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Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport
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[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 recording equipment.
[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.
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.] ]
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