Operating mode switching method for process control switches between solo operating mode and redundant control mode employing back-up central processing unit

摘要

The method allows a process control to be switched between a solo operating mode with a central processing unit (CPU1) and a redundant control mode with at least one further central processing unit (CPU2), by comparing a stored value for a data block with the new value for the latter, for indicating a variation, the data block transferred to the further central processing unit when a variation is indicated. An Independent claim for a device for execution of a process control with at least 2 central processing units is also included.