VERFAHREN ZUR DURCHFÜHRUNG VON ONLINE-PROGRAMMÄNDERUNGEN AN EINEM AUTOMATISIERUNGSSYSTEM

摘要

The method involves loading new program parts into a CPU into which a currently running user program has been loaded, to provide a new user program. Switching is made to the new user program only after identification of no overloading of the CPU and after monitoring of processing of all program cycles of the new user program, for preventing overloading of the CPU. A negative acknowledgement is transmitted to an engineering system when overloading is identified, for signalizing a reverse-switching to the currently running user program.