Test Method of Real-Time Performance for OpenPLC Runtime

A PLC is an example of a real-time system since output results must be produced in response to input conditions within a limited time, otherwise, unintended operation will occur.

Cyclictest is used to test the real-time performance at the system level, and here the real-time performance of OpenPLC running needs to be analyzed. Therefore, the real-time performance of OpenPLC during operation is measured by the delay between input and output signals and the minimum scanning time.