Řízení distribuovaných systémů pomocí PLC

Abstract

This work is dealing with distributed system control. PLCs from ABB that are used are described here, as well as possibilities of their communication and their developing interface CODESYS. The Modbus protocol was used for communication between PLCs. The connection was realised via RS485 standard. In master PLC there is a program, which controls the model of an elevator. In slave PLCs there are programs for control of DC engine and compressed air system and the program which deals with drilling of printed circuit boards. There was also created an aplication for monitoring and control in Control Web 6. The communication between PLC and Control Web 6 was carried out via OPC protocol.