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)

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

Appendix 14

REMOTE COMMUNICATION FUNCTION U.K.

5. REMOTE COMMUNICATION DESIGN AND PROTOCOLS U.K.

5.6 Data transfer between the DSRC-VU and VU U.K.

5.6.2 Application Protocol U.K.

DSC_71 The application protocol between the VU Remote Communication facility and DSRC-VU is responsible for periodically transferring the remote communication data from the VU to the DSRC. U.K.

DSC_72 The following main commands are identified: U.K.

1.

Initialisation of the communication link — Request

2.

Initialisation of the communication link — Response

3.

Send Data with Identifier of the RTM application and Payload defined by RTM Data

4.

Acknowledgment of the data

5.

Termination of the communication link — Request

6.

Termination of the communication link — Response

DSC_73 In ASN1.0, the previous commands may be defined as: U.K.

DSC_74 The description of the commands and parameters is following: U.K.

• is used to initialize the communication link. The command is sent by the VU to the DSRC-VU. The LinkIdentifier is set by the VU and communicated to the DSRC-VU to track a specific communication link.

  (Note: this is to support future links and other application/modules like Weighing on board). U.K.

• is used by the DSRC-VU to provide the response of the request to initialize the communication link. The command is sent by the DSRC-VU to the VU. The command provides the result of the initialisation as answer = 1 (Success) or =0 (Failure).

DSC_75 The initialization of the communication link shall be done only after installation, calibration, and start of the engine/VU is switched on. U.K.

• is used to by the VU to send the signed RCDTData (i.e., the remote communication Data) to the DSRC-VU. The data will be sent every 60 seconds. The DataTransactionId parameter identifies the specific transmission of data. The LinkIdentifier is also used to ensure that the appropriate link is correct.

• is sent by the DSRC-VU to provide the feedback to the VU on the reception of the data from a command identified by the DataTransactionId parameter. The Answer parameter is 1 (Success) or =0 (Failure). If a VU receives more than three answers equal to 0 or if the VU does not receive a RCDT Data Acknowledgment for a specific previously sent RCDT- Send Data with a specific DataTransactionId, the VU will generate and record an event.

• is sent by the VU to DSRC-VU to terminate a link for a specific LinkIdentifier.

DSC_76 At the restart of the DSRC-VU or a VU, all the existing Communication Links should be removed as there could be ‘dangling’ Links due to the sudden shutdown of a VU. U.K.

• is sent by the DSRC-VU to the VU to confirm the request of termination of the link by the VU for the specific LinkIdentifier.