Automated Model Based Application Test for PLC Open Loop Control Software Based on UML

The increasing complexity in the development of open loop control software demands new comprehensive methods and an approach for automated testing to ensure a requested level of quality at high efficiency. In this article a model based approach for test case generation using UML sequence diagrams and a universal test system architecture are presented. For the generation of executable test cases out of a model, a semantic adaption of UML sequence diagrams to the cyclic execution logic is presented. An example is used to demonstrate the simplicity of creation, execution and reporting of test cases using the presented approach.