Jeppesen Nobeltec Solid State Heading Sensor, Руководство пользователя

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APPENDIX B – NMEA 2000 INTERFACING
Jeppesen Marine
35
12:
Nobeltec Command – set this field’s value to 0xF0, which will initiate a reset and start
the calibration process.
PGN 126208 – NMEA Command Group Function – Manufacturer’s Proprietary
Installation Offset.
This PGN performs the installation offset of the compass. It sets the roll and pitch outputs to
zero at the compass’ current orientation and sets the heading reading for the current
orientation to the value given by the PGN.
Field 1:
Complex Command Group Function Code (8 bits) – set this field’s value to 0x01,
which denotes a command PGN.
2:
Commanded PGN (24 bits) – set this field’s value to 126720 decimal (0x1EF00
hexadecimal), which denotes the Manufacturer’s proprietary PGN.
3:
Priority Setting (4 bits) – set this field’s value to 0x8, which indicates to leave priority
settings unchanged.
4:
Reserved (4 bits) – set this field’s value to 0xF, which is the value for a reserved field
of this size.
5:
Number of Pairs of Commanded Parameters to Follow (8 bits) – set this field’s value
to 0x4, indicating that four parameters will follow.
6:
Number of First Commanded Parameter (8 bits) – set this field’s value to 0x1
7:
Nobeltec Vendor ID and Industry Code (16 bits) – set this field to 0x9889, which is a
combination of Nobeltec’s vendor ID and the marine industry code.
8:
Number of Second Commanded Parameter (8 bits) – set this field’s value to 0x02
9:
Product Code (16 bits) – set this field’s value to 0x1B2, which is the NMEA 2000
product code for the SSHS.
10:
Number of Third Commanded Parameter (8 bits) – set this field’s value to 0x03
11:
Software Code (16 bits) – set this field’s value to 0x0001, which is the identifier for
this version of the Manufacturer’s proprietary protocol.
12:
Nobeltec Command (8 bits) – set this field’s value to 0x24, which will cause
installation-offset calibration to be performed.
13:
Heading Value (16 bits) – set this field’s value to the current known heading in
tenths of degrees (a value between 0 and 3599). For example, 121.7° would be
programmed as 1217 decimal, or 0x4C1 hexadecimal.