Patent ID: 8850099

Claim:
A redundant data bus system comprising: a controller; a first microcomputer; a first data bus, over which the controller and the first microcomputer are connected via a first driver installed between the controller and the first microcomputer to form a first transmission path, along which data is transmitted/received between the controller and the first microcomputer via the first driver on the first data bus; and a second data bus, over which the controller and the first microcomputer are connected via a second driver installed between the controller and the first microcomputer to form a second transmission path, along which data is transmitted/received between the controller and the first microcomputer through the second driver on the second data bus; the controller being configured to transmit, to the first microcomputer via the first transmission path or the second transmission path, the data including an operation check signal, and to receive, from the first microcomputer via the first transmission path or the second transmission path, the data including a response signal, and the controller being further configured to make a switch to one of the first and second transmission paths through which the response signal has been transmitted when reception of the response signal is interrupted.