Patent ID: 8676353

Claim:
A control system including a first control device and at least two second control devices, which are each connected to a network, and control objects to be controlled different from each other, wherein each of the first control device and the at least two second control devices stores a control volume computation procedure for computing a control volume related to a pre-determined control on an object to be controlled by the first control device, wherein the first control device compares the control volume related to the pre-determined control computed on the basis of the control volume computation procedure stored in the first control device with the control volume related to the pre-determined control computed on the basis of the control volume computation procedure stored in one of the at least two second control devices, and if the respective compared control volumes are identical with each other, the first control device controls the object to be controlled by the first control device on the basis of the control volumes, and wherein if the respective compared control volumes are different from each other, the first control device stops the computation by the one second control device that computes the compared control volume, computes control volume related to the pre-determined control on the basis of the control volume computation procedure stored in the other second control device, compares control volume related to the pre-determined control computed on the basis of the control volume computation procedure stored in the first control device with control volume related to the pre-determined control computed by the other second control device, and controls the object to be controlled by the first control device on the basis of a comparison result.