Airmar PB200 - Manual (Page 116)

PB200 WeatherStation User Manual revision 1.000
Proprietary and Confidential
110
_ NMEA 0183 RECEIVED SENTENCE _
$PAMTC,
ATTOFF
Summary
A set of proprietary commands to set and query the angular attitude offsets for the
PB200 WeatherStation.
Syntax
One of the following forms:
$PAMTC,ATTOFF,SET,<3>,<4>,<5>*hh<CR><LF>
$PAMTC,ATTOFF,Q*hh<CR><LF>
Fields
<3> Signed azimuth offset (yaw, or bow offset), degrees, to the
nearest tenth of a degree. The value must be between -180.0
and +180.0 degrees. Negative values indicate the forward mark
on the sensor housing is oriented toward the starboard side of
the vessel; positive values toward the port side.
<4> Signed pitch offset, degrees, to the nearest tenth of a degree.
The value must be between -45.0 and +45.0 degrees. Positive
values indicate the sensor is tilted forward toward the bow;
negative values indicate the sensor is tilted aftward.
<5> Signed roll offset, degrees, to the nearest tenth of a degree. The
value must be between -45.0 and +45.0 degrees. Positive
values indicate the sensor is tilted toward the port side; negative
values toward the starboard side.
Notes
The $PAMTC,ATTOFF set of commands perform the same function in the
PB200 as the transmitted proprietary NMEA 2000® PGN 126720-32. Note that
in the NMEA 0183 command, the arguments are in degrees, while in the NMEA
2000® PGN, the arguments are in radians. The values stored in the PB200 are in
radians. Therefore, when using the $PAMTC,ATTOFF command, there may be a
slight rounding error causing the values read back from the PB200 to be different
than the commanded values by one least significant digit.
The $PAMTC,ATTOFF,SET,<3>,<4>,<5> command is used to program the
PB200 WeatherStation with the attitude offset angles when the sensor is not
oriented parallel to the centerline, and perpendicular to the deck of the vessel.
The programmed values are stored in nonvolatile EEPROM memory within the