| 摘要 |
PROBLEM TO BE SOLVED: To monitor the periodicity of the messages sent over a network. SOLUTION: The device includes: a memory 4 for storing object messages which are received from the network and each have a value 8 indicating the reception deadline of the messages; local clock means 9 which are synchronized by a periodic internal signal and continuously generate a local time-value signal; means 13 for comparing each message-reception deadline value 21, 22, 23 with the local time value and for generating an overdue signal when the value indicating the reception deadline of the message is less than or equal to the local time value; and means 15 for generating a signal, intended for an external microcontroller 5 and indicating that the message has not been received, on the basis of the overdue signal. COPYRIGHT: (C)2009,JPO&INPIT
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