mnem

onic

for

East

or

West

UTC o

f positio

n (

hhm

mss.s

s)

Sta

tus

Mode indic

ato

r

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

rs

Figure 6.9 - IEC 61162 GLL input sentence structure

ALPH~TRe N Marine

$?? RMC, ??????. ?? ,X,XXXX.XX,X, ?????. ?? , ? ,X.X,?.?, ??????,?.?,? ,X[C R L F] T ---,-- ------,--- -~- ---,- -~- T -~- ---, ----,--- ---,--- --,-- ---, ---,

$??G L L,XXXX.XX,X, ?????. ?? , ? , ??????. ?? ,X_X[C R L F] ---, -,--- ------,--- ,-- ---,-- ---,---,



Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

GPS f

ix d

ata

UTC o

f positio

n (

hhm

mss.s

s)

Latitu

de (

ddm

m.m

m)

Mnem

onic

for

Nort

h o

r South

Longitude (

dddm

m.m

m)

Mnem

onic

for

East

or

West

GPS q

uality

indic

ato

r

Num

ber

of

sate

llites in u

se (

00-1

2)

Horizonta

l delu

tion o

f pre

cis

ion

Ante

nna a

ltitude r

ela

tive t

o m

ean s

ea level

Mnem

onic

for

mete

rs

Geoid

al separa

tion

Mnem

onic

for

mete

rs

Age o

f diffe

rential G

PS d

ata

Diffe

rential re

fere

nce s

tation (

0000-1

023)

Carr

iage r

etu

rn L

ine feed c

hara

cte

rs

Figure 6.10 - IEC 61162 GGA input sentence structure

Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

gro

und c

ours

e a

nd

speed

Cours

e in d

egre

es a

nd t

enth

s

Mnem

onic

for

Tru

e h

eadin

g

Cours

e in d

egre

es a

nd t

enth

s

Mnem

onic

for

Magnetic h

eadin

g

Speed in k

nots

Mnem

onic

for

knots

Speed in k

m/h

Mnem

onic

for

km

/h

Mode indic

ato

r

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

rs

Figure 6.11 - IEC 61162 VTG input sentence structure

ALPH~TRe N Marine

$??GGA, ??????. ?? ,XXXX.XX,X, ?????. ?? , ? ,X, ?? , ? . ? , ? . ? , ?, ? . ? , ?, ? . ? , ????[CR L F] T--r--,-- T T--,- --,- ---,-~ T ---,- T ~ ---r-

$?? VTG, ?.?,?,?.?,?,X.X,X,XX.X,X,X[CRLF] T --,- ---,----- ---,----- ,- -----,-- T ---,- T TT



Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

vecto

r headin

g a

nd w

ate

r speed

Headin

g in d

egre

es a

nd t

enth

s

Mnem

onic

for

Tru

e h

eadin

g

Headin

g in d

egre

es a

nd t

enth

s

Mnem

onic

for

Magnetic h

eadin

g

Speed in k

nots

Mnem

onic

for

knots

Speed in k

m/h

Mnem

onic

for

km

/h

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

rs

Figure 6.12 - IEC 61162 VHW input sentence structure

Log Interface (see Table 3.4.1 for connection details)

The Alphaminicourse can accept speed inputs at the log interface in IEC 61162 format using VВW,

VTG and VHW sentences.

Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

gro

und s

peed/w

ate

r speed

Longitudin

al w

ate

r speed in k

nots

Tra

nsvers

e g

round s

peed

Sta

tus:

wate

r speed,

A=

valid,

V=

invalid

Longitudin

al gro

und s

peed in k

nots

Tra

nsvers

e g

round s

peed in k

nots

Sta

tus:

gro

und s

peed,

A=

valid,

V=

invalid

Tra

nsvers

e w

ate

r speed o

f ste

rn in k

nots

Sta

tus:

wate

r speed,

A=

valid,

V=

invalid

Tra

nsvers

e g

round s

peed o

f ste

rn in k

nots

Sta

tus:

ste

rn g

round s

peed,

A=

valid,

V=

invalid

Checksum

fie

ld

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

r

Figure 6.13 - IEC 61162 VBW input sentence structure

ALPH~TRe N Marine

$?? VHW, ??? . ? , ? , ??? . ? , ? ,XX.X,X,XX.X,X[C R L F] ,- --,- ---, ---, ---, T

$?? VBW, ? ? ? ? ? ■ ■ ■ ' ••• ' ■ '

X.X,?.?, X, ?? •• ■' ?, ? .? , ? * hh[CRLF]

-, ---,- -----,---- -----,--- ---,-- ---,-- ----,----- T ----,--- -,- ---,-- -----,--- ---,--



Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

gro

und c

ours

e a

nd s

peed

Cours

e in d

egre

es a

nd t

enth

s

Mnem

onic

for

Tru

e h

eadin

g

Cours

e in d

egre

es a

nd t

enth

s

Mnem

onic

for

Magnetic h

eadin

g

Speed in k

nots

Mnem

onic

for

knots

Speed in k

m/h

Mnem

onic

for

km

/h

Mode indic

ato

r

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

r Figure 6.14 - IEC 61162 VTG input sentence structure

Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

vecto

r headin

g a

nd w

ate

r speed

Headin

g in d

egre

es a

nd t

enth

s

Mnem

onic

for

Tru

e h

eadin

g

Headin

g in d

egre

es a

nd t

enth

s

Mnem

onic

for

Magnetic h

eadin

g

Speed in k

nots

Mnem

onic

for

knots

Speed in k

m/h

Mnem

onic

for

km

/h

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

r

Figure 6.15 - IEC 61162 VHW input sentence structure

ALPH~TRe N Marine

$?? VTG, ?.?,?,?.?,?,X.X,X,XX.X,X,X[CRLF] T ---, ---,----- ----,-- ---, -r- T --,- ---, TT

$?? VHVV, ??? . ? , ? , ??? . ? , ? ,XX.X,X,XX.X,X[C R L F] -,,- T T T T



6.2.2.2 Pulsed Input

The Digital Selector Switch can accept a speed input in the form of pulses occurring at a

frequency of 100, 200 or 400 per nautical mile as selected in Adjustment mode

The Switch Unit determines the vessel speed by reference against the microprocessor timing

circuits. The speed pulses do not need a particular mark/space ratio, but they should have

amplitude from 5 to 10 Volts.

6.2.3 Outputs

6.2.3.1 IEC 61162 Output Signals

The Digital Selector Switch can output serial data through RS232 and RS422 serial lines in

IEC 61162-1(2016) format. Dependent on the settings, the output may contain either:

1. Heading – as described below, OR

2. Heading and Rate of turn – as described below, OR

3. Heading and Speed – as described below.

4. Speed and Rate of Turn

5. All Data

❑ For Heading information the HDT and THS format sentence is used. At the DIP-switch you

may set the resolution for the output to one or two decimal places. Refer to Figure 6.17 and

figure 6.21 for a description of this output format sentences.

❑ For Rate of Turn the ROT format sentence is used. Refer to Figure 6.18 for a description of

this output format.

❑ Speed information is transmitted in VHW format sentence, if the gyro compass is configured

for manual or log input. VHW sentence also contains the heading that is inserted with the

resolution as set by the DIP-switch. Refer to Figure 6.19 for a description of this output

format.

❑ If the All Data mode is selected sentences HDT, ROT,THS, and additional sentences with

coordinates and speed are transmitted. Alarm sentences ALR, ALF and ALC will also be

transmitted. The Data package is transmitted with frequency 1 Hz despite of the

transmission channel settings.

If the GPS mode is on, sentences received from GPS are transmitted as additional: RMC, RMA,

GLL,GGA, GNS, ZDA, VBW, VHW, VTG. Talker identifier (that follows the symbol ‘$’) is changed

for “HE”. Presence of checksums in transmitted sentences is determined by their presence in

received sentences despite of transmission channel settings.

In GPS mode additional sentences look as follows:

$HEGLL, xx00, x,,,, A, M[CRLF]

$HEVTG, xxx.x, T,,, x . x, N, x . x, K, M[CRLF]

Figure 6.16 - IEC 61162 additional sentence structure

Mnemonics for North or South

Latitude (dd)

Speed in km/h

Heading

Speed in knots

ALPH~TRe N Marine

I I



Accuracy of heading and presence of checksums is determined by transmission channel settings.

Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

Tru

e h

eadin

g p

resent

Headin

g in d

egre

es a

nd t

enth

s

Mnem

onic

for

Tru

e h

eadin

g

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

r

Figure 6.17 - IEC 61162 HDT output sentence structure

Sta

rt c

hara

cte

r

Talk

er

identifier

Mnem

onic

for

Rate

of

Turn

Rate

of tu

rn °

/m (

negative f

or

port

turn

)

Sta

tus:

A=

valid,

V=

invalid

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

r

Figure 6.18 - IEC 61162 ROT output sentence structure

ALPH~TRe N Marine

$HEH DT ,XXX.X,X[C R L F] ' --,-- ---,----- ---,

$HEROT,X.X, X[CRLF] T -,--- -----,---- ---,--- T



Sta

rt c

hara

cte

r

Talk

er

identifier

(any c

hara

cte

rs)

Mnem

onic

for

vecto

r headin

g a

nd w

ate

r

speed

Headin

g in d

egre

es a

nd t

enth

s

Mnem

onic

for

Tru

e h

eadin

g

Headin

g in d

egre

es a

nd t

enth

s

Mnem

onic

for

Magnetic h

eadin

g

Speed in k

nots

Mnem

onic

for

knots

Speed in k

m/h

Mnem

onic

for

km

/h

Carr

iage r

etu

rn L

ine-f

eed c

hara

cte

r

Figure 6.19 - IEC 61162 VHW output sentence structure

6..2.3.2 IEC 61162 Sentence with Checksum

If the optional checksum is to be sent with any of the above IEC 61162 sentences, it is added as

an extra field before the carriage return character as shown in Figure 5.16.

Optional checksum

Figure 6.20 - IEC 61162 sentence with optional checksum

The checksum consists of an asterisk followed by the checksum calculated by exclusive OR-ing

the eight data bits of each valid character preceding the asterisk in the sentence, but excluding

the $ symbol. The Alphaminicourse transmits the absolute value of the checksum in ASCII

characters representing the value in HEX.

ALPH~TRe N Marine

$?? VHW, ??? .?, ?, ??? .?, ?,XX.X,X,XX.X,X[CRLF] -, ---,- ------,-- T T -----,-- T T

$HEH DT ,XXX.X, T*hh[C R L F] -,-



In accordance with the standard IEC 61162-1:2010 for the digital heading transmission it is

recommended to use the THS sentence instead of HDT.

$HETHS ,XXX.X, a*hh [CRLF]

Note – Mode identifier

A = autonomous

E = computed (accurate trajectory calculation)

M = manual input

S = simulation mode

V = data not valid (including idle mode)

Figure 6.21 - IEC 61162 THS sentence structure

In the mode All Data the gyro compass failures are transmitted as following:

$HEALR, ,240, A ,x, sss<CR><LF>

$HEALF, 1, 1, 0, ,B, ,x, ,240, y, 1, 0, sss,<CR><LF> $HEALC,1 ,1 ,0 ,n , {,240, y, 1}…<CR><LF>

Where x - acknowledgement indicator (V – No, A – yes);

y – failure code (see Table 5.1);

sss – failure textual description (see Table 6.1);

n – number of failures;

{} – identifier of one failure in the list of failures;

… - list of failures (if more than one).

Figure 6.22 - IEC 61162 ALR, ALF, ALC outputs sentence structure

Table 6.1 – Failure codes and textual descriptions

Code Text Description

1 Servo System Servo System failure

2 DSP Signal processor failure

3 RDC Angle-to-digit convertor failure

4 Power Failure of internal power supply

5 GPS No GPS signal or invalid data

6 LOG No LOG signal or blockage

True Heading in degrees

Mode identifier

ALPH~TRe N Marine



7 WARRANTY REGISTRATION FORM

ALPH~TRe N Marine

Warranty Registrati,on Form1

ALPH~TRe N Telephone: +31(0)10-4534000 P.O. Box 2.1003

Telefax : +31 (0110~4534030 3001 AA Rotterdam

Sit e; www.alphat ronmarine.com The Net herlands

Email: alpha [email protected]

Instal l. Companyit<: Te lephone:

Ema il:

A.dress:

Harbour:

Vesse l Name* :

Vesse l Type:

Technician: Installat ion Date* : DD I MM I yy

I I System*: Type*:

Consisting of/ configu rat ion system* Se rial number*

Connected t o:

Remarks :

NOTE: To validate the warranty oUhis product, please sen.d this cl'ocum ent viia e-maill, fax or

post witlh in two weeks after installation.

Signatu re: I Date* : DD I MM I y y

I I I I I



8 CONNECTIONS FORM

4

5 +24VDC

6 P.5231

5 t 24VDC

6 115231

ALPH~TRe N Marine

Digita l Selector Switch Connection IForm

1 '124VDC

2 C,.DC

3 ¾24VDC

4 C,.DC

5 ¾24VDC

6 C,.DC

Pim Circlit connection cable 1 STl:Pl

2 STEP2

3 STEP3

4 +2iMlC

P,in Cimilt oonneaion 1 11:CC

2 RNO

3 RNC

4 FCC

5 FNO

6 FNC

2 -RS422 jAij

4 -RS4U IA21

Pirn Cima! connection cable

P,in Cimilt oonneaion 1 +2.4\IOC 2

cal>le

!'in, Circuit oonneaion cal>le 1 +2-olV!lC

3, GM)

cable

cable



9 INPUT & OUTPUT SETTINGS FORM

u ai=: -,

z a.,

• ·= a:::

Ji,.,

~~

I a.. ...J ~

TH

S

TH

S+R

OT

TH

S+VH

W

AU

■,MIIHI■

□ □

□

VH

W+

RD

T

0 T

HS

□

TH

S+R

OT

□

TH

S+

vH

W □

ALL

□

TH

S

TH

s+R

OT

TH

s+V

HW

AL

L

ST

EP

Limit

0 □

6 □

12 □

VH

W+

RD

T

TH

S

TH

S+R

OT

TH

s+V

HW

AL

L

PG,v,



APPENDIX A – Connection Diagram Switch Unit

r---

----

----

----

----

----

----

P -

----

----

---

r-U

L7

D

UU

I U

rr-U

LO

D

UU

I u

I

r X5 I

Circ

uit

Pin

Pin

Circ

uit

XP3

~----J

XT2

+24

V

1 1

RS42

2(A1

) XT

4 -2

4 V

2

2 RS

422(

A1)

Circ

uit

Pin

Pin

Circ

uit

IN

+IN1

RS42

2 1

1 -R

S(A)

24

V +2

4 V

3

3 RS

422(

A2

+24

V

5 4

RS42

2(A2

I

+IN1

RS23

2 3

2 + R

S(B)

-IN1

RS42

2 2

3 GN

D

GC1

-24

V

4 XT

7 -2

4 V

6

Pin

Circ

uit

-IN1

RS23

2 4

4 ON

IOFF

XT3

5 +2

4 V

XT

2 1

RS42

2(A3

Circ

uit

Pin

2 RS

422(

A3

Circ

uit

Pin

6 RS

232

TTL

1111

+LOG

1

XTS

STEP

1 1

3 RS

422(

A4

-LOG

2 I

STEP

2 2

4 RS

422(

A4

Pin

Circ

uit

IN2

RS42

2 3

1 -R

S(A)

ST

EP3

3 m

l RS

422

RS42

2

+24V

4

Pin

Circ

uit

+IN2

RS23

2 5

2 +R

S(B)

II

IN2

RS42

2 4

3 GN

D

STEP

XT

3 1

+RS4

22(B

1) GC

2 Ci

rcui

t Pin

2

-RS4

22(B

1)

-IN2

RS23

2 6

4 ON

IOFF

Im

5 +2

4 V

ST

EP1

1 3

RS42

2(B2

STEP

2 2

4 RS

422(

B2

Circ

uit

Pin

6 RS

232

-RS

1 ST

EP3

3 XT

9 XT

6 +2

4V

4 Pin

C

ircui

t +R

S 2

Pin

Circ

uit

Cons

ole

GND

3 1

-RS(

A)

XT4

1 RS

422(

B3

Circ

uit

Pin

2 RS

422(

B3

ON/O

FF

5 2

+RS(

B)

+RS2

32 (A

) 1

3 RS

422(

B4

+24

V

4 3

GND

GC3

-RS2

32 (A

) 2

4 RS

422(

B4

X7

IN 2

4V

XT1

4 ON

/OFF

+R

S232

(B)

3 Pin

Ci

rcui

t Pin

5

+24

V

-RS2

32 (

B)

4 -

1 +2

4 V

1

6 RS

232

-'-

2 -2

4 V

2

RS23

2 XT

S XT

7 -- -

3 ~

3 Pin

C

ircui

t Ci

rcui

t Pin

-=-

+RS2

32 (

() 1

READ

Y !F

AIL

1 -R

S(A)

-R

S232

(()

2

2 + R

S(B)

+R

S232

(D)

3 3

GND

GC

4 -R

S232

(D)

4 4

ONtO

FF

-5

+24

V

''

XT1

J //

XS1

6 RS

232

" ~

XT2J

//

XS2

I- X

C

"' ~

a:

..-

-- -=-XP

1 >

_,.

~

>

~co -~

~

XP2

,_x

1

-Iii

::,

C)

u s: -

"' ~

I

I

XT10

XT

24 ~i

j ____

Circ

uit

Pin

+RS4

22(C

1)

1 XT

15 Pin

Circ

uit

-RS4

22(C

1)

2 1

+24

V

RS42

2(C2)

3 2

-24

V

RS42

2(C2)

4 XT

16 XT

11 Pin

C

ircui

t C

ircui

t Pin

1

+24

V

RS42

2((3

) 1

2 -2

4 V

RS

422(C

3) 2

RS42

2(C4

3

XT17 Pin

C

ircui

t RS

422(

(4

4 1

+24

V

XT12

2 -2

4 V

Ci

rcui

t Pin

+RS4

22(O

1)

1 XT

18 Pin

Circ

uit

-RS4

22(O

1)

2 1

+24

V

RS42

2(D2

3 2

-24

V

RS42

2(D2

4

XT19

xrn

Pin

Circ

uit

Circ

uit

Pin

1 +2

4 V

RS

422(

D3

1 2

-24

V

RS42

2(D3

2

RS42

2(D4

3 XT

2 Pin

Circ

uit

RS42

2(D4

4

1 +2

4 V

XT

14 2

-24

V

Circ

uit

Pin

RC(

1 XT

21 Pin

Circ

uit

RNO

2

1 +2

4 V

RN

C

3 2

-24

V

FCC

4

FNO

5 XT

2 Pin

Circ

uit

FN(

6 I 1

+24

V

2 -2

4 V

"'

~ ~~

I- X

C

C: -

"'

>

·~

c::,

--111

1

:z

u "'

IN 2

4V

OUT

24 V

----

----

----

--, I

------,

Powe

r h

Read

14

Failu

re

1 1

I ..l

6

..l

15

..l

l2

PP-0

37 Bo

ard

-------,

----

, I -:

:i

,17

± ;)';

-, ,

7 -r-

~T

I _

__

_ .J

I I I I ,:

'7

;)';

-Y I I I I

t3

XJ<

~4

~-J

k ➔:J

~2

I 1 ~ K

eybo

ard

XI 'Y PP

-D43

Boa

r d

XP2

xii Pin

Ci

rcui

t

I R5

422(

A-)

2 R5

422(

8+)

J 4 5

XPI

I

Dis

play

CN

2

GND

ON/O

FF

+24

V

'.:b.

r ""C I

s:~

~

;o

5·.

(I)

z

t.

;a

n,



APPENDIX B – Dimensional drawing of Control Unit

ALPH~TRe N Marine

C> C> N ::= ::= co

a::::::Il A.IPtOORON

~ (Q)

(ITD ~ a::::::Il

Fron t View 20 0

DIGITAL SELECTOR SYl1TCH ALPHAMINI COU RSE

11

©® ee BJ G 6§d l!::::,*c::::!I

Back View

Product Digital SelKaif Switch AJ'l-t,J'llWNI ltemCodecG--0073E3-~~ SErialNo: ,!""'~ Cootrol lkl it PKT-51 No: j Production Date: IP 'Il

• ce: C~pm Sa!, m• OrsGnee: 0,5 m . 0054!~~ Power:2◄ VDC Ii] ~

@

\ Grnood Coooec h oo M6

Side View

©

a::::::Il

© (Q)

(Q) © a::::::Il



APPENDIX C- Dimensional drawing of Switch Unit for Bridge mounting

ALPH~TRe N Marine

4x 06m1m

4x MS

CO N 0 O" co "°

,Q,

Cut- Out l82

1'62

-'-----------,0

~t 1.1"1

::;:

lI: 1.1"1 (Y7

Det ail- 1

Bottom View

Cable Gland </J5 - 12mm

43mm + Pane l th ickness * adjust t he nut t o t he proper

M5x60

washer M5

* Nut M5

1.1"1

N ...-t

0 0

0

0

Bridge face pa nel Min. 3mm

Ground [ onnedion M6



APPENDIX D- Dimensional drawing of Switch Unit

ALPH~TRe N Marine

A.PH~

D POWER

D READY

D FAILURE

Front View

DIGITAL SELECTOR SWITCH

Mounting 312

330

Bo t t om View l it open

Ground (onned ion M6

Bottom View

@o o o o o o ~@@ ,@@,@

<ti6mm Side View

132

( ab le Gland 7x 8.5-14mm

( ab le Gland 11x 5-12mm

Digital Selector Switch AlphaMiniCourse Gyro Compass

Documents

Transcript of Digital Selector Switch AlphaMiniCourse Gyro Compass