Maretron GPS200 - Manual (Page 22)

GPS200 User’s Manual
Page A6 Appendix A – NMEA 2000
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Interfacing Revision 1.2
This will change the configuration of the GPS200.
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 129538, which denotes the
GNSS Control Status 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 the number of configurations to be changed.
6: Field number of first commanded parameter (8 bits). Please refer to the table below
for valid values for this field.
7: Value of first command parameter (size depends on the field number specified in
field 6 of this PGN) – please refer to the description of PGN 129538 above for
details.
Field
Number of
Commanded
Parameter
Name of Commanded
Parameter
Size
(Bytes)
5
6 GNSS Mode
DGNSS Mode 1
1
Fields 6 and 7 are repeated pair wise until all parameters to be modified have been specified.
PGN 126208 – NMEA Command Group Function – Maretron Proprietary Restart GPS
Engine
This will force the GPS200 to restart its GPS engine without performing a full reset of the unit.
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, which denotes the
Maretron 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: Maretron Vendor ID and Industry Code (16 bits) – set this field’s value to 0x9889
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 0x6F0, which is the NMEA 2000
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product code for the GPS200.
10: Number of Third Commanded Parameter (8 bits) – set this field’s value to 0x03