Mid Sweden University

The objective of this thesis project is to apply programming standardization to a practical PLC project. The practical programming task was carried out at ÅF Sundsvall. Two industry standards were chosen for analysis; IEC 61131-3 for PLC Programming, and SSG 5262 for HMI design. The project is programmed in TIA Portal V14, and hardware includes a Siemens 1200 series CPU, and TP700 Comfort HMI panel. The practical task involved in this project is to program and be able to simulate a sewage pump station. Both the PLC logic and HMI will use code which is scavenged from previous ÅF projects. This code was analyzed from a perspective of the chosen standards and certain incompatibilities were mentioned. In order for the code to satisfy the standards, modifcation was made to remedy the incompatibilities. Further, certain changes were made to the existing code in regards to general modernization. The station was successfully simulated based on the requirements placed on it and process information was presented in an efective manner.