Appendix A – Nmea 2000 ® Interfacing - Maretron DST110 User Manual

Appendix A – NMEA 2000
DST110 NMEA 2000
PGN 128267 – Water Depth
The DST110 uses this PGN to indicate the water depth relative to the transducer and offset of
the measuring transducer.
Field 1: SID – The sequence identifier field is used to tie related PGNs together. For example,
the DST110 will transmit identical SIDs for Speed (PGN 128259) and Water depth
(128267) to indicate that the readings are linked together (i.e., the data from each PGN
was taken at the same time although reported at slightly different times).
2: Water Depth, Transducer – This field is used to report the depth relative to the
transducer in units of 1x10
3: Offset – If the value of this field is positive, it represents the difference in depth between
the transducer and the waterline of the vessel. If the value of this field is negative, it
represents the difference in depth between the transducer and the keel of the vessel.
The unit of measurement for this field is 1x10
4: Reserved – This field is reserved by NMEA; therefore, the DST110 sets all bits to a
logic 1.
PGN 128259 – Speed
The DST110 uses this PGN to indicate the vessel's speed through the water.
Field 1: SID – The sequence identifier field is used to tie related PGNs together. For example,
a compass would transmit identical SIDs for Water depth (128267) and Speed (PGN
128259) to indicate that the readings are linked together (i.e., the data from each PGN
was taken at the same time although reported at slightly different times).
2: Speed, Water Referenced – This field is used to report the vessel's speed relative to
the water in units of 1x10
3: Speed, Ground Referenced – This field is not used by the DST110; therefore, it
transmits a value of 0xFFFF (65,535) for this field (which represents "data not
available").
4: Reserved – This field is reserved by NMEA; therefore, the DST110 sets all bits to a
logic 1.
PGN 130310 – Environmental Parameters
The DST110 uses this PGN to indicate the water temperature.
Field 1: SID – The sequence identifier field is used to tie related PGNs together. For example,
the DST110 will transmit identical SIDs for 130310 (Environmental Parameters) and
130312 (Temperature) to indicate that the readings are linked together (i.e., the data
from each PGN was taken at the same time although they are reported at slightly
different times).
2: Water Temperature – This field indicates the water temperature in units of 1x10
3: Outside Ambient Air Temp – This field is not used by the DST110; therefore, it
transmits a value of 0xFFFF (65,535) for this field (which represents "data not
available").
Revision 1.3
®
Periodic Data Transmitted PGNs
-2
m.
-2
meters per second.
Appendix A – NMEA 2000
®
Interfacing
-3
m.
®
Interfacing
-2
°K.
Page A1