Patent ID: 8255067

Claim:
A plant operation system comprising: a plant operation control system that includes a first plurality of operation devices for operating a plurality of plant apparatuses and outputs data on positions of the first plurality of operation devices; a backup plant operation control system that includes a second plurality of operation devices for operating the plurality of plant apparatuses and outputs data on positions of the second plurality of operation devices; a switching device that performs switching between the plant operation control system and the backup plant operation control system; and an operation device position monitoring apparatus that receives data, on positions of the first or the second plurality of operation devices outputted from the plant operation control system or the backup plant operation control system, respectively, and monitors statuses of the operation devices, wherein the operation device position monitoring apparatus includes a storage unit that stores data on positions of the first and the second plurality of operation devices, a display device that displays data on the positions stored in the storage unit, and a processing device that determines whether or not operation device position data from the plant operation control system is the same as operation device position data from the backup plant operation control system when the plant operation control system is replaced by the backup plant operation control system, and outputs a switching permission signal to the switching device in the case where the operation device position data from the plant operation control system and the operation device position data from the backup plant operation control system are the same as each other, said processing device further outputs to the display device a result of determination whether or not the operation device position data from the plant operation control system and the operation device position data from the backup plant operation control system are the same as each other, and the display device displays the result of determination.