# Commission Implementing Regulation (EU) 2016/799 of 18 March 2016 implementing Regulation (EU) No 165/2014 of the European Parliament and of the Council laying down the requirements for the construction, testing, installation, operation and repair of tachographs and their components (Text with EEA relevance), Appendix 8

Extent: E+W+S+N.I.

CALIBRATION PROTOCOL
1.
INTRODUCTION
This appendix describes how data is exchanged between a vehicle unit and a tester via the K-line which forms part of the calibration interface described in Appendix 6. It also describes control of the input/output signal line on the calibration connector.
Establishing K-line communications is described in Section 4 ‘Communication Services’.
This appendix uses the idea of diagnostic ‘sessions’ to determine the scope of K-line control under different conditions. The default session is the ‘StandardDiagnosticSession’ where all data can be read from a vehicle unit but no data can be written to a vehicle unit.
Selection of the diagnostic session is described in Section 5 ‘Management Services’.
This appendix has to be considered as relevant for both generations of VUs and of workshop cards, in compliance with the interoperability requirements laid down in this Regulation.
CPR_001
The ‘ECUProgrammingSession’ allows data entry into the vehicle unit. In the case of entry of calibration data, the vehicle unit must, in addition be in the CALIBRATION mode of operation.
Data transfer via K-line is described in Section 6 ‘Data Transmission Services’. Formats of data transferred are detailed in Section 8 ‘dataRecords formats’.
CPR_002
The ‘ECUAdjustmentSession’ allows the selection of the I/O mode of the calibration I/O signal line via the K-line interface. Control of the calibration I/O signal line is described in section 7 ‘Control of Test Pulses — Input/Output Control functional unit’.
CPR_003
Throughout this document the address of the tester is referred to as ‘tt’. Although there may be preferred addresses for testers, the VU shall respond correctly to any tester address. The physical address of the VU is 0xEE.
2.
TERMS, DEFINITIONS AND REFERENCES
The protocols, messages and error codes are principally based on a draft of ISO 14229-1 (Road vehicles — Diagnostic systems — Part 1: Diagnostic services, version 6 of 22 February 2001).
Byte encoding and hexadecimal values are used for the service identifiers, the service requests and responses, and the standard parameters.
The term ‘tester’ refers to the equipment used to enter programming/calibration data into the VU.
The terms ‘client’ and ‘server’ refer to the tester and the VU respectively.
The term ECU means ‘Electronic Control Unit’ and refers to the VU.
References:
ISO 14230-2: Road Vehicles -Diagnostic Systems — Keyword Protocol 2000- Part 2: Data Link Layer.
First edition: 1999.
3.
OVERVIEW OF SERVICES
3.1.
Services available
The following table provides an overview of the services that will be available in the tachograph and are defined in this document.
CPR_004
The table indicates the services that are available in an enabled diagnostic session.
The 1st column lists the services that are available.
The 2nd column includes the section number in this appendix where of service is further defined.
The 3rd column assigns the service identifier values for request messages.
The 4th column specifies the services of the ‘StandardDiagnosticSession’ (SD) which must be implemented in each VU.
The 5th column specifies the services of the ‘ECUAdjustmentSession’ (ECUAS) which must be implemented to allow control of the I/O signal line in the front panel calibration connector of the VU.
The 6th column specifies the services of the ‘ECUProgrammingSession’ (ECUPS) which must be implemented to allow for programming of parameters in the VU.
Table 1
Service Identifier value summary table
■This symbol indicates that the service is mandatory in this diagnostic session.
No symbol indicates that this service is not allowed in this diagnostic session.
Diagnostic Sessions
Diagnostic Service Name
Section No.
SId Req.Value
SD
ECUAS
ECUPS
StartCommunication
4.1
81
■
■
■
StopCommunication
4.2
82
■
TesterPresent
4.3
3E
■
■
■
StartDiagnosticSession
5.1
10
■
■
■
SecurityAccess
5.2
27
■
■
■
ReadDataByIdentifier
6.1
22
■
■
■
WriteDataByIdentifier
6.2
2E
■
InputOutputControlByIdentifier
7.1
2F
■
3.2.
Response codes
Response codes are defined for each service.
4.
COMMUNICATION SERVICES
Some services are necessary to establish and maintain communication. They do not appear on the application layer. The services available are detailed in the following table:
Table 2
Communication Services
Service name
Description
StartCommunication
The client requests to start a communication session with a server(s).
StopCommunication
The client requests to stop the current communication session.
TesterPresent
The client indicates to the server that it is still present.
CPR_005
The StartCommunication Service is used for starting a communication. In order to perform any service, communication must be initialised and the communication parameters need to be appropriate for the desired mode.
4.1.
StartCommunication Service
CPR_006
Upon receiving a StartCommunication indication primitive, the VU shall check if the requested communication link can be initialised under the present conditions. Valid conditions for the initialisation of a communication link are described in document ISO 14230-2.
CPR_007
Then the VU shall perform all actions necessary to initialise the communication link and send a StartCommunication response primitive with the Positive Response parameters selected.
CPR_008
If a VU that is already initialised (and has entered any diagnostic session) receives a new StartCommunication Request (e.g. due to error recovery in the tester) the request shall be accepted and the VU shall be reinitialised.
CPR_009
If the communication link cannot be initialised for any reason, the VU shall continue operating as it was immediately prior to the attempt to initialise the communication link..
CPR_010
The StartCommunication Request message must be physically addressed.
CPR_011
Initialising the VU for services is performed through a ‘fast initialisation’ method,
There is a bus-idle time prior to any activity.
The tester then sends an initialisation pattern.
All information which is necessary to establish communication is contained in the response of the VU.
CPR_012
After completion of the initialisation,
All communication parameters are set to values defined in Table 4 according to the key bytes.
The VU is waiting for the first request of the tester.
The VU is in the default diagnostic mode, i.e. StandardDiagnosticSession.
The calibration I/O signal line is in the default state, i.e. disabled state.
CPR_014
The data rate on the K-line shall be 10 400 Baud.
CPR_016
The fast initialisation is started by the tester transmitting a Wake up pattern (Wup) on the K-line. The pattern begins after the idle time on K-line with a low time of Tinil. The tester transmits the first bit of the StartCommunication Service after a time of Twup following the first falling edge.
CPR_017
The timing values for the fast initialisation and communications in general are detailed in the tables below. There are different possibilities for the idle time:
First transmission after power on, Tidle = 300 ms.
After completion of a StopCommunication Service, Tidle = P3 min.
After stopping communication by time-out P3 max, Tidle = 0.
Table 3
Timing values for fast initialisation
Parameter
min value
max value
Tinil
25 ± 1 ms
24 ms
26 ms
Twup
50 ± 1 ms
49 ms
51 ms
Table 4
Communication timing values
Timing Parameter
Parameter Description
lower limit values [ms]
upper limit values [ms]
min.
max.
P1
Inter byte time for VU response
0
20
P2
Time between tester request and VU response or two VU responses
25
250
P3
Time between end of VU responses and start of new tester request
55
5 000
P4
Inter byte time for tester request
5
20
CPR_018
The message format for fast initialisation is detailed in the following tables. (NOTE: Hex means hexadecimal)
Table 5
StartCommunication Request Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
81
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
StartCommunication Request Service Id
81
SCR
#5
Checksum
00-FF
CS
Table 6
StartCommunication Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
StartCommunication Positive Response Service Id
C1
SCRPR
#6
Key byte 1
EA
KB1
#7
Key byte 2
8F
KB2
#8
Checksum
00-FF
CS
CPR_019
There is no negative response to the StartCommunication Request message, if there is no positive response message to be transmitted then the VU is not initialised, nothing is transmitted and it remains in its normal operation.
4.2.
StopCommunication Service
4.2.1
Message description
The purpose of this communication layer service is to terminate a communication session.
CPR_020
Upon receiving a StopCommunication indication primitive, the VU shall check if the current conditions allow to terminate this communication. In this case the VU shall perform all actions necessary to terminate this communication.
CPR_021
If it is possible to terminate the communication, the VU shall issue a StopCommunication response primitive with the Positive Response parameters selected, before the communication is terminated.
CPR_022
If the communication cannot be terminated by any reason, the VU shall issue a StopCommunication response primitive with the Negative Response parameter selected.
CPR_023
If time-out of P3 max is detected by the VU, the communication shall be terminated without any response primitive being issued.
4.2.2
Message format
CPR_024
The message formats for the StopCommunication primitives are detailed in the following tables.
Table 7
StopCommunication Request Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
01
LEN
#5
StopCommunication Request Service Id
82
SPR
#6
Checksum
00-FF
CS
Table 8
StopCommunication Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
01
LEN
#5
StopCommunication Positive Response Service Id
C2
SPRPR
#6
Checksum
00-FF
CS
Table 9
StopCommunication Negative Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
negative Response Service Id
7F
NR
#6
StopCommunication Request Service Identification
82
SPR
#7
responseCode = generalReject
10
RC_GR
#8
Checksum
00-FF
CS
4.2.3
Parameter Definition
This service does not require any parameter definition.
4.3.
TesterPresent Service
4.3.1
Message description
The TesterPresent service is used by the tester to indicate to the server that it is still present, in order to prevent the server from automatically returning to normal operation and possibly stopping the communication. This service, sent periodically, keeps the diagnostic session/communication active by resetting the P3 timer each time a request for this service is received.
4.3.2
Message format
CPR_079
The message formats for the TesterPresent primitives are detailed in the following tables.
Table 10
TesterPresent Request Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
02
LEN
#5
TesterPresent Request Service Id
3E
TP
#6
Sub Function = responseRequired =
[ yes
01
RESPREQ_Y
no ]
02
RESPREQ_NO
#7
Checksum
00-FF
CS
CPR_080
If the responseRequired parameter is set to ‘yes’, then the server shall respond with the following positive response message. If set to ‘no’, then no response is sent by the server.
Table 11
TesterPresent Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
01
LEN
#5
TesterPresent Positive Response Service Id
7E
TPPR
#6
Checksum
00-FF
CS
CPR_081
The service shall support the following negative responses codes:
Table 12
TesterPresent Negative Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
negative Response Service Id
7F
NR
#6
TesterPresent Request Service Identification
3E
TP
#7
responseCode =
[SubFunctionNotSupported-InvalidFormat
12
RC_SFNS_IF
incorrectMessageLength]
13
RC_IML
#8
Checksum
00-FF
CS
5.
MANAGEMENT SERVICES
The services available are detailed in the following table:
Table 13
Management Services
Service name
Description
StartDiagnosticSession
The client requests to start a diagnostic session with a VU.
SecurityAccess
The client requests access to functions restricted to authorised users.
5.1.
StartDiagnosticSession service
5.1.1
Message description
CPR_025
The service StartDiagnosticSession is used to enable different diagnostic sessions in the server. A diagnostic session enables a specific set of services according to Table 17. A session can enable vehicle manufacturer specific services which are not part of this document. Implementation rules shall conform to the following requirements:
There shall be always exactly one diagnostic session active in the VU,
The VU shall always start the StandardDiagnosticSession when powered up. If no other diagnostic session is started, then the StandardDiagnosticSession shall be running as long as the VU is powered,
If a diagnostic session which is already running has been requested by the tester, then the VU shall send a positive response message,
Whenever the tester requests a new diagnostic session, the VU shall first send a StartDiagnosticSession positive response message before the new session becomes active in the VU. If the VU is not able to start the requested new diagnostic session, then it shall respond with a StartDiagnosticSession negative response message, and the current session shall continue.
CPR_026
A diagnostic session shall only be started if communication has been established between the client and the VU.
CPR_027
The timing parameters defined in Table 4 shall be active after a successful StartDiagnosticSession with the diagnosticSession parameter set to ‘StandardDiagnosticSession’ in the request message if another diagnostic session was previously active.
5.1.2
Message format
CPR_028
The message formats for the StartDiagnosticSession primitives are detailed in the following tables.
Table 14
StartDiagnosticSession Request Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
02
LEN
#5
StartDiagnosticSession Request Service Id
10
STDS
#6
diagnosticSession = [one value from Table 17]
xx
DS_…
#7
Checksum
00-FF
CS
Table 15
StartDiagnosticSession Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
02
LEN
#5
StartDiagnosticSession Positive Response Service Id
50
STDSPR
#6
diagnosticSession = [same value as in byte #6 Table 14]
xx
DS_…
#7
Checksum
00-FF
CS
Table 16
StartDiagnosticSession Negative Response Message
– the value inserted in byte #6 of the request message is not supported, i.e. not in Table 17,
– the length of the message is wrong,
– the criteria for the request StartDiagnosticSession are not met.
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
Negative Response Service Id
7F
NR
#6
StartDiagnosticSession Request Service Id
10
STDS
#7
ResponseCode =
[subFunctionNotSupported
12
RC_SFNS
incorrectMessageLength
13
RC_IML
conditionsNotCorrect
22
RC_CNC
#8
Checksum
00-FF
CS
5.1.3
Parameter definition
CPR_029
The parameter diagnosticSession (DS_) is used by the StartDiagnosticSession service to select the specific behaviour of the server(s). The following diagnostic sessions are specified in this document:
Table 17
Definition of diagnosticSession Values
Hex
Description
Mnemonic
81
StandardDiagnosticSession
This diagnostic session enables all services specified in Table 1 column 4 “SD”. These services allow reading of data from a server (VU). This diagnostic Session is active after the initialisation has been successfully completed between client (tester) and server (VU). This diagnostic session may be overwritten by other diagnostic sessions specified in this section.
SD
85
ECUProgrammingSession
This diagnostic session enables all services specified in Table 1 column 6 “ECUPS”. These services support the memory programming of a server (VU) This diagnostic session may be overwritten by other diagnostic sessions specified in this section..
ECUPS
87
ECUAdjustmentSession
This diagnostic session enables all services specified in Table 1 column 5 “ECUAS”. These services support the input/output control of a server (VU). This diagnostic session may be overwritten by other diagnostic sessions specified in this section.
ECUAS
5.2.
SecurityAccess service
Writing of calibration data is not possible unless the VU is in CALIBRATION mode. In addition to insertion of a valid workshop card into the VU, it is necessary to enter the appropriate PIN into the VU before access to the CALIBRATION mode is granted.
When the VU is in CALIBRATION or CONTROL mode, access to the calibration input/output line is also possible.
The SecurityAccess service provides a means to enter the PIN and to indicate to the tester whether or not the VU is in CALIBRATION mode.
It is acceptable that the PIN may be entered through alternative methods.
5.2.1
Message Description
The SecurityAccess service consists of a SecurityAccess ‘requestSeed’ message, eventually followed by a SecurityAccess ‘sendKey’ message. The SecurityAccess service must be carried out after the StartDiagnosticSession service.
CPR_033
The tester shall use the SecurityAccess ‘requestSeed’ message to check if the vehicle unit is ready to accept a PIN.
CPR_034
If the vehicle unit is already in CALIBRATION mode, it shall answer the request by sending a ‘seed’ of 0x0000 using the service SecurityAccess Positive Response.
CPR_035
If the vehicle unit is ready to accept a PIN for verification by a workshop card, it shall answer the request by sending a ‘seed’ greater than 0x0000 using the service SecurityAccess Positive Response.
CPR_036
If the vehicle unit is not ready to accept a PIN from the tester, either because the workshop card inserted is not valid, or because no workshop card has been inserted, or because the vehicle unit expects the PIN from another method, it shall answer the request with a Negative Response with a response code set to conditionsNotCorrectOrRequestSequenceError.
CPR_037
The tester shall then, eventually, use the SecurityAccess ‘sendKey’ message to forward a PIN to the Vehicle Unit. To allow time for the card authentication process to take place, the VU shall use the negative response code requestCorrectlyReceived-ResponsePending to extend the time to respond. However, the maximum time to respond shall not exceed 5 minutes. As soon as the requested service has been completed, the VU shall send a positive response message or negative response message with a response code different from this one. The negative response code requestCorrectlyReceived-ResponsePending may be repeated by the VU until the requested service is completed and the final response message is sent.
CPR_038
The vehicle unit shall answer to this request using the service SecurityAccess Positive Response only when in CALIBRATION mode.
CPR_039
In the following cases, the vehicle unit shall answer to this request with a Negative Response with a response code set to:
subFunctionNot supported: Invalid format for the subfunction parameter (accessType),
conditionsNotCorrectOrRequestSequenceError: Vehicle unit not ready to accept a PIN entry,
invalidKey: PIN not valid and number of PIN checks attempts not exceeded,
exceededNumberOfAttempts: PIN not valid and number of PIN checks attempts exceeded,
generalReject: Correct PIN but mutual authentication with workshop card failed.
5.2.2
Message format — SecurityAccess — requestSeed
CPR_040
The message formats for the SecurityAccess ‘requestSeed’ primitives are detailed in the following tables.
Table 18
SecurityAccess Request- requestSeed Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
02
LEN
#5
SecurityAccess Request Service Id
27
SA
#6
accessType — requestSeed
7D
AT_RSD
#7
Checksum
00-FF
CS
Table 19
SecurityAccess — requestSeed Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
04
LEN
#5
SecurityAccess Positive Response Service Id
67
SAPR
#6
accessType — requestSeed
7D
AT_RSD
#7
Seed High
00-FF
SEEDH
#8
Seed Low
00-FF
SEEDL
#9
Checksum
00-FF
CS
Table 20
SecurityAccess Negative Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
negativeResponse Service Id
7F
NR
#6
SecurityAccess Request Service Id
27
SA
#7
responseCode =
[conditionsNotCorrectOrRequestSequenceError
22
RC_CNC
incorrectMessageLength]
13
RC_IML
#8
Checksum
00-FF
CS
5.2.3
Message format — SecurityAccess — sendKey
CPR_041
The message formats for the SecurityAccess ‘sendKey’ primitives are detailed in the following tables.
Table 21
SecurityAccess Request — sendKey Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
m+2
LEN
#5
SecurityAccess Request Service Id
27
SA
#6
accessType — sendKey
7E
AT_SK
#7 to #m + 6
Key #1 (High)
xx
KEY
…
…
Key #m (low, m must be a minimum of 4, and a maximum of 8)
xx
#m + 7
Checksum
00-FF
CS
Table 22
SecurityAccess — sendKey Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
02
LEN
#5
SecurityAccess Positive Response Service Id
67
SAPR
#6
accessType — sendKey
7E
AT_SK
#7
Checksum
00-FF
CS
Table 23
SecurityAccess Negative Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
NegativeResponse Service Id
7F
NR
#6
SecurityAccess Request Service Id
27
SA
#7
ResponseCode =
[generalReject
10
RC_GR
subFunctionNotSupported
12
RC_SFNS
incorrectMessageLength
13
RC_IML
conditionsNotCorrectOrRequestSequenceError
22
RC_CNC
invalidKey
35
RC_IK
exceededNumberOfAttempts
36
RC_ENA
requestCorrectlyReceived-ResponsePending]
78
RC_RCR_RP
#8
Checksum
00-FF
CS
6.
DATA TRANSMISSION SERVICES
The services available are detailed in the following table:
Table 24
Data Transmission Services
Service name
Description
ReadDataByIdentifier
The client requests the transmission of the current value of a record with access by recordDataIdentifier.
WriteDataByIdentifier
The client requests to write a record accessed by recordDataIdentifier.
6.1.
ReadDataByIdentifier service
6.1.1
Message description
CPR_050
The ReadDataByIdentifier service is used by the client to request data record values from a server. The data are identified by a recordDataIdentifier. It is the VU manufacturer's responsibility that the server conditions are met when performing this service.
6.1.2
Message format
CPR_051
The message formats for the ReadDataByIdentifier primitives are detailed in the following tables.
Table 25
ReadDataByIdentifier Request Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
03
LEN
#5
ReadDataByIdentifier Request Service Id
22
RDBI
#6 to #7
recordDataIdentifier = [a value fromTable 28]
xxxx
RDI_…
#8
Checksum
00-FF
CS
Table 26
ReadDataByIdentifier Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
m+3
LEN
#5
ReadDataByIdentifier Positive Response Service Id
62
RDBIPR
#6 and #7
recordDataIdentifier = [the same value as bytes #6 and #7 Table 25]
xxxx
RDI_...
#8 to #m + 7
dataRecord[] =
[data#1
xx
DREC_DATA1
:
:
:
data#m]
xx
DREC_DATAm
#m + 8
Checksum
00-FF
CS
Table 27
ReadDataByIdentifier Negative Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
NegativeResponse Service Id
7F
NR
#6
ReadDataByIdentifier Request Service Id
22
RDBI
#7
ResponseCode=
[requestOutOfRange
31
RC_ROOR
incorrectMessageLength
13
RC_IML
conditionsNotCorrect]
22
RC_CNC
#8
Checksum
00-FF
CS
6.1.3
Parameter Definition
CPR_052
The parameter recordDataIdentifier (RDI_) in the ReadDataByIdentifier request message identifies a data record.
CPR_053
recordDataIdentifier values defined by this document are shown in the table below.
The recordDataIdentifier table consists of four columns and multiple lines.
The 1st column (Hex) includes the ‘Hex Value’ assigned to the recordDataIdentifier specified in the 3rd column.
The 2nd column (Data element) specifies the data element of Appendix 1 on which the recordDataIdentifier is based (transcoding is sometimes necessary).
The 3rd column (Description) specifies the corresponding recordDataIdentifier name.
The 4th column (Mnemonic) specifies the mnemonic of this recordDataIdentifier.
Table 28
Definition of recordDataIdentifier values
Hex
Data element
recordDataIdentifier Name(see format in Section 8.2)
Mnemonic
F90B
TimeDate
RDI_TD
F912
HighResolutionTotalVehicleDistance
RDI_HRTVD
F918
Kfactor
RDI_KF
F91C
LfactorTyreCircumference
RDI_LF
F91D
WvehicleCharacteristicFactor
RDI_WVCF
F921
TyreSize
RDI_TS
F922
NextCalibrationDate
RDI_NCD
F92C
SpeedAuthorised
RDI_SA
F97D
RegisteringMemberState
RDI_RMS
F97E
VehicleRegistrationNumber
RDI_ VRN
F190
VIN
RDI_ VIN
CPR_054
The parameter dataRecord (DREC_) is used by the ReadDataByIdentifier positive response message to provide the data record value identified by the recordDataIdentifier to the client (tester). Data formats are specified in section 8. Additional user optional dataRecords including VU specific input, internal and output data may be implemented, but are not defined in this document.
6.2.
WriteDataByIdentifier service
6.2.1
Message description
CPR_056
The WriteDataByIdentifier service is used by the client to write data record values to a server. The data are identified by a recordDataIdentifier. It is the VU manufacturer's responsibility that the server conditions are met when performing this service. To update the parameters listed in Table 28 the VU must be in CALIBRATION mode.
6.2.2
Message format
CPR_057
The message formats for the WriteDataByIdentifier primitives are detailed in the following tables.
Table 29
WriteDataByIdentifier Request Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
m + 3
LEN
#5
WriteDataByIdentifier Request Service Id
2E
WDBI
#6 to #7
recordDataIdentifier = [a value from Table 28]
xxxx
RDI_…
#8 to m + 7
dataRecord[] =
[data#1
xx
DREC_DATA1
:
:
:
data#m]
xx
DREC_DATAm
#m + 8
Checksum
00-FF
CS
Table 30
WriteDataByIdentifier Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
WriteDataByIdentifier Positive Response Service Id
6E
WDBIPR
#6 to #7
recordDataIdentifier = [the same value as bytes #6 and #7 Table 29]
xxxx
RDI_…
#8
Checksum
00-FF
CS
Table 31
WriteDataByIdentifier Negative Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
NegativeResponse Service Id
7F
NR
#6
WriteDataByIdentifier Request Service Id
2E
WDBI
#7
ResponseCode=
[requestOutOfRange
31
RC_ROOR
incorrectMessageLength
13
RC_IML
conditionsNotCorrect]
22
RC_CNC
#8
Checksum
00-FF
CS
6.2.3
Parameter definition
The parameter recordDataIdentifier (RDI_) is defined in Table 28.
The parameter dataRecord (DREC_) is used by the WriteDataByIdentifier request message to provide the data record values identified by the recordDataIdentifier to the server (VU). Data formats are specified in section 8.
7.
CONTROL OF TEST PULSES — INPUT/OUTPUT CONTROL FUNCTIONAL UNIT
The services available are detailed in the following table:
Table 32
Input/Output Control functional unit
Service name
Description
InputOutputControlByIdentifier
The client requests the control of an input/output specific to the server.
7.1.
InputOutputControlByIdentifier service
7.1.1
Message description
There is a connection via the front connector which allows test pulses to be controlled or monitored using a suitable tester.
CPR_058
This calibration I/O signal line can be configured by K-line command using the InputOutputControlByIdentifier service to select the required input or output function for the line. The available states of the line are:
disabled,
speedSignalInput, where the calibration I/O signal line is used to input a speed signal (test signal) replacing the motion sensor speed signal, this function is not available in CONTROL mode,
realTimeSpeedSignalOutputSensor, where the calibration I/O signal line is used to output the speed signal of the motion sensor,
RTCOutput, where the calibration I/O signal line is used to output the UTC clock signal, this function is not available in CONTROL mode.
CPR_059
The vehicle unit must have entered an adjustment session and must be in CALIBRATION or CONTROL mode to configure the state of the line. When the VU is in CALIBRATION mode, the four states of the line can be selected (disabled, speedSignalInput, realTimeSpeedSignalOutputSensor, RTCOutput). When the VU is in CONTROL mode, only two states of the lines can be selected (disabled, realTimeSpeedOutputSensor). On exit of the adjustment session or of the CALIBRATION or CONTROL mode the vehicle unit must ensure the calibration I/O signal line is returned to the ‘disabled’ (default) state.
CPR_060
If speed pulses are received at the real time speed signal input line of the VU while the calibration I/O signal line is set to input then the calibration I/O signal line shall be set to output or returned to the disabled state.
CPR_061
The sequence shall be:
Establish communications by StartCommunication Service
Enter an adjustment session by StartDiagnosticSession Service and be in CALIBRATION or CONTROL mode of operation (the order of these two operation is not important).
Change the state of the output by InputOutputControlByIdentifier Service.
7.1.2
Message format
CPR_062
The message formats for the InputOutputControlByIdentifier primitives are detailed in the following tables.
Table 33
InputOutputControlByIdentifier Request Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
EE
TGT
#3
Source address byte
tt
SRC
#4
Additional length byte
xx
LEN
#5
InputOutputControlByIdentifier Request Sid
2F
IOCBI
#6 and #7
InputOutputIdentifier = [CalibrationInputOutput]
F960
IOI_CIO
#8 or
#8 to #9
ControlOptionRecord = [
COR_…
inputOutputControlParameter — one value from Table 36
xx
IOCP_…
controlState — one value from Table 37 (see note below)]
xx
CS_…
#9 or #10
Checksum
00-FF
CS
Note: The controlState parameter is present only in some cases (see 7.1.3).
Table 34
InputOutputControlByIdentifier Positive Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
xx
LEN
#5
inputOutputControlByIdentifier Positive Response SId
6F
IOCBIPR
#6 and #7
inputOutputIdentifier = [CalibrationInputOutput]
F960
IOI_CIO
#8 or
#8 to #9
controlStatusRecord = [
CSR_
inputOutputControlParameter (same value as byte #8 Table 33)
xx
IOCP_…
controlState (same value as byte #9 Table 33)] (if applicable)
xx
CS_…
#9 or #10
Checksum
00-FF
CS
Table 35
InputOutputControlByIdentifier Negative Response Message
Byte #
Parameter Name
Hex Value
Mnemonic
#1
Format byte — physical addressing
80
FMT
#2
Target address byte
tt
TGT
#3
Source address byte
EE
SRC
#4
Additional length byte
03
LEN
#5
negativeResponse Service Id
7F
NR
#6
inputOutputControlByIdentifier Request SId
2F
IOCBI
#7
responseCode=[
incorrectMessageLength
13
RC_IML
conditionsNotCorrect
22
RC_CNC
requestOutOfRange
31
RC_ROOR
deviceControlLimitsExceeded]
7A
RC_DCLE
#8
Checksum
00-FF
CS
7.1.3
Parameter definition
CPR_064
The parameter inputOutputControlParameter (IOCP_) is defined in the following table.
Table 36
Definition of inputOutputControlParameter values
Hex
Description
Mnemonic
00
ReturnControlToECU
This value shall indicate to the server (VU) that the tester does no longer have control about the calibration I/O signal line.
RCTECU
01
ResetToDefault
This value shall indicate to the server (VU) that it is requested to reset the calibration I/O signal line to its default state.
RTD
03
ShortTermAdjustment
This value shall indicate to the server (VU) that it is requested to adjust the calibration I/O signal line to the value included in the controlState parameter.
STA
CPR_065
The parameter controlState is present only when the inputOutputControlParameter is set to ShortTermAdjustment and is defined in the following table:
Table 37
Definition of controlState values
Mode
Hex Value
Description
Disable
00
I/O line is disabled (default state)
Enable
01
Enable calibration I/O line as speedSignalInput
Enable
02
Enable calibration I/O line as realTimeSpeedSignalOutputSensor
Enable
03
Enable calibration I/O line as RTCOutput
8.
DATARECORDS FORMATS
This section details:
general rules that shall be applied to ranges of parameters transmitted by the vehicle unit to the tester,
formats that shall be used for data transferred via the Data Transmission Services described in section 6.
CPR_067
All parameters identified shall be supported by the VU.
CPR_068
Data transmitted by the VU to the tester in response to a request message shall be of the measured type (i.e. current value of the requested parameter as measured or observed by the VU).
8.1.
Transmitted parameter ranges
CPR_069
Table 38 defines the ranges used to determine the validity of a transmitted parameter.
CPR_070
The values in the range ‘error indicator’ provide a means for the vehicle unit to immediately indicate that valid parametric data is not currently available due to some type of error in the tachograph.
CPR_071
The values in the range ‘not available’ provide a means for the vehicle unit to transmit a message which contains a parameter that is not available or not supported in that module. The values in the range ‘not requested’ provide a means for a device to transmit a command message and identify those parameters where no response is expected from the receiving device.
CPR_072
If a component failure prevents the transmission of valid data for a parameter, the error indicator as described in Table 38 should be used in place of that parameter's data. However, if the measured or calculated data has yielded a value that is valid yet exceeds the defined parameter range, the error indicator should not be used. The data should be transmitted using the appropriate minimum or maximum parameter value.
Table 38
dataRecords ranges
Range Name
1 byte(Hex value)
2 bytes(Hex value)
4 bytes(Hex Value)
ASCII
Valid signal
00 to FA
0000 to FAFF
00000000 to FAFFFFFF
1 to 254
Parameter specific indicator
FB
FB00 to FBFF
FB000000 to FBFFFFFF
none
Reserved range for future indicator bits
FC to FD
FC00 to FDFF
FC000000 to FDFFFFFF
none
Error indicator
FE
FE00 to FEFF
FE000000 to FEFFFFFF
0
Not available or not requested
FF
FF00 to FFFF
FF000000 to FFFFFFFF
FF
CPR_073
For parameters coded in ASCII, the ASCII character ‘*’ is reserved as a delimiter.
8.2.
dataRecords formats
Table 39 to Table 42 below detail the formats that shall be used via the ReadDataByIdentifier and WriteDataByIdentifier Services.
CPR_074
Table 39 provides the length, resolution and operating range for each parameter identified by its recordDataIdentifier:
Table 39
Format of dataRecords
Parameter Name
Data length (bytes)
Resolution
Operating range
TimeDate
8
See details in Table 40
HighResolutionTotalVehicleDistance
4
5 m/bit gain, 0 m offset
0 to + 21 055 406 km
Kfactor
2
0,001 pulse/m/bit gain, 0 offset
0 to 64,255 pulse/m
LfactorTyreCircumference
2
0,125 10– 3 m/bit gain, 0 offset
0 to 8,031 m
WvehicleCharacteristicFactor
2
0,001 pulse/m/bit gain, 0 offset
0 to 64,255 pulse/m
TyreSize
15
ASCII
ASCII
NextCalibrationDate
3
See details in Table 41
SpeedAuthorised
2
1/256 km/h/bit gain, 0 offset
0 to 250,996 km/h
RegisteringMemberState
3
ASCII
ASCII
VehicleRegistrationNumber
14
See details in Table 42
VIN
17
ASCII
ASCII
CPR_075
Table 40 details the formats of the different bytes of the TimeDate parameter:
Table 40
Detailed format of TimeDate (recordDataIdentifier value # F90B)
Byte
Parameter definition
Resolution
Operating range
1
Seconds
0,25 s/bit gain, 0 s offset
0 to 59,75 s
2
Minutes
1 min/bit gain, 0 min offset
0 to 59 min
3
Hours
1 h/bit gain, 0 h offset
0 to 23 h
4
Month
1 month/bit gain, 0 month offset
1 to 12 month
5
Day
0,25 day/bit gain, 0 day offset
(see NOTE below Table 41)
0,25 to 31,75 day
6
Year
1 year/bit gain, + 1985 year offset
(see NOTE below Table 41)
1985 to 2235 year
7
Local Minute Offset
1 min/bit gain, – 125 min offset
– 59 to + 59 min
8
Local Hour Offset
1 h/bit gain, – 125 h offset
– 23 to + 23 h
CPR_076
Table 41 details the formats of the different bytes of the NextCalibrationDate parameter.
Table 41
Detailed format of NextCalibrationDate (recordDataIdentifier value # F922)
Byte
Parameter definition
Resolution
Operating range
1
Month
1 month/bit gain, 0 month offset
1 to 12 month
2
Day
0,25 day/bit gain, 0 day offset
(see NOTE below)
0,25 to 31,75 day
3
Year
1 year/bit gain, + 1985 year offset
(see NOTE below)
1985 to 2235 year
NOTE concerning the use of the ‘Day’ parameter:
1))A value of 0 for the date is null. The values 1, 2, 3, and 4 are used to identify the first day of the month; 5, 6, 7, and 8 identify the second day of the month; etc.
2))This parameter does not influence or change the hours parameter above.
NOTE concerning the use of byte ‘Year’ parameter:
A value of 0 for the year identifies the year 1985; a value of 1 identifies 1986; etc.
CPR_078
Table 42 details the formats of the different bytes of the VehicleRegistrationNumber parameter:
Table 42
Detailed format of VehicleRegistrationNumber (recordDataIdentifier value # F97E)
Byte
Parameter definition
Resolution
Operating range
1
Code Page (as defined in Appendix 1)
ASCII
01 to 0A
2 - 14
Vehicle Registration Number (as defined in Appendix 1)
ASCII
ASCII

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Source: https://www.legislation.gov.uk/eur/2016/799/annex/1/appendix/8 (the official version)
Page: https://openlegislation.uk/eu-regulation-2016-799/annex-1/appendix-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.