Redundant data processing system having two programmed logic con

Details Redundant data processing system having two programmed logic con Redundant data processing system having two programmed logic con

1997-12-05

2000-05-09

DeCady, Albert

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Plural processors

700 2, 700 82, G05B 1918, G05B 902

Patent

active

060616016

ABSTRACT:
A tandemized data processing system has a first and a second programmed logic controller and centralized governance for alternatively governing one controller in a master state, whilst allowing the other controller in a standby state. Each controller has a local powering facility and a local bus, and furthermore is attached via a respective bus interface element to a general bus provided with input/output subsystems. The system further has a high-speed serial link between the two controllers. In particular, each local bus has local communication facilities, for consistently enabling user interaction with the master controller.

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