Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Redundant supervisory control system, and redundancy switching method of the same
An object is to provide a redundant supervisory control system and a redundancy switching method thereof. In the redundant supervisory control system, remote I/O apparatuses are less likely to be inaccessible, even in a case where failures occur in plural locations. Thus, the reliability of the system is enhanced. The redundant supervisory control system including a plurality of first loop interface units in each of a pair of controllers, second loop interface units, and communication cables each connecting the plurality of first and second loop interface units with one another in a circular loop. The redundant supervisory control system is configured by connecting the controllers and the remote I/O units to one another in a plurality of loop networks. In a case where abnormality in the loop networks is detected by use of received data in the networks, the first and second loop interface units that can perform normal reception are automatically selected.
Kabushiki Kaisha Toshiba
G
G05B
inventional
Makoto Jun Shinya Akira Hiroyuki Yuuji
Toko Takehara Kono Sawada Kusakabe Umeda