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) (c. 799)

ANNEX I C U.K. Requirements for construction, testing, installation, and inspection

Appendix 2

TACHOGRAPH CARDS SPECIFICATION U.K.

3. HARDWARE AND COMMUNICATION U.K.

3.5. Command descriptions U.K.

3.5.2 READ BINARY U.K.

3.5.2.1 Command with offset in P1-P2 U.K.

3.5.2.1.1 Command with secure messaging (examples) U.K.

TCS_47 Response Message if incorrect Secure Messaging input format U.K.

Byte	Length	Value	Description
SW	2	‘XXXXh’	Status Words (SW1,SW2)

• If no current session key is available, the processing state ‘6A88’ is returned. It happens either if the session key has not already been generated or if the session key validity has expired (in this case the IFD must re-run a mutual authentication process to set a new session key).

• If some expected data objects (as specified above) are missing in the secure messaging format, the processing state ‘6987’ is returned: this error happens if an expected tag is missing or if the command body is not properly constructed.

• If some data objects are incorrect, the processing state returned is ‘6988’: this error happens if all the required tags are present but some lengths are different from the ones expected.

• If the verification of the cryptographic checksum fails, the processing state returned is ‘6688’.