All information regarding the B and G H2000 sailing system, with the Hydra and Hercules (performance) processor.
Check out the dedicated H2000 info, use the menu to navigate to the B&G section with more information. Polar Speed, VMG on the displays
NMEA FFD should be at least version 9 to accept Polar Target Speed information from an NMEA source.
$PBGTTBS - Polar Speed knots, Polar performance %
$PBGTLAY - Distance to Layline (Nm), Time to Layline (hhmmss) $PBGTVMG - VMG upwind angle AWA (polar), upwind heading for best VMG (polar), downwind heading for best VMG (polar) $PBGTSTR - Distance to Start Line (metres), Time to Start Line (hhmmss) $PBGTTBS,x.x,N,y.y* hh
(appears in PERFORM - POL menu)
$PBGTLAY,x.x,N,hhmmss*hh
(appears in PERFORM - LAYLINE menu)
$PBGTVMG,x.x,y.y,y.y, M,z.z,z.z,M*hh
(appears in WIND - AWA and NAVIGATE - TARG)
$PBGTSTR,x.x,M,hhmmss,X *hh
(appears in WAYPOINT menu)
Fastnet Bus specifications
(Thanks to Tom Lafleur for all the information)
The bus is on a 28k8 speed, with odd parity and 2 stopbits
Green and White are the data lines, together with a 12V and a Ground signal.
Complete layout of a Serial TTL to Fastnet schematic(thanks to Tom for all the work)
Flash/updates firmware
Several devices should be available, like USB cables to newest H2000/H3000,Fastnet Field Programmer and B&G Update Utility (only available for dealers?)
Not sure if this is possible, most H2000 have an EPROM, not flash (highest flash version 1.03).
The Eprom is a 27C512 (27C256 for depth), UV eraseable, hd63c03 is the processor on the PCB, a 6502 variant processor.
Known software versions, most of the firmware changes in the FFD were to add new text and options to the display.
FFD: 9.0 (previous versions include 8.4, 8.3, 8.1, supports above polar info through NMEA)
Wind: 9.3 (previous versions 9.1, 7.5)
Depth: 9.3 (previous version 7.6)
Performance: 7.7 ??? (previous versions: 7.5, 7.2)
Changing the Hydra/Hercules wind and depth eprom
This is not so hard, remove the cover from the connectors, remove the 4 screws that hold the top cover.
Now you see the bottom of the Wind board, there are 4 white plastic washers, remove them from the 4 holders. slowly remove the depth board from these 4 holders, and flip it on the side with the flexible connector. This should be enough to change the EPROM, and access the battery (type BR2325), check this picture.
For the Depth board, slowly move the depth board up (it also has a flexible connector) the 4 holders will come loose of the bottom of the housing. Replace the EPROM and assemble in the reverse order.
The performance unit only has 1 board, also with an EPROM, removal is the same.
Changing the FFD EPROM
When you take an FFD or 20/20 apart, be careful when removing the snap ring on the frame...its easy to break it.,Then undue the screw on the connector to allow air in, then use a pair of dull knife blade to separate the frame with its rubber seal from the can.. its tight... also its very easy to snap off the mounting ears. Be careful of the orientation of the connector in the unit... you can re-connected it backwards... Carefully remove the EPROM and replace it with the new one, be sure to insert in the same orientation (little notch to the center of the board, see this picture) when you reassemble, I use a very small amount of o-ring grease on the gasket and I bake the desiccant crystals bag in the unit at 150deg F for 1-2 hr in my oven to re-activate it. its also a good time to change the memory keep-alive batteries in the units, I do it with power on to keep the memory safe. (Thanks to Tom) Linear inputs
There are 4 linear inputs, number 1 and 2 used for heel and trim, all 4 accept 0 - 6.5 volt (0-1000) with 3.25 volt being 500.
When calibrating an input (including heel, the max value (1000) is lowered, and so the center also changes (eg max 800, new center 400)
Analogue wind meter not working
We had this problem, our analogue Apparent Wind Angle meter was broken, it only pointed up (around 0 degrees) or down (180 degrees). The meter connections at the mast were corroded and full with seawater.
we checked with a spare AWA meter, setting the output on the H2000 to a different analogue port (1-4) and checked all the cables. Nothing helped.
Finally figured out that the Hydra was not giving the correct values, and it turned out to be the fuse ON the Hydra board.
See the procedure for changing the hydra wind eprom for the picture with the fuse.
Calibration and Background info
Fastnet Channel information
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