GF54.61-D-0002H Modular Tachograph (MTCO), Function

GF54.61-D-0002H Modular Tachograph (MTCO), Function

- with CODE (J19) Automatic 1 day/2 driver tachograph (EC)

The tachograph (A56) is a device required by law for recording the following data for a maximum of 2 drivers:
- Date
- Time
- Vehicle speed
- Distance
- Total odometer reading (km)
- Time groups
- Wheel times
- Other working hours
- Readiness times (waiting times, co-driver time, time in the bunk room while driving for driver 2)
- Break times and rest times

- Fault recording with fault code

Furthermore, the tachograph communicates with the speed sensor (B6/12).
From the speed sensor, the tachograph reads in a real-time signal (analog signal) and an encoded, digital signal for the transmission output shaft speed as well as the serial number of the speed sensor.
At the same time, the tachograph sends data and command signals to the speed sensor. The tachograph checks the serial number and the authenticity of the transmission speed by means of a causality check.

After evaluation of the input signals, the following data is shown on the tachograph display:
- Date
- Time
- Time group symbol, driver 1
- Tachograph disk, driver 1
- Total odometer reading (km)
- Fault symbol
- Tachograph disk symbol, driver 2
- Driver2 time group symbol
- Fault code

In addition, the following data is also recorded on the tachograph disk(s) for a maximum of 2 drivers:
- Vehicle speed
- Distance
- Time groups
- Wheel times
- Other working hours
- Readiness times (waiting times, co-driver time, time in the bunk room while driving for driver 2)
- Break times and rest times

The tachograph communicates with the instrument cluster (A1) via the Controller Area Network bus class C (engine compartment) (CAN-C). The instrument cluster sends, for example, the status of circuit 58d (for actuation of the switch and controls illumination) to the tachograph. The tachograph in turn sends its current status (e.g. time groups for driver 1) to the instrument cluster.

The tachograph performs self-diagnosis continuously. Faults or operating errors that occur are stored with a fault code in the tachograph and recorded on the tachograph disk(s) together with an entry relating to the fault that has occurred. The following faults are recorded:
- Voltage interruption
- Discontinuity of line connection to speed sensor
- Faults in tachograph

The tachograph can also be diagnosed via CAN-C. Diagnosis is performed via the EIS [EZS] control unit (N73) using the keyword event log.

Using the buttons integrated in the tachograph, driver 1 or driver 2 can operate the tachograph and make the following settings or queries:
- Insert or remove tachograph disk or tachograph disks
- Set time groups for driver 1 or driver 2
- Set time
- Display fault memory

The following settings or inquiries can also be made for the service area:
- Information, UTC, status
- Programming data
- Beginning and end of daylight saving time
- Speed pulse simulation (v-pulse simulation)