What does the DT Record?

The digital tachograph records the following features:

  • Insertions and Withdrawals of Tachograph Cards
  • Speed: Detailed Speed & Over Speeding
  • Distances
  • Time
  • Malfunctioning
  • Vehicle Unit Identification Data
  • Motion Sensor Identification Data
  • Calibration Data
  • Company Locks Data & Management
  • Control Activity Data
  • Download Activity Data
  • Drivers’ Activities: Recorded in Real Time & Recorded through Manual Entries
  • Entry of Specific Conditions
  • Warnings
Insertions and Withdrawals of Tachograph Cards

Upon card insertion the recording equipment detects whether the card inserted is a valid tachograph card and in such a case identifies the card type. The recording equipment is designed so that the tachograph cards are locked in position on their proper insertion into the card interface devices.

The withdrawal of tachograph cards functions only when the vehicle is stopped and after the relevant data have been stored on the cards. The withdrawal of the card requires positive action by the user.

For each insertion and withdrawal cycle of a driver or workshop card in the equipment, the recording equipment records and stores in its data memory:

  • The card holder’s surname and first name(s) as stored in the card,
  • The card’s number, issuing Member State and expiry date as stored in the card,
  • The insertion date and time,
  • The vehicle odometer value at card insertion,
  • The slot in which the card is inserted,
  • The withdrawal date and time,
  • The vehicle odometer value at card withdrawal,
  • The following information about the previous vehicle used by the driver, as stored in the card: VRN and registering Member State, and Card withdrawal date and time,
  • A flag indicating whether, at card insertion, the card holder has manually entered activities or not.
Speed

The digital tachograph continuously measures and is able to provide the speed of the vehicle. The speed measurement also provides information whether the vehicle is moving or stopped. The vehicle is considered as moving as soon as the function detects more than 1imp/sec for at least five seconds from the motion sensor, otherwise the vehicle is considered as stopped. Therefore, would the vehicle be driven without the driver having inserted his card, driving time and speed would nevertheless be recorded.

The recording equipment measures speed from 0 to 220km/h. To ensure a maximum tolerance on speed displayed of +/- 6km/h in use, and taking into account:

  • A +/- 2km/h tolerance for input variations (tyre variations, …),
  • A +/- 1km/h tolerance in measurements made during installation or periodic inspections;

the recording equipment measures, for speeds between 20 and 180km/h, and for characteristic coefficients of the vehicle between 4.000 and 25.000imp/km, the speed with a tolerance of +/- 1km/h (at constant speed). Speed measurement therefore has a resolution better than or equal to 1km/h.

Detailed Speed 

The recording equipment records and stores in its data memory the instantaneous speed of the vehicle and the corresponding date and time at every second of at least the last 24 hours that the vehicle has been moving.

Over Speeding 

Data recorded in case of over speeding are date and time of beginning as well as end of the event, maximum speed measured during the event, arithmetic average speed measured during the event, card’s type, number and issuing Member State of the driver (if applicable), and number of similar events that day.

Data on over speeding are kept in memory according to predefined storage rules. The most serious event for each of the last 10 days of occurrence, the five most serious events over the last 365 days and the first event having occurred after the last calibration are stored in data memory.

The recording equipment also records and stores in its data memory:

  • The date and time of the last over speeding control,
  • The date and time of the first over speeding following this over speeding control,
  • The number of over speeding events since the last over speeding control.
Distances

The recording equipment measures distance from 0 to 9 999 999,9km.

Distance measured is within the following tolerances (distances of at least 1.000m):

  • +/- 1% before installation,
  • +/- 2 % on installation and periodic inspection, and
  • +/- 4 % in use.

Distance measured has a resolution better than or equal to 0,1km.

The recording equipment records in its data memory the vehicle odometer value and the corresponding date at midnight every calendar day. The data memory stores midnight odometer values for at least 365 calendar days.

Time

The time measurement function permanently measures and digitally provides UTC (Universal Time Co-ordinated) date and time. UTC date and time is used for dating throughout the recording equipment (recordings, printouts, data exchange, display, etc.).

Time drift is within +/- 2 seconds per day in type approval conditions. Time measured then has a resolution better than or equal to 1 second. Time measurement should not be affected by an external power supply cut-off of less than 12 months in type approval conditions. 

The recording equipment records and stores in its data memory data relevant to the most recent time adjustment, and the five largest time adjustment since last calibration, performed in calibration mode outside the frame of a regular calibration.

The following data shall be recorded for each of these time adjustments:

  • Date and time, old value,
  • Date and time, new value,
  • Workshop name and address,
  • Workshop card number, card issuing Member State and card expiry date.
Malfunctioning 

In case of malfunctioning, the recording equipment detects the following events and/or faults:

  • Insertion of a non valid card” event is triggered at the insertion of any non-valid card and/or when an inserted valid card expires.
  • Card conflict” event is triggered when any of the valid cards combination noted X in the table arises:
  • “Time overlap” event is triggered when the date/time of last withdrawal of a driver card, as read from the card, is later than the current date/time of the recording equipment in which the card is inserted. 
  • “Driving without an appropriate card” event is triggered for any tachograph cards combination noted X in the following table, when driver activity changes to DRIVING, or when there is a change of the mode of operation while driver activity is DRIVING.• “Card insertion while driving” event is triggered when a tachograph card is inserted in any slot, while driver activity is DRIVING. 
  • “Last card session not correctly closed” event is triggered when at card insertion the recording equipment detects that the previous card session has not been correctly closed, that the card has been withdrawn before all relevant data have been stored on the card. This event can be triggered by driver and workshop cards only. 
  • “Over speeding” event is triggered for each over speeding. 
  • “Power supply interruption” event is triggered, while not in calibration mode, in case of any interruption exceeding 200 milliseconds of the power supply of the motion sensor and/or of the vehicle unit. The interruption threshold is defined by the manufacturer. The drop in power supply due to the starting of the engine of the vehicle does not trigger this event. 
  • “Motion data error” event is triggered in case of interruption of the normal data flow between the motion sensor and the vehicle unit and/or in case of data integrity or data authentication error during data exchange between the motion sensor and the vehicle unit. 
  • “Security breach attempt” event is triggered for any other event affecting the security of the motion sensor and/or of the vehicle unit as specified within the generic security targets of these components, while not in calibration mode. 
  • “Card” fault is triggered when a tachograph card failure occurs during operation. 
  • “Recording equipment” fault is triggered for any of these failures, while not in calibration mode: VU internal fault, printer fault, display fault, downloading fault, and/or sensor fault.
Vehicle Unit Identification Data

The recording equipment stores in its data memory the following Vehicle Unit Identification Data:

  • Name of the manufacturer
  • Address of the manufacturer
  • Part number
  • Serial number
  • Software version number
  • Software version installation date
  • Year of equipment manufacture
  • Approval number

Vehicle unit identification data are recorded and stored once and for all by the vehicle unit manufacturer, except the software-related data and the approval number which may be changed in case of software upgrade.

Motion Sensor Identification Data

The motion sensor stores in its memory the following Motion Sensor Identification Data:

  • Name of the manufacturer,
  • Part number,
  • Serial number,
  • Approval number,
  • Embedded security component identifier (e.g. internal chip/processor part number),
  • Operating system identifier (e.g. software version number).

Motion sensor identification data are recorded and stored once and for all in the motion sensor, by the motion sensor manufacturer. The vehicle unit records and stores in its data memory the following currently paired motion sensor identification data:

  • Serial number,
  • Approval number,
  • First pairing date.
Calibration Data

The calibration of the recording equipment can only be performed when a workshop card is inserted in the equipment. The recording equipment must keep in its memory the set of vehicle parameters entered during its first calibration within this vehicle (as denoted by the VIN – Vehicle Identification Number) and during the last five calibrations. The workshop identification and date of the calibration are also memorised.

REMARK:If several calibrations happen within one calendar day, only the last one of the day is memorised.

The workshop card has the capability to record the calibration activity performed with this card. These records are organised as follows: recording of 88 records minimum and then replacement of the oldest data by new data.

The recording equipment records and stores in its data memory data relevant to:

  • Known calibration parameters at the moment of activation,
  • Its very first calibration following its activation,
  • Its first calibration in the current vehicle ( as identified by its VIN),
  • The five most recent calibrations (if several calibrations happen within one calendar day, only the last one of the day is stored).

The following data are recorded for each of these calibrations:

  • Purpose of calibration (activation, first installation, installation, periodic inspection),
  • Workshop name and address,
  • Workshop card number, card issuing Member State and card expiry date,
  • Vehicle identification,
  • Parameters updated or confirmed: w, k, l, tyre size, speed limiting device setting, odometer (old and new values), date and time (old and new values).
Company Locks Data

This function allows the management of the locks placed by a company to restrict data access in company mode to itself. Company locks consist in a start date/time (lock-in) and an end date/time (lock-out) associated with the identification of the company as denoted by the company card number (at lock-in). Locks may be turned “in” or “out” in real time only. Locking-out is only possible for the company whose lock is “in” (as identified by the first 13 digits of the company card number), or locking-out is automatic if another company locks in.

In the case where a company locks in and where the previous lock was for the same company, then it will be assumed that the previous lock has not been turned “out” and is still “in”.

The recording equipment records and stores in its data memory the following data relevant to the 20 most recent company locks:

  • Lock-in date and time,
  • Lock-out date and time,
  • Company card number and card issuing Member State,
  • Company name and address.
Company Locks Management

The recording equipment records in its data memory the following data relevant to specific conditions:

  • Date and time of the entry,
  • Type of specific condition.

The data memory is able to hold specific conditions data for at least 365 days (with the assumption that on average, one condition is opened and closed per day). When storage capacity is exhausted, new data shall replace oldest data.

Control Activity Data

This function monitors DISPLAYING, PRINTING, VU and card DOWNLOADING activities carried while in control mode. This function also monitors OVER SPEEDING CONTROL activities while in control mode. An over speeding control is deemed to have happened when, in control mode, the “over speeding” printout has been sent to the printer or to the display, or when “events and faults” data have been downloaded from the VU data memory.
In case of downloading, the dates of the oldest and of the most recent days downloaded are also recorded.

Download Activity Data

The recording equipment records and stores in its data memory the following data relevant to the last data memory downloading to external media while in company or in calibration mode:

  • Date and time of downloading,
  • Company or workshop card number and card issuing Member State,
  • Company or workshop name.
Driver’s Activities

1. Recorded in Real Time

Driver activity is DRIVING, WORK, AVAILABILITY, or BREAK/REST. It is possible for the driver and/or the co-driver to manually select WORK, AVAILABILITY, or BREAK/REST. When the vehicle is moving, DRIVING is selected automatically for the driver and AVAILABILITY is selected automatically for the co-driver. When the vehicle stops, WORK is selected automatically for the driver.

The first change of activity arising within 120 seconds of the automatic change to WORK due to the vehicle stop is assumed to have happened at the time of vehicle stop (therefore possibly cancelling the change to WORK). This function outputs activity changes to the recording functions at a resolution of one minute.

Given a calendar minute, if any DRIVING activity has occurred within the minute, the whole minute is regarded as DRIVING. Given a calendar minute, if any DRIVING activity has occurred within both the immediately preceding and the immediately succeeding minute, the whole minute is regarded as DRIVING. Given a calendar minute that is not regarded as DRIVING according to previous requirements, the whole minute is regarded to be of the same type of activity as the longest continuous activity within the minute (or the latest of the equally longest). This function permanently and automatically monitors the driving status. The driving status CREW is selected when two valid driver cards are inserted in the equipment, the driving status SINGLE is selected in any other case.

2. Recorded Through Manual Entries

This function allows for the entry of places where the daily work periods begin and/or end for a driver and/or a co-driver. Places are defined as the country and, in addition where applicable, the region (Spain only). 

At the time of a driver (or workshop) card withdrawal, the recording equipment prompts the (co-) driver to enter a “place where the daily work period ends”. The recording equipment also allows this request to be disregarded. It is possible to input places where daily work periods begin and/or end without card or at times other than card insertion or withdrawal.

The recording equipment records and stores in its data memory whenever a (co)-driver enters the place where a daily work period begins and/or ends:

  • If applicable, the (co)-driver card number and card issuing Member State,
  • The date and time of the entry (or the date/time related to the entry when the entry is made during the manual entry procedure),
  • The type of entry (begin or end, condition of entry),
  • The country and region entered,
  • The vehicle odometer value.

The data memory holds daily work periods start and/or end data for at least 365 days (with the assumption that one driver enters two records per day).

Upon driver (or workshop) card insertion, and only at this time, the recording equipment:

  • Reminds the cardholder the date and time of his last card withdrawal, and
  • Asks the cardholder to identify if the current insertion of the card represents a continuation of the current daily work period.

The recording equipment allows the cardholder to disregard the question without answering, or to answer positively, or to answer negatively:

  • In the case where the cardholder disregards the question, the recording equipment prompts the cardholder for a “place where the daily work period begins”. The recording equipment allows this request to be disregarded. If a location is entered, then it is recorded, in the data memory and in the tachograph card, and related to the card insertion time,
  • In the case of a negative or positive answer, the recording equipment invites the cardholder to enter activities manually, with their dates and times of beginning and end, among WORK, AVAILABILITY, or BREAK/REST only, strictly included within the period last card withdrawal – current insertion only, and without allowing such activities to overlap mutually.

During this whole process, the recording equipment waits for entries no longer than the following time-outs:

  • If no interaction with the equipment’s human machine interface is happening during one minute (with a visual, and possibly audible, warning after 30 seconds) or,
  • If the card is withdrawn or another driver (or workshop) card is inserted or,
  • As soon as the vehicle is moving.

The recording equipment validates any entries already made.

Entry of Specific Conditions

The recording equipment allows the driver to enter, in real time, the following two specific conditions:

  • • “OUT OF SCOPE” (begin, end)
  • • “FERRY/TRAIN CROSSING”

A “FERRY/TRAIN CROSSING” may not occur if an “OUT OF SCOPE” condition is opened. An opened “OUT OF SCOPE” condition must be automatically closed, by the recording equipment, if a driver card is inserted or withdrawn.

Warnings

The recording equipment warns the driver when detecting any event and/or fault.

Warnings are visual. Audible warnings may also be provided in addition to visual warnings. Visual warnings are clearly recognisable by the user, are situated in the driver’s field of vision and are clearly legible both by day and by night. Visual warnings may be built into the recording equipment and/or remote from the recording equipment. In the latter case it bears a “T” symbol and is amber or orange.

Warnings have a duration of at least 30 seconds, unless acknowledged by the user by hitting any key of the recording equipment. This first acknowledgement does not erase warning cause display referred to in the next paragraph. Warning cause is displayed on the recording equipment and remains visible until acknowledged by the user using a specific key or command of the recording equipment.

The recording equipment warns the driver 15 minutes before and at the time of exceeding 4h30 minutes continuous driving time. In addition to the warnings linked to malfunctionings of the recording equipment and/or the tachograph card inserted, the recording equipment also warns the driver 15 minutes before and at the time of exceeding 4h30 minutes continuous driving time.