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Workshop Manual
Smart Tachograph EFAS-4.10/4.11
13.3.2 Speed-coding output D6
For output D6, it can be selected whether the speed coded is calculated via the calibration parameter w/k (“B6/B7 identical”)
or via an independent k (D6) factor (“pulse factor”). Using an inspection unit or EFAS Service Tool, it is possible to set the speed
received by the ECU connected at D6 to correspond to the speed displayed and recorded at EFAS.
The factor k (D6) has the same dimension as the calibration factor, but is independent of it and is not determined during the
calibration of the EFAS, but must be determined independently and separately.
Output D6 requires a resistor (approx. 10 kOhm) against operating voltage in order to work properly, but this is usually installed
in one of the connected control units in the vehicle.
Alternatively, this output can also be congured for the signaling of other states, in particular to:
y Deactivated, “low”
y Deactivated “high”
y B6/B7-identical
y Pulse Factor
y Overspeed
y Overspeed PreWarning
The selection is made with a suitable inspection device or with the EFAS Service Tool.
13.3.3 Distance encoding output B8
At its output B8, EFAS encodes the distance travelled by providing one pulse per 0.25 m of distance travelled, so this output is
also referred to as a “4 pulse/m” output.
No conguration options are oered for this output.
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