Tolerating messages with data lengths exceeding 8 bytes

ECU, messages and signals that exceed the 8-byte limit are marked with an exclamation mark:

In addition to messages that are defined by maximally 8 bytes of data, the DBC format also enables the definition of messages with data lengths exceeding 8 bytes. These cannot be transmitted with a CAN Frame. A transport protocol must be used for the transmission of such large messages (as are usual, for example, with the J1939 protocol).

Such a high protocol is not implemented. However, such messages are read and marked with an exclamation mark. For a better overview, the ECU and the signals that exceed the 8-byte limit are also marked in the same way.