Design and Implementation of Monitoring and Control of Ethernet TCP/IP based Distributed Control Systems
Project no. 1267 · Status: Kapanmış · 2018
Summary
Today, the requirement of the industry has shifted from conventional measurement and control to the acquisition, monitoring and control of these data via computers and programmable logic controllers (PLCs). In systems in distributed control architecture, data from processes and machines from remote points can be collected and processed via a control computer, monitored remotely, alarms and trends can be created and stored, reports can be created, and PLC control of solenoids, proportional valves, motors can be provided. In these systems with distributed control architecture, data transfer and control of technical personnel are provided by using industrial communication protocols between devices and control computer. In this project, communication between Ethernet-based Modbus TCP / IP protocol and SCADA server computer and PLC is provided, while Modbus RTU communication is carried out between PLC and AC motor drive at the device level. Data transfer between the SCADA server and the AC motor drive via Modbus TCP protocol was realized by establishing a connection with Ethernet Gateway Link150. In this project, data from temperature and level processes controlled by two PLCs operating locally were collected and transferred to the SCADA server, where necessary, proportional gain, integral and derivative times were entered from the user screen and processes were manually operated. Proportional, Integral, Derivative (PID) controlled both processes automatically perform the control function according to the PID parameters entered from the touch operator panel (Human Machine Interface – HMI), while all the parameters belonging to the control system on the designed HMI screen, alarms and trends can also be monitored locally. Keywords: Networked control systems, programmable controllers, supervisory control and data acquisition systems, Modbus TCP communication protocol, distributed control architecture