Method and system for transmitting data of a data type to be transmitted cyclically and of a data type which can be transmitted acyclically via a common transmission channel

A transmission system for transmitting, via a common transmission channel, data of a data type to be transmitted cyclically and data of a data type which can be transmitted acyclically, the transmission system comprising:

• 1) a first participant unit, connected to the transmission channel, for
• a) executing a protocol-specific cyclic transmission for transmitting at least one protocol-specific cyclic transmission sequence of transmission messages with data of the data type to be transmitted cyclically, wherein the transmission messages are intended for at least one further participant unit connected to the transmission channel,
• b) for each protocol-specific cyclic transmission sequence of transmission messages, at least one particular position within the protocol-specific cyclic transmission sequence, checking the data of the data type to be transmitted cyclically, transmitted with the transmission message transmitted immediately before, for redundancy and currency with respect to the data of the data type to be transmitted cyclically which are provided for the immediately impending transmission message, and
• c) when such an impending transmission message is detected, for which redundant data of the data type to be transmitted cyclically are provided without new information content, inserting, instead of these data, data of a data type which can be transmitted acyclically, into a data area provided for the data of the data type to be transmitted cyclically;
• and
• 2) said at least one further participant unit.