US 6,941,175 B2 · Method of operating an industrial controller

Abstract

Mechanisms for operating an industrial controller (S) equipped with a runtime system (RTS), in particular for production machines, which enable a user to wait in the program flow for any desired condition are provided, the program flow being immediately continued when the condition is satisfied and the program flow being stopped when the condition is not satisfied, until it is established that the condition has been satisfied, the priority of the checking for the condition being increased in comparison with the current task priority while waiting for the condition to be satisfied. When the condition has been satisfied, a defined program sequence is processed with high priority up to an explicit end, the old task priority being resumed after the explicit end of the program sequence.

Claims16

Dependent claims

A method of operating a programmed industrial controller equipped with a runtime system comprising a plurality of priority levels for a production machine comprising the steps of

executing a plurality of user tasks each comprising a program sequence for operating the production machine on a first priority level in a round robin fashion;
providing a check condition instruction for said tasks, wherein the occurrence of a check condition instruction in a first task initiates a checking for occurrence of a desired condition on a higher priority level wherein if the desired condition is not met, the execution of the current task is immediately stopped and execution is switched to the next task while said condition is concurrently checked, and a occurrence of said condition stops the
execution of any of said next tasks and switches execution back to said first task.

Dependencies are inferred from the claim text.

Method of operating an industrial controller

Life of this patent

Method of operating an industrial controller

Life of this patent

Abstract

Claims16