| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic control system, a contact information gathering and distributing device, and a slave station of the automatic control system that can control a control object by synchronizing it while preventing wasteful signal processing.SOLUTION: An automatic control system comprises: a slave station 3 connected with a control object 2; a master station 5 connected with a control unit 4 controlling the control object 2; a contact information gathering and distributing device 6 that gathers and distributing a series of contact information communicated in a prescribed communication period T lying between the master station 5 and the slave station 3; and a plurality of communication lines 7, 8 connecting between the master station 5 and the slave station 3 via at least one contact information gathering and distributing device 6. The contact information gathering and distributing device 6 gathers and distributes a series of contact information in synchronization with all the communication lines 7, 8. The control unit 4 compares contact information gathered via the contact information gathering and distributing device 6 with past contact information gathered in a previous communication period, and regards the contact information as true when they agree, and performs control by this true contact information. |
