BS EN 15430-1:2007 pdf free.Winter and road servicearea maintenance equipments — Dataacquisition and transmission—In vehicle data acquisition.
BS EN 15430-1 This European Standard specifies a standardized protocol for downloading data from the equipment control box to an in-vehicle board computer to ensure interchangeability between a vehicle and different equipments that thesame vehicle can carry.
lt specifies the interface connection as well as variables, records and reports which permit standardized protoco to cover applications with the greatest possible variety of equipments for performing winter maintenance and roadservice area maintenance.
IS0 8859-1, Information technology – 8-bit single-byte coded graphic character sets – Part 1: Latin alphabet No.NMEA 0183,Interface Standard.
TIA-232-F, Interface between data terminal equipment and data circuit-terminating equipment employing serialbinary data interchange (RS232).
SAEJ1939/71, Recommended practice for serial control and communications vehicle network – Vehicle applicationlayer.
In this definition a message to be communicated consists of one record.Records are terminated by CR+LF (arecord is one line of text). In general, a message is sent by the sender (e.g.the “Data transmission handler” of aspreader) and received by the receiver (e.g. the Board-computer).After power up, communication is always startedby the vehicle/equipment “Data transmission handler” sending its first message (this is the time synchronisationrecord). Refer to Figure 4 for flow charts of the sender and receiver algorithms.
The receiver will check the validity of a message by testing if the CRC-16 value corresponds to the data in themessage received. If the data is valid, the receiver sends an ACK. The sender can now send a new message.lfthe data is invalid, the receiver sends a NAK.Then, the sender will try to send the same message again for amaximum of 2 times. If the message stil fails, the message is considered to be lost. Preferably, a notification isgiven to the user (operator) that data has been lost by the sender and/or the receiver.
Remark: The receiver sends an ACK or a NAK as a single character without other data. The ACK or NAK refers tothe latest message sent by the sender.To avoid record synchronisation problems between sender and receiver,the sender must ignore any ACK or NAK received during the transmission of a message until the last byte is sent(EOT character). Also, the receiver is not allowed to send an ACK or NAK during the reception of a message untilthe last byte is received (EOT character).BS EN 15430-1 pdf download.