| 摘要 |
PROBLEM TO BE SOLVED: To provide an abnormality monitoring system and an abnormality monitoring method of duplex controllers by which mutual monitoring among controllers can be achieved without multiplexing a transmission path for mutual monitoring among controllers.SOLUTION: In an abnormality monitoring system 10 of duplex controllers, transmission between input/output devices 60A and 60B is performed so as to transmit state information of a controller 20A and the input/output device 60A in a main system to a controller 20B in a standby system via the input/output device 60B in the standby system, and the controller 20B in the standby system performs state estimation such as a halt of the controller device 20A in the main system. |
