| 摘要 |
PROBLEM TO BE SOLVED: To handle both of real-time data and event data with one kind of a communication network by dividing one period of communication data into a part for real-time data and a part for event data to perform the communication. SOLUTION: Communication data is divided into a real-time data part 1, which consists of real-time data 1a to 1n having a certain data length which are generated by successive response from a master station P to all slave stations A to N within a certain time, and an event data part 2 consisting of event data 2a to 2m (event data 2m to 2b in the case of the second period) of arbitrary M stations (M<N) out of event data 2a to 2n which are generated from slave stations A to N requesting the communication any time and are different in data length by slave stations A to N, and these data parts are added to constitute communication data 3 of one period. Consequently, both of the quickness or data control in the rear time system and the quickness of communication for handling of a large quantity of data in the event system are obtained. |
