Our diploma thesis deals with solving the problem of dry running of pumps. The problem is solvable by using variuos flowmeters, but the problem arises when the installation of such flowmeters is unsuitable or even impossible. There are also, several solutions available on the market, but they come at a high cost to the end-user. Therefore, we decided to find a solution within the framework of the logic controller program, which is programmed with the Step 7 software tool.
In the thesis we have illustrated the problem of dry running of pumps, as well as the possible solutions, including the current solution applied at Cinkarna Celje. We have presented and later realized the idea of solving the problem by using the Step 7 software tool. Beside the project engineering procedure we have also described all the applied equipment and presented the software performance. Finally we have described the software testing and presented the results and findings upon the conclusion of the project.