Peripheral unit for stored programmable control system, has central processing unit having stored program and expiration system for processor-controlled expiration of stored program

摘要

The peripheral unit (IO) has a central processing unit (CPU) having a stored program and an expiration system for processor-controlled expiration of stored program. Incidence controlling start or stop switches are provided for connected current supplies (U-int,U-ext) within the peripheral unit from stored program of the central processing unit over a bus system (BS).