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Revision 1.0 Appendix A – NMEA 2000 Interfacing Page B3
engines are numbered starting from the port side and proceeding towards the
starboard side.
2: Rated Engine Speed – This field indicates the maximum rated rotational speed of the
engine in units of ¼ RPM.
3: VIN – This field indicates the Vehicle Identification Number of the engine as a textual
representation.
4: Software ID – This field indicates the version number or other identifying information
for the software in the engine as a textual representation.
PGN 127493 – Transmission Parameters, Dynamic
The J2K100 uses this PGN to transmit rapidly changing transmission data.
Field 1: Transmission Instance – This field indicates the particular transmission for which this
data applies. A single transmission will have an instance of 0. Transmissions in multi-
transmission boats will be numbered starting at 0 at the bow of the boat incrementing
to n going in towards the stern of the boat. For transmissions at the same distance
from the bow are stern, the transmissions are numbered starting from the port side
and proceeding towards the starboard side.
2: Transmission Gear – This field indicates the current gear the transmission is
operating in.
3: Reserved – This field is reserved by NMEA; therefore, the J2K100 sets all bits to a
logic 1.
4: Transmission Oil Pressure – This field indicates the oil pressure of the transmission
in units of 100 Pa.
5: Transmission Oil Temperature – This field indicates the oil temperature of the
transmission in units of 0.1°K.
6: Transmission Discrete Status – This field indicates warning conditions of the
transmission with the following bit assignments (value of 1 indicates warning
present):
Bit 0: Check Transmission
Bit 1: Over Temperature
Bit 2: Low Oil Pressure
Bit 3: Low Oil Level
Bit 4: Sail Drive
Bit 5-8: These bits are reserved and should be masked when read
7: Reserved – This field is reserved by NMEA; therefore, the J2K100 sets all bits to a
logic 1.
PGN 65030 – Generator Average Basic AC Quantities
The J2K100 uses this PGN to transmit data concerning the electrical output from a
genset.
Field 1: Generator Average Line-Line AC RMS Voltage – This field indicates the average line
to line voltage measured at the generator output in units of 1 Volt.
2: Generator Average Line-Neutral AC RMS Voltage – This field indicates the average
line to neutral voltage measured at the generator output in units of 1 Volt.