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FFM100 User’s Manual
Page A2 Appendix A – NMEA 2000
®
Interfacing Revision 1.2
6: Fuel Rate – (16-bit signed integer) This field indicates the fuel consumption rate of
the engine in units of 0.0001 cubic meters / hour.
7: Total Engine Hours – (32-bit unsigned integer) The FFM100 sets this field to a
reserved NMEA 2000 value indicating “Data Not Available”.
8: Engine Coolant Pressure – (16-bit unsigned integer) The FFM100 sets this field to a
reserved NMEA 2000 value indicating “Data Not Available”.
9: Fuel Pressure – (16-bit unsigned integer) The FFM100 sets this field to a reserved
NMEA 2000 value indicating “Data Not Available”.
10: Reserved – (8 bits) The FFM100 sets all bits in this field to a value of “1”.
11: Engine Discrete Status 1 – (16 bits) The FFM100 sets all bits in this field to a value of
“0”.
12: Engine Discrete Status 2 – (16 bits) The FFM100 sets all bits in this field to a value of
“0”.
13: Percent Engine Load – (8-bit signed integer) The FFM100 sets this field to a reserved
NMEA 2000 value indicating “Data Not Available”.
14: Percent Engine Torque – (8-bit signed integer) The FFM100 sets this field to a
reserved NMEA 2000 value indicating “Data Not Available”.
PGN 127497 – Trip Parameters, Engine
The FFM100 uses this PGN to transmit more slowly changing engine data. The factory default
for periodic transmission rate is once per second. The transmission of this PGN can be
disabled (see PGN 126208 – NMEA Request Group Function – Transmission Periodic Rate).
Field 1: Engine Instance – (8-bit unsigned integer) This field indicates the particular engine
for which this data applies. A single engine will have an instance of 0. Engines in
multi-engine 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 engines at the same distance from the
bow are stern, the engines are numbered starting from the port side and proceeding
towards the starboard side.
Field 2: Trip Fuel Used – (16-bit unsigned integer) This field indicates the total fuel used since
the counter was last reset with a resolution of 0.001 cubic meters.
Field 3: Fuel Rate, Average – (16-bit signed integer) The FFM100 sets this field to a reserved
NMEA 2000 value indicating “Data Not Available”.
Field 4: Fuel Rate, Economy – (16-bit signed integer) This field indicates the current fuel
consumption rate with a resolution of 0.0001 cubic meters / hour.
Field 5: Instantaneous Fuel Economy – (16 bit signed integer) This field indicates the current
fuel consumption rate with a resolution of 0.0001 cubic meters / hour.