Method for data transmission in a serial communication protocol by means of telegrams and data transmission device using this method

A data transmission device comprising

• a data preparation device (15) on a side of a sender for arrangement of data to be transmitted in data telegrams;
• a data transmission unit (16);
• a data transmission path (19) disposed downstream thereof for transmission of the data telegrams emitted by the data sender unit (16);
• a data receiver unit (20) disposed downstream thereof for receiving the data telegrams;
• and
• a data evaluation device (21) for further processing of the data telegrams,
• the data transmission device being adapted to execute following method steps for data transmission in telegrams in a serial communication protocol:
• assigning user data to be transmitted to telegrams, a basic structure of which comprising
• a telegram header (1) which includes information data concerning at least one of the group of a telegram length, addressing, distribution of the user data to be transmitted in several telegrams;
• a user data block (2) which includes at least a part of the user data to be transmitted;
• and
• a checksum block (3) which includes a checksum that is determined at least on the basis of the user data according to a checksum algorithm;
• and
• transmitting the telegrams in consecutive intervals along a data transmission path (19), wherein
• the user data block (2) of the telegrams is divided into several user data sub-blocks (2.1 to 2.k), each of which being protected separately by checksum sub-blocks (3.1 to 3.k).