DESIGNER’S HANDBOOK 4189350049C EN
Page 44 of 206
4.7.8.3 SPEED
In this example speed data is needed to be able to calculate the true wind data.
The speed group is green, so everything is good.
If we open this group, we can see which port and sentence is used to provide data.
In this case, “Speed through water (STW)” instance 1 and “Speed over ground (SOG)” instance 1, are received
from input port 2.1, provided by talker VD, and sent in sentence VBW.
The XDi only needs one of the speed data to be able to calculate true wind. If STW is available, it will by default be
used. If not, SOG is used. Please note that the default selection can be changed via the installation menu.
4.7.8.4 WIND
This data group is yellow, so not all data is selected, or maybe manual setup is needed:
