Fleet Management Interface
The fleet management interface ( FMS ; fleet management system ) is a standardized interface to some vehicle data for heavy commercial vehicles . The seven European manufacturers Daimler , MAN , Scania , Volvo , Renault Trucks , DAF Trucks and Iveco joined forces in 2002 to form the so-called FMS standard in order to enable cross-brand applications of traffic telematics .
The following data must be queried at the FM interface:
- Vehicle speed (measured on the wheel)
- Vehicle speed (sent from the speedometer)
- Clutch pedal depressed (yes / no)
- Brake pedal depressed (yes / no)
- Cruise control (on / off)
- Power take-off (status / mode)
- Position of the accelerator pedal (0-100%)
- Total consumption (liters since delivery)
- Fill level of the tank (0-100%)
- rotational speed
- Axle load (kg)
- Total operating hours (h)
- FMS standard version number (supported modes)
- Vehicle identification number
- Tachograph data
- Mileage
- Kilometers to the next customer service
- Cooling water temperature
Version 02.00 has been available since 2010 with the following additions:
- Ambient temperature
- Driver number (1,2)
- current fuel consumption
All data is sent from the vehicle in broadcast mode. The data are coded according to SAE J1939. Depending on the type, the transmission repetition rate of the data is between 20 ms (e.g. speed) and 10 seconds (e.g. vehicle identification number).
This enables manufacturer-independent telematics applications and evaluations of the data.
The amount of data sent can change depending on the vehicle manufacturer and type of vehicle. If some data is not available in the vehicle, a corresponding message is sent.
According to the vehicle manufacturer, the FMS standard is to be understood as the global standard for data from commercial vehicles. From the point of view of the vehicle manufacturer, a direct connection to the internal vehicle bus is prohibited and can invalidate the guarantee. Some vehicle manufacturers are now very restrictive in their service branches. All unknown connections to the internal vehicle bus are cut.
According to ACEA, around 350,000 vehicles were equipped with an FMS standard interface in 2010. The FMS standard was also the basis for the development of the Bus FMS standard for coaches and city buses in 2004.