METHOD AND APPARATUS FOR EMULATING A PROGRAMMABLE LOGIC CONTROLLER

摘要

The invention relates to a method for emulating a programmable logic controller by providing a computation device having an operating system that is inadequate in terms of a real-time demand made of the programmable logic controller, mapping a real period (tR) onto a virtual period (tv) using a predetermined function, predetermining a limit value (T) for the virtual period (tv) that is needed for emulating at least one program cycle of a program (12) of the programmable logic controller; emulating the at least one program cycle with the computation device, and checking the presence of a cycle time overshoot in the emulated program cycle on the basis of the limit value (T), wherein the real period (tR) is mapped onto the virtual period (tv) using an asymptotic function.