Central programmable controller with fault processor

Details Central programmable controller with fault processor Central programmable controller with fault processor

G - Physics

05

B

342/21, 354/230

G05B 11/01 (2006.01) G05B 19/05 (2006.01) G06F 11/00 (2006.01) G06F 11/07 (2006.01)

Patent

CA 1067187

CENTRAL PROGRAMMABLE CONTROLLER WITH FAULT PROCESSOR Abstract of the Disclosure A programmable controller includes four remotely located input/output interface racks which are connected by cables to an I/O scanner circuit which is centrally located with the controller processor and memory. Input and output data is serially transmitted between the I/O scanner circuit and the interface racks, and fault processors are located therein to monitor the operation. The fault processors include fault tolerant detector circuits which ignore erroneous transmissions caused by industrial noise, but which initiate a shutdown process when malfunctions occur. The shutdown process is controlled by a programmable disab- ling circuit which is responsive to program instructions stored in the controller memory to allow independent, quasi- independent, or dependent operation of the machines con- nected to each of the four interface racks.

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