FMS - Fleet Management System

The Fleet Management Systems Interface (FMS) is a standard interface to vehicle data of commercial vehicles. The six European manufacturers Daimler AG, MAN AG, Scania, Volvo (including Renault), DAF Trucks and IVECO developed the so-called FMS-Standard in 2002 to make manufacturer-independent applications for telematics possible.

The following data are broadcast at the FMS interface:

Vehicle improvement (all round)

Vehicle speed (wheel based)

Vehicle speed (from tachograph)

Clutch switch (on/off)

Brake switch (on/off)

Cruise control (on/off)

PTO (Status/Mode)

Accelerator pedal position (0–100%)

Total fuel used (litres since lifetime)

Fuel level (0–100%)

Engine speed

Axle weight (kg)

Total engine hours (h)

FMS-Standard software version (supported modes)

Vehicle identification number (ASCII)

Tachograph information

High-resolution vehicle distance

Service distance

Engine coolant temperature

The data are coded according to SAE J1939. The repetition rate of the data is between 20 ms (e.g. engine speed) and 10 seconds (e.g. vehicle identification number).

With the FMS standard it is now possible to have manufacturer independent applications and evaluations of the data.

The amount of data is dependent on the manufacturer and model of the vehicle and might be different. If some data are not available at the interface they are marked as not available.

According to a note from the truck manufacturers, the FMS standard is seen as a worldwide standard. A direct connection to the internal vehicle bus system is not permitted by the truck manufacturers and could lead to the loss of warranty. Meanwhile, some manufacturers are quite restrictive in their workshops and cut all unknown connections to the internal bus system

Source: en.wikipedia.org/wiki/Fleet_Management_System