The thesis describes the control-monitoring system as a part of the production for wet grinding of calcium carbonate and transport routes to storage silos of the finished product. It describes the process of preparing the data for the calculation of the cost price of the material.
The process of grinding is supported by the slurry feeder, the lubrication unit of the reduction gear of the mill and the water cooling system of the mill motor. The process of transport to the silos for finished material comprises of homogenizing the material, filtering and cooling the material and transportation of the material to the silos. The concept of data preparation for cost price calculation comprises of preparing data at the control level, the transfer of data via OPC server in the MS SQL database, where data are available for calculation of cost price for the material.
At the control level I integrated mill for milling process and transport route at the existing control system. I also prepared data for calculation the cost price of the material. I used Siemens equipment CPU417 with dislocated units ET200M and ABB frequency converters via PROFIBUS communication and also I used CPU319 with dislocated units ET200M and power analyzer SIMEAS. The communication link is made via ETHERNET to the supervisory control system and OPC server. All units are connected to the main industrial ETHERNET switch. I used Simatic Step 7 software for programing the PLC. Supervisory control level is used for managing actuators, start and stop automatic procedures, managing alarms, logging data and overview of measurements. Presented in the thesis are basic building blocks, technology and controls, and integration into existing system. I used software Proficy HMI iFix 5.1.
Within the project I cooperated with the investor, with whom I negotiated the price, equipment and project implementation. I was supervising the work and schedule of subcontractors and eliminated the errors in the project. The challenge was integration of new lines at continuous production. Exact data for the calculation of the cost price of the material, taking into account each event occurring during the production, was very demanding.