ABSTRACT
Modern process control systems are used in industrial automation for ¶exibility, modularity, and reliability, employing state of the art technology based on mainly three concepts: distributed control system (DCS), programmable logic controller (PLC) and supervisory control and data acquisition (SCADA). This chapter deals with the design and implementation of a SCADA for a heating system in a power plant. The system employs Siemens equipment and the software “Process Control System 7” (PCS7) and it is used for reading data from over 1000 analog and digital sensors, display 34 synoptic images in a hierarchical structure, display events and alarms, command eld devices (pumps, valves, etc.), system diagnostics under a user permission concept. Also allows web-based monitoring and command via open link exchange for process control (OPC) and web server by using the existing communication infrastructure. Redundancy is present at the operation server level. The system is currently in use at COLTERM Thermal Power Plant South of Timisoara, Romania.
