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VI. Display Engine and Transmission Status (Warnings)
The standard NMEA 2000 defines 24 warnings for engine status and 5 for transmission status that
are listed in Appendix B. The NMEA 2000 displays and chart plotters can support display of the engine
status in different varying degrees.
1. Volvo Penta D1 and D2 engines
The low-power engines for sailing yachts, Volvo Penta series D1 and D2, are equipped with electronic
control block MDI (Mechanical Diesel Interface) and have a few sensors connected to the MDI which report
on a small number of problems: engine overheating, low oil pressure, and low ignition battery voltage.
The MDI block, unlike electronic blocks of other engines, provides data about the condition
with a proprietary message. To process these messages, the parameter MDI_PROP_MESSAGE
must be set to ON (see V.7).
Table 1. Display of engine status for D1 and D2 engines in NMEA 2000
Symbol Description Status in NMEA 2000 [bit]
Pre-heating. Preheat Indicator [11].
Starting. Turning on the starter Not displayed, no corresponding status.
Stopping.
Engine stopping Engine Shutting Down [24].
Fuel level. Fuel level less than 20%
(if sensor is installed).
Not displayed, no corresponding status.