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- Original (As adopted by EU)
Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport
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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 P3max is detected by the VU, the communication shall be terminated without any response primitive being issued.
[CPR_024] The message formats for the StopCommunication primitives are detailed in the following tables:
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 |
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 | C2 | SPRPR |
#6 | Checksum | 00-FF | CS |
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 |
This service does not require any parameter definition.] ]
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