The theoretical stability analysis of mold level control system for slab continuous casting machine is presented in this thesis. In the procedure of analyzing the stability of the mold level control system, the PLC program written for the control system is studied first in order to obtain the mathematical model of a PID controller. Then the mathematical models of servo-amplifier, servo-valve, electro hydraulic system to the output of mold level are established. A simulative control system using Matlab software is constructed in accordance with these mathematical models so that not only the results of stability analysis can be verified but also the dynamic response of controlled system can be studied. Finally, the effects of some potential disturbance on system¡¦s dynamics, stability, and control accuracy are also analyzed.

The main aim of this thesis is to create a library in TwinCAT PLC for Beckhoff motion control without NC task. This library is targeted for less performance controllers. The next part deals with creating a PLC application for motion control with digital I/O variables or with serial line. A Windows application will be created to configure the main parameters of motion control in the PLC Application.

The thesis especially deals with creating a program for PLC to control a casting line. There is described configuration and the parameters setting of the PLC Simatic S7-300 from Siemens. The control application is created in the software tool STEP 7. Production, properties and parameters of plynosilicate are described in this work. Control of the casting line, the PLC program, the used sensors, the optimization of production per hour and mixing of cold and hot water is also described here.

The thesis deals with the design and development of control algorithms and visualization system for controlling of eccentric press and its implementation into the press line. As a control system a SIMATIC s7-300 is used and for visualization the touch panel MP370 is implemented. The first part of the thesis describes a technology of the press line. This is followed by the design of hardware equipment and specification of control units. The thesis also provides insight into the creation of PLC program and explanation of specific functions. Finally, the development of visualization of the machine and description of application windows are demonstrated in the present work.

The thesis deals with definition of safety, traceability systems, creation of PLC programs for testing device control system and creation of Operator panel software. The thesis is divided into the machine specification and description, OP function description including function keys and the description of the control system with samples of the completed PLC program. The PLC program is written in STL and FBD language in STEP7. The conclusion describes functionality of the device.