B&G NMEA FFD User Manual

 Contents
Introduction
Why interface
What 1s NMEA
The NMEA display
System diagram
NMEA functions and FFD display
Tidal set and drift functions
Selecting compatible equipment
NMEA 0183 input sentence summary
10
NMEA 0183 output sentence summary
11
NMEA specification
NMEA 0183 input sentences recognised
NMEA 0183 sentences output
1%
12
27
Checksum
31
Further information
Installation 32
Connections 32
Adding the NMEA display to existing systems 32
Using multiple NMEA displays 33
Fault finding 34
Checking the NMEA display unit is working 34
Testing NMEA input and output 35
Error messages 36
Software version number 37
Specification 39
Physical39
40
Interfacing allows the user to access and network data, such as
navigational information, using an NMEA display connected to
your instrument system. For example your GPS may be at the
chart table, but you require its information to steer by on deck,
the FFDs could show that information if interfaced with the
GPS receiver.
The NMEA display can also provide network information to
other instruments; speed and heading to your Transit SatNav,
wind direction to your autopilot, heading to your Radar etc.
However, this only works if your instruments all understand
each other, which is where NMEA comes in.
What is NMEA
NMEA are the initials of an American trade association, the
National Marine Electronics Association, who have produced
a number of standard specifications for the interconnection of
marine electronic instruments.
These standards specify the electrical signals and the format of
data to be transferred, allowing devices like position fixers,
autopilots, chart plotters and radar produced by different
manufacturers to be interconnected.
The NMEA display unit is deigned to comply with the latest
and most comprehensive of the standards, the NMEA 0183
standard. There is one NMEA input and one output giving the
user the ability to connect a number of devices.
The NMEA display unit is a full function display (FFD) with
an integral NMEA interface. The unit connects directly to the
system network and has additional connections for NMEA
input and output. The unit can be used with the Hydra, HS 921
and Hercules 690 instrument systems and with the Hydra and
HS pilots. See system diagram.
Note: The NMEA display is essentially, identical in operation
and ability to any standard FFD.
N
Network to other units
eg, Processors & Display
(SET
NMEA input signal
NMEA input return J | er output
Screen NMEA gnd.
NMEA 0183 INPUT NMEA 0183 OUTPUT
LT LE rt a se de, aa CRF Hs en. eT eas i
Depending on the type of device connected to the NMEA
display, the following functions can be displayed by any FFD:
Bearing waypoint to waypoint,true
Bearing waypoint to waypoint,magnetic
Bearing to waypoint, true, thumb
Bearing to waypoint, magnetic, thumb
Bearing to waypoint, true, great circle
Bearing to waypoint, magnetic, great circle
Course to steer, magnetic, tidal corrected
Distance to waypoint,rhumb, NM
Distance to waypoint, great circle, NM
Distance to next waypoint, great circle, NM
Course over ground, true
Course over ground, magnetic
Speed over ground in knots
Velocity made good to waypoint in knots
Time to waypoint
Cross track error and sense
Tidal set, magnetic
Tidal drift, knots
Local time, hrs, mins, secs
Distance to layline, left or right
FUNCTION
(BRG W-W “T)
(ВЕС W-W °M)
(BTW RMB T)
(BTW RMB M)
(BTW GC T)
(BTW GC M)
(CTS °M)
(DTW RMB NM)
(DTW GC NM)
(NEXT WPT NM)
(CRSE O/G T)
(CRSE O/G M)
(SPD O/G KT)
(VMG WPT KT)
(ETA WPT HR)
(CROSS TR NM)
(TIDE SET °М)
(TIDE RTE KT)
(LOC TIME HR)
(LAYLINE)
MENU
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
WAYPOINT
NAVIGATE
NAVIGATE
TIME
PERFORM
Note: It may be necessary to wait a while after the NMEA device
has been switched on before the menus are complete.
EEE
EA IN NT ННЛН ОДЕТ ER ere a ar
NMEA functions can be displayed on an FFD in the same
manner as any other FFD function, see appropriate Hydra, HS
921 or Hercules 690 Owner Manuals.
The NMEA functions are to be found under the MENU, as shown
on page 6.
Only those functions that are received at the NMEA input will
appear in the display menu. These functions can be shown on
any of the FFDs or 20/20 CD displays.
Note: If after approximately one minute the required data is not
received for a selected function, the NMEA display and FFD
will display OFF to indicate there is no data.
Magnetic variation
Some position fixers only provide course over ground, true via
the NMEA as opposed to magnetic, since the NMEA display
also requires heading, magnetic from the instrument system, the
course over ground must be converted to magnetic for correct
tidal calculation.
Local magnetic variation 1s entered by selecting the
CALBRATE option on the TIDE SET function. The entered
value should be positive for West variation and negative for
East.
EEE IDO
When selecting equipment to interface with the NMEA
display it is most important to check that the equipment is
fully NMEA 0183 compatible and that the required data
can be transmitted and/or received by it.
The 0183 standard defines data sentences which are identified
by three letter mnemonics. The tables supplied on pages 10 and
11 list the sentences and their mnemonics that are input and
output by the NMEA display unit.
The NMEA specification section gives detailed information on
the data and format concerning the NMEA data stream
sentences.
Note: If you have any doubt about equipment compatibility then
please consult your local B&G distributor.
EE hh AOL
es
LAE ERR AH HH e AA e Arya Aa aaa aa aca fa a a ae aa py RH AA AT aaa ara memos
NMEA 0183 input sentence summa
Ne lata ANAIS a mE Bm E E EA TEE TT
AAA INTENTE
ae aa ae Pee arena rara tao
MNEMONIC
APA
APB
BEC
BER
BOD
BWC
BWR
BWW
GDP
GLL
GLP
RMA
RMB
RMC
AAA APN To A РЕ
Tin rra aer nene
AAA EA a Aa a A e Ae A eE,
DESCRIPTION
Autopilot format A
Autopilot format B
Bearing and distance to waypoint, great circle, dead reckoned
Bearing and distance to waypoint, rhumb, dead reckoned
Bearing to destination waypoint from origin waypoint, true
and magnetic
Bearing and distance to waypoint, great circle, measured
Bearing and distance to waypoint, rhumb, measured
Bearing waypoint to waypoint, true and magnetic
Latitude and longitude, present position dead reckoned
Latitude and longitude, present position
Latitude and longitude, present position, Loran C A
Recommended minimum implementation sentence, Loran C
specific
Recommended minimum implementation sentence, Generic
navigation information
Recommended minimum, implementation sentence, GPS,
transit specific
Actual track and ground speed
Waypoint closure velocity
Next waypoint distance, great circle
Next waypoint distance, thumb
Cross track error, measured
Cross track error, dead reckoned
Distance and time to layline
Local time zone
Time to waypoint
NEA Dies oulpubsentence SuMmaty de
on:
MNEMONIC DESCRIPTION
DBT Depth below transducer
GLL Latitude and longitude, present position
HDM Present heading, magnetic
MTA Air temperature, Celsius
MTW Water temperature, Celsius
MWD Surface wind direction and velocity
VHW Heading and water speed
VLW Log mileage, water referenced
VPW Velocity parallel to true wind, device measured
VWR Wind relative bearing and velocity
VWT Wind true bearing and velocity
ATE Measured cross track error
Note: Sentences are only output if data is available.
A tet eet Sete Tl oa CM ea ME Hae a LEST
ana aT ESS a aa a a Te Ta er
The following section gives details of the NMEA 0183 input
and output sentences recognised by the NMEA display unit.
The spaces between characters in the NMEA sentences are
included only to improve readability and do not form part of
the sentence.
Autopilot format A
$ as APA, A, A, x.xx, L, N, A, A, xXx, M, cccc *ss (CR) (LF)
checksum
destination wpt.
magnetic
bearing of dest. wpt. from original wpt.
arrival perpendicular
arrival circle
nautical miles
steer left (L) or right (R)
cross track error
cycle lock
signal validation (SEN 'OR'ed with blink for Loran C)
device identifier
Data extracted:
Cross track error
»
Autopilot format B
Saa APB, A, A,x.xx,L,N, A, A,xxx,M,cccc,xxx,m,xxx,m* ss(CR) (LF)
checksum
mag. (M) or true (T)
heading to steer to wpt.
mag. (M) or true (T)
bearing to wpt.
wpt. identifier
magnetic
bearing of dest. wpt from origin wpt.
arrival perpendicular
arrival circle
nautical miles
steer left (L) or right (R)
cross track error
cycle lock
signal validation (SRN ORed with blink for Loran C)
device identifier
Data extracted:
cross track error
bearing to waypoint true or magnetic
bearing waypoint to waypoint magnetic
course to steer, magnetic
Ee EE
et SE EEE EN i ed
ee EE ee eee cent nero EEE EEE a i tite
Bearing and distance to waypoint, great circle,
dead reckoned
$aaBEC,xxxxxX,XXXX.XX,1,XXXXX.XX, Ww, xxx, T,xxx,M,xxx.x,N,cccc*ss(CR) (LF)
checksum
wpt. ident.
nautical miles
distance to wpt.
magnetic
bearing to wpt.
true
bearing to wpt.
East (E) or West (W)
Longitude of wpt.
North (N) or South (S)
Latitude of wpt.
Universal coordinated time of bearing
device identifier
Data extracted:
Bearing to waypoint from dead reckoned position, great circle, magnetic.
Bearing to waypoint from dead reckoned position, great circle, true
Distance to waypoint from dead reckoned position, great circle.
Bearing and distance to waypoint, rhumb line,
dead reckoned
$aaBER, xXXxXX,XXXX.XX,n,XXXXX.XX,W,xxx,T,xxx,M,xxx.x,N,cccc*ss(CR) (LF)
checksum
wpt. ident.
nautical miles
distance to wpt
magnetic
bearing to wpt.
true
bearing to wpt.
East (E) or West (W)
Longitude of wpt.
North (N) or South (S)
Latitude of wpt.
Universal coordinated time of bearing
device identifier
Data extracted:
Bearing to waypoint from dead reckoned position, rhumb line, magnetic
Bearing to waypoint from dead reckoned position, rhumb line, true
Distance to waypoint from dead reckoned position, rhumb line
Bearing to destination waypoint from origin
waypoint, true or magnetic
$aaBOD, xxx, T, xxx, M, cccec, cceee *ss (CR) (LF)
|
checksum
dest. ident.
origin ident.
magnetic
magnetic brg.
true
true brg.
device indicator
Data extracted:
Bearing to destination from origin waypoint, true
Bearing to destination from origin waypoint, magnetic
Bearing and distance to waypoint, great circle,
measured
$aaBWC, XXX XXX, X XXX. XX, 1, XX XXX. XX, Ww, XxX, T,xxx,M,xxx.x,N,cccc*ss (CR) (LF)
checksum
wpt. ident.
nautical miles
distance to wpt
magnetic
bearing to waypoint
true
bearing to wpt.
East (E) or West (W)
Longitude of wpt.
North (N) or South (S)
Latitude of wpt.
Universal coordinated time of bearing
device identifier
Data extracted:
Bearing to waypoint from present position, great circle, magnetic
Bearing to waypoint from present position, great circle, true
Distance to waypoint from present position, great circle
Bearing and distance to waypoint, rhumb line,
measured
$aaBWR, xxx XXX, XXXX.XX,1,XXXXX.XX,W,xxX,T,xxx,M,xxx.x,N,cccc*ss (CR)(LF)
checksum
wpt. ident.
nautical miles
distance to wpt
magnetic
bearing to wpt.
true
bearing to wpt
East (E) or West (W)
Longitude of wpt.
North (N) or South (S)
Latitude of wpt.
Universal coordinated time of bearing
device identifier
Data extracted:
Bearing to waypoint from present position, rhumb line, magnetic
Bearing to waypoint from present position, thumb line, true
Distance to waypoint from present position, thumb line,
Bearing to waypoint from waypoint, true &
magnetic
$aaBWW, xxx, T, xxx, M, cccc, eccc*ss (CR) (LF)
checksum
from wpt ident.
to wpt ident.
magnetic
magnetic bearing
true
true bearing
device identifier
Bearing to waypoint from waypoint, true &
magnetic (continued)
Data extracted:
Bearing to waypoint from waypoint, true
Bearing to waypoint from waypoint, magnetic
Present position fix, dead reckoned
$aaGDP, xxxxxx, XXXX.XX, n, XXxXxx.xx, w, ccccc *ss (CR) (LF)
checksum
current wpt. ident.
East (E) or West (W)
longitude, W or E
North (N) or South (S)
latitude, N or S
UTC of fix
device indicator
Data extracted:
Latitude and longitude, present fix
Present position fix
$aaGLL, xxxx.xx, n, xxxxx.xx, w *ss (CR) (LF)
|
| checksum
East (E) or West (W)
longitude, E or W
North (N) or South (S)
latitude, N or S
device identifier
Data extracted:
Latitude and longitude, present fix
Present position fix, Loran-C
SaaGLP, хххххх, хххх.хх, п, ххххх.хх, w, ccccc*ss (CR) (LF)
checksum
current wpt ident.
East (E) or West (W)
longitude, E or W
North (N) or South (S)
latitude, N or S
UTC of fix
device identifier
Data extracted:
Latitude and longitude, present fix
Recommended minimum implementation
sentence, Loran-C specific
$aaRMA,a,XxXXX.XX,1, XX XXX. XX, W,XXXXX.X,XXXXX.X,XX.X,XXX,XX,e*ss (CR)(LF)
|
| checksum
East or West
variation
COG, true
SOG, knots
time differences for pair used in
position calculation
East (E) or West (W)
Longitude
North (N) or South (S)
Latitude
status, valid (A) or invalid (V)
device indentifier
Data extracted:
Course over ground (COG), true
Speed over ground (SOG), knots
Latitude & Longitude, present fix
Recommended minimum implementation
sentence, navigation information
$aaRMB,a,x.xx,l,ccce,ccec, XX XX. XX, N, XXX XXX. XX, W,XXX.X,XXX,XX.X,a¥*ss (CR) (LF)
|
checksum
arrival
vmg towards dest.wpt.
bearing to dest. wpt. true
distance to dest.wpt. great cirlce.
East (E) or West (W)
Longitude of dest. wpt.
North (N) or South (S)
Latitude of dest. wpt.
dest. wpt. identifier
origin wpt. identifier
direction to steer, left (L), right (R)
cross track error, N.Mi.
status, valid (A) or invalid (V)
device identifier
Data extracted:
Bearing to waypoint, great circle, true.
Distance to waypoint, great circle in nautical miles
Vmg to waypoint, knots
Cross track error, nautical miles
Recommended minimum implementation
sentence, GPS or Transit specific.
SaaRMC, XXXXXX, a, XXXX.XX,11,XXXXX.XX, W,XX.X, XXX, XXXXXX,XX,e*ss (CR) (LF)
checksum
East (E) or West (W)
variation
date
СОС, ние
SOG, knots
East (E) or West (W)
Longitude
North (N) or South (S)
Latitude
status, valid (A) or invalid (V)
universal coordinated time
device identifier
Data extracted:
Course over ground, true
Speed over ground, knots
Actual track and ground speed
SaaVTG, xxx, T, xxx, M, xx.x, N, xx.x, K Ч (CR) (LF)
checksum
km/hour
speed over ground
knots
speed over ground
magnetic
course over ground
true
course over ground
device identifier
Data extracted:
Course over ground, true
Course over ground, magnetic
Speed over ground, knots
Waypoint closure velocity
$aaWCV, xx.x, N, cccc *ss (CR) (LF)
|
| checksum
waypont identifier
knots
velocity made good towards waypoint
device identifier
Data extracted:
Velocity made good towards waypoint in knots
Distance to next waypoint, great circle
$aaWDC, xxx.x, N, cccc Na (CR) (LF)
checksum
waypoint identifier
nautical miles
distance to waypoint
device identifier
Data extracted:
Next waypoint distance, great circle
Distance to next waypoint, rhumb
$aaWDR, xxx.x, N, cccc T (CR) (LF)
checksum
waypoint identifier
nautical miles
distance to waypoint
device identifier
Data extracted:
Distance to waypoint, rhumb
Measured cross track error
SaaXTE, a, a, X.Xx, 1, N T (CR) (LF)
checksum
nautical miles
steer left (L) or right (R)
cross track error
cycle lock, valid (A) or invalid (V)
signal validation, valid (A) or invalid (V)
device identifier
Data extracted:
Cross track error in nautical miles
Dead reckoned cross track error
$aaXTR, a, a, x ‚хх, 1, № i (CR) (LF)
checksum
nautical miles
steer left (L) or right (R)
cross track error
cycle lock, valid (A) or invalid (V)
signal validation, valid (A) or invalid (V)
device identifier
Data extracted:
Cross track error in nautical miles
Time and distance to layline
$aaZDL, xxxxxx, x.xx, I, N " (CR) (LF)
checksum
nautical miles
steer left (L) or right (R)
distance to layline
time to layline
device indicator
Data extracted:
Distance to layline, nautical miles
Local time zone
$aaZl7Z, xxxxxx, XXxxxx, -xx *ss (CR) (LF)
|
checksum
zone number
local time
UTC
device indicator
Data extracted:
Local time, HRS, MINS, SECS
Time to waypoint
$aaZ TG, XXXXXX, XXXXXX, CCCC Ka (CR) (LF)
checksum
waypoint identifier
time to waypoint
universal coordinated time
device identifier
Data extracted:
Time to waypoint
AAA TOO CAS ет:
NMEA 0183 sentences output
Depth of water below transducer
SIIDBT,xxx.x,f,xxx.x,M,xxx.x,F*ss (CR) (LF)
|
checksum
fathoms
depth in fathoms
metres
depth in metres
feet
depth in feet
device identifier for integrated instrumentation
Note: If the depth sounder is unable to determine the depth and therefore
displaying then the sentence will be transmitted with null data fields.
Latitude and longitude, present fix
$ IIGLL, XXXX.XX, N, XXXXX.XX, W *ss (CR) (LF)
|
| | checksum
East (E) or West (W)
longitude, W or E
North (N) or South (S)
latitude, N or S
device identifier
Magnetic heading
$ITHDM, xxx,M*ss (CR) (LF)
|
checksum
magnetic
magnetic heading
device indicator
Air temperature
ai a ma: (LF)
checksum
Celsius
air temperature in degrees Celsius
device indicator
Water temperature
SIMTW xxx,C* i (CR) (LF)
checksum
Celsius
water temperature in degrees Celsius
device indicator
Surface wind direction and velocity
$IIMWD,,,xxx,M, xx.x, N, xx.x, M, es (CR) (LF)
checksum
m/s
true wind speed in m/s
knots
true wind speed in m/s
magnetic
true wind direction
device indicator
TA NN CC nn aT NA [A me a ea iia ae eN Ein a TE mm Le a a a ae babe ea aaa ta hr mn me trono a a tan none es Bray ire a er
Dé ee ee eee ee Le es Re EE EE CE SE
7
Heading and water speed
SIIVHW,,,xxx,M,xx.xx,N,,*ss (CR) (LF)
checksum
knots
boatspeed in knots
magnetic
magnetic heading
device identifier
Water referenced log mileage
SIIVLW,xxxx.xx,N,xxxx.xx,N*ss (CR) (LF)
checksum
nautical miles
distance since reset and started
nautical miles
total cumulative distance
device identifier
Device measured velocity parallel to true wind
SIIVPW,xxx.x,N,,*ss (CR) (LF)
checksum
knots
Vmg upwind (positive) or downwind (negative)
device identifier
Wind relative bearing and velocity
SIIVWR ,xxx,a,xx.x,N,xx.x,M,,*ss (CR) (LF)
checksum
metres/second
apparent wind speed in m/s
knots
apparent wind speed in knots
from port (L) or from starboard (R)
apparent wind angle, 0 to 180 degrees
device indicator
True wind relative bearing and velocity
A Trap (CR) (LF)
checksum
metres/second
true wind speed in m/s
knots
true wind speed in knots
from port (L) or from starboard (R)
true wind angle, 0 to 180 degrees
device indicator
Measured cross track error
$IIXTE, a, a, x.xx, 1, he (CR) (LF)
checksum
nautical miles
steer left (L) or right (R)
cross track error
cycle lock, valid (A) or invalid (V)
signal validation, valid (A) or invalid (V)
device identifier
TAREA ee ae TT Lr re eT e en mea
Checksum
EE CCC LEE EE a a a ela
The checksum is a two character hexadecimal value calculated
by exclusive ORing each data character in the sentence between
the $ and the *. This is used by the interface unit to check for
errors in received data. If an error is found then Err 4 will be
displayed. See Fault finding.
The checksum is optional except in sentences RMA, RMB and
RMC.
Note: In some earlier implementations of the 0183 standard an
extra comma is transmitted before the *, this will not cause an
error message.
Further information
ALELLA ALLE AAA Se 8 8S 8 eb AAA AAA AAA AA Ae as
Further information on the NMEA and copies of the 0183
standard can be obtained from:
National Marine Electronics Association
49 Delwood Lane
Tinton Falls
NJ07724
USA
AAA AAA ee AAA AAA AAA NAAA BE AE ALA ELLE, E, TU Ni AE, y y; y yy, y y AMENA EA aaa
viula tp hate Te Ta
Connections
See Installation Sheet 330-IS-0460.
Adding the NMEA display to existing systems
The NMEA display is connected to the system using the
network in the same manner as a normal FFD, see installation
sheet supplied.
Note: The software used in the existing FFDs should be version
3B or later. If unsure see Fault finding - software version
number.
Multiple NMEA display units can be installed when for
instance, a second position fixer is required, this can be
interfaced to the existing system by simply adding the
additional display to the network.
Additional NMEA display units will generate further sets of
NMEA functions depending of course on the information
received from the position fixers. For example, if cross track
error is being received by multiple NMEA display units then
cross track error will appear twice in the WAYPOINT menu on
all FFDs as CROSS TR NM and CROSS TR 1, see note.
By referring to the displayed value of cross track on each of the
position fixers, and relating it to the value shown on the FFD,
it is possible to see which displayed text relates to which
position fixer. Once this is established, this relation- ship will
not change even when the system is switched off.
Note: That all other duplicated display functions with the suffix
I relate to the same position fixer. If a third NMEA display is
used, then the suffix 2 appears and so on.
i nh
The major problem when trying to trace faults in an interfaced
system is identifying which device or interconnection 1s at
fault. For example, it is easy to assume that the problem lies
in the NMEA display, when a particular function cannot be
selected, where in reality the position fixer may not been
configured properly to output NMEA.
Note: The NMEA display unit contains a number of diagnostic
routines to help.
Checking the NMEA display unit is working
If interfaced correctly with a suitable position fixer for
example, the NMEA display will show the NMEA legend if it is
receiving correct NMEA data from the position fixer.
If the position fixer is not functioning correctly, the NMEA
legend will not appear. Should this occur, check the following:
1 All connections to the NMEA input and output are good. See
Installation - connections for further information.
2 The position fixer is configured correctly for NMEA 0183
output.
AREA EEA ER REE hE BE ES ERR EER RE ESR RE RSE RS ee ee ede eR me hd RE hE hE EE RGR S ER GEL LEE LEE RA EEE EE EEE ELE AE Ea EEE Ed EEE EERE BE ESE ES ES dd ES
If these two points check out correctly, then there may be a fault
with the interface in the NMEA display or with the position
fixer. |
The NMEA display has a comprehensive self test facility which
will give the user an immediate indication of possible failure.
Testing NMEA inputand output —
The NMEA display input and output may be tested as follows:
1 Ensure the instrument system is switched OFF.
2 Locate the main NMEA display junction box and do the
following:
Remove yellow and violet wires from display and connect them
together (ie, NMEA O/P to NMEA 1/P signal).
Remove blue wire from display, and connect to black (ie,
connect NMEA I/P return to ground).
3 Switch on the system whilst holding the (=) key down on
the NMEA display, the DIAGNOST menu will appear.
4 Press the(= key, KEYTEST appears, now press and hold the
(A key until NMEA appears, now press the key to
initiate the NMEA [/P, O/P test.
ALA EE EEE EEE EEE EE EE EE EE EE EEE EEE QE EE
a attra a ET EE ich bot? gy MoH, fem BB PM CMe ee ACM
Rr Er Ee am a nT Ta a a tn am a Fa Ma TA Tae ea ee en a a ra Ta
sD ee
EE a rm aR AE AAA A A AAA wm ATA AA a a ep ee ne eee Te Mah Ata ae area acera Et Telar te a in aa
5 The following messages may appear:
RX TX OK - NMEA input and output are functioning correctly.
FAIL - Internal open circuit in the interface hardware.
Corrupted or nonsensical text appears - Internal component
failure in the interface hardware.
EA ALEA AE A AAA nn ta a DE
Ce aaa ne nero re ne io eee a mt are o ar noe ona een pen A NO
EE aa TEA e EE rae nee au aa en eee AA AA ae mE али а ele нова ал, amare arama Te a ars
There are three messages that can be displayed when using an
NMEA function to indicate an interface input error, these are:
a a Cr aa a hd Ha mm mn aan Te Th a tn Ta Te E A tt ee ame te a ata a Ta MME EE Ee ae La Cee ae a ae
If either Err 3 or Err 4 is displayed you should check for
interference or more likely the compatibility of the equipment.
If the OFF legend is displayed, then a check should be made on
the set-up of the interfaced equipment or the connecting
cable(s).
If the NMEA legend disappears, reception of NMEA data has
ceased. Check NMEA connecting cables and the set-up of the
interfaced equipment.
Software version number
It is important when liaising with a B&G service agent that you
know the software version number of your NMEA display unit.
This can be identified using the display’s diagnostic feature, as
follows:
1 With the power OFF, press and hold the (= key and switch
on the system. The upper menu text shows DIAGNOST.
2 Press the (= key again to enter the diagnostics main menu, -
the text will indicate the first option KEYTEST.
3 Press and hold the (NS) key until VERSIONS appears, then
press the (= key to enter the versions menu.
4 DISPLAY is shown flashing, then press the(=) key to reveal Y
software version number. When the test is completed the
PROM checksum is displayed on the display's lower digits.
The last two digits displayed represent the software version
number.
5 Toreturn the display to normal operation, press the key.
Physical
Construction -
Fully sealed, moulded, ABS chassis plate with metal rear
can
NMEA Display unit -
Size: 165mm x 110mm x 30mm
Weight: 0.5 Kg
Temperature range -
Operating: -10°C to 60°C
Storage: -25°C to 80°C
Humidity range -
0 to 100%
Shock/bump vibration -
Def Stan 07-55 Pt 2 Section 1/1. Test A5 & A3;
BS 2011 Pt 2, Test F Procedure B3
Electrical
Power supply -
Voltage: 12V nominal (10V to 16V)
Current: 25mA maximum without lighting
90mA maximum with lighting
Processor and memory -
CMOS 8 bit microprocessor 64K x 8 EPROM,
8K x 8 RAM, 256 x 8 EEPROM
Data retention -
Settings retained by EEPROM (10 years retention)
Interface standards -
NMEA 0183 version 1.5
Baud rate -
NMEA 0183 - 4800 bits per second
NMEA output drive -
15mA at 4V
NMEA input drive requirement -
TmA at 4V
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