Industrial complex multiprocessor control system - uses microprocessor to detect and correct system fault by modifying configuration

摘要

The control system has at least two central processors and a number of sensors coupled to the mfg. process connected to the input/output circuits for the processors. The input/output circuits are coupled to the processors via respective switching devices. A microprocessor responds to a fault in the control system and allows the configuration to modified to correct the detected fault with min. interruption of the mfg. process. The control system is put into hold when the integrity of the central processors is being checked by the microprocessor and during any subsequent restructuring of the system configuration. the system is reactivated after reconfiguration, and the microprocessor is returned to a monitoring phase.