Translation validation for model-based code-generators for PLCs

The use of model-based code-generators for construction of controller software increases the reliability of the software in two ways: first, the models often can be checked for safety conditions. Second the use of code-generators prevents manual implementation faults. However, the reliability depends on the correctness of these code-generators, i.e., whether they really generate code that correctly implements the model. In this paper, we show how this correctness can be checked automatically for code-generators for PLCs.