ComNav Commander P2 & P2VS Installation & Operation Setting Up
Document PN 29010074 V4.1 - 94 -
•
If the autopilot could not find a compass that matches with the type you have
selected in step 2), it will display a “not found” error message at this point.
Note: some types can masquerade as others, so be sure you have selected the
correct type at step 2).
Check your installation to be sure that the compass is wired correctly. Fix any
problems, and re-start at step 2).
Contact your ComNav Dealer for help, if necessary.
4) Return to the Compass Configuration menu.
Digital Compass
The digital compass the P2/P2VS autopilot supports is the 45° Compass. If you don’t have a
45° Compass, leave Digital Compass to None, and move to the next line.
1) If you are not already in the Compass Configuration menu as seen in
Figure 67
, start it by
selecting “
Compass Setup
” with
Fn
button from the Dockside Setup menu (Dockside
Setup menu is seen in
Figure 66
).
2) Highlight “Digital Compass” and turn the knob to set the value to
Fixed
.
3) Press
Fn
and the autopilot starts to search for the compass.
You will not be able to move away from this line without press the
Fn
button if you have
changed the parameter from
None
to
Fixed
.
A “Please Wait” screen will be displayed briefly. Then, the results of the search will be
displayed, along with an option to “Compensate Now?”
4) Skip the compass compensation process (press the
Port
button), since this cannot be
done while still tied up at the dock.
5) Exit the Compass Configuration menu.
NAV 1 Port
NAV Ports are always available as a compass source and need not be installed. However, if
you have a Tri-Axis Rate Gyro Compass connected to NAV1 port, you can calibrate the
compass when your boat is on the water. See
Compass Setup – on the water
for setting up
Tri-Axis Rate Gyro Compass
on page 100.
NAV1 or NAV2 Port for general NMEA Compass
For other NMEA compasses – such as a Vector G2 or G2B GPS Compass – you should refer
to the setup & configuration instructions that are supplied with it.
Some points to keep in mind:
1) For proper performance of the autopilot, the update rate of the Heading sentences from
the NMEA compass must be ~10 Hz
22
.
Typically, you can set the sentence update rate in an NMEA compass using a generic
“terminal” program, or a product-specific “control” program, on a PC (e.g., HyperTerminal,
or Airmar’s WeatherCaster™).
Be sure to make that 10 Hz rate the “power-on default” rate.
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More than 10 Hz is not useful, but at much less than that the autopilot will not be able to maintain good control of the
vessel’s steering.
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