The content of the thesis is to familiarize students with module PLC Siemens LOGO! and its practical use in teaching courses in the subjects as automation, electro-nics and mechatronics at vocational secondary schools. The content is focused on the basic description of the development and graphical environment and its use in practical problems solving. In the practical part of the proposals there are worksheets for pupils with the design of pupils´ simple tasks. After studying this text and the compilation of practical problems, the student should be capable of independent operation with module PLC Siemens LOGO! and implementation of complex applications.