For tailored advice and product selection or configuration assistance, please contact a sales representative. 23 Industrial Instrumentation and Process Control > DCS PlantPAx Distributed Control System Demonstrator PID Process Control and Control Strategies The Nerve Center of the Industry Designed for training purposes, the PlantPAx Distributed Control System (DCS) Demonstrator replicates a DCS showing real-life process applications across a wide range of industries, including water and wastewater, oil refining, petrochemical, and food processing. It conveys essential skills for instrumentation and process technicians and engineers learn who operate DCS systems, manage alarms, and install, configure, and troubleshoot equipment. A user guide introduces students to the configuration and use of instruments that control and monitor industrial processes, including temperature, pressure, flow, and level process variables. PID Control The demonstrator is configured to teach different types of PID process control and types of control strategies. Two level PID control loops work simultaneously to maintain a stable level in each column even when disturbance occurs. The PID level control loop of the large column works in Cascade mode with the flow rate and use a pneumatic control valve as the final element. A pressure control loop maintains a stable pressure at the inlet of the large column. The pressure control loop uses the centrifugal pump with an industrial variable frequency drive to maintain the desired pressure. Batch Sequencer The system also features a sequencer performing an automatic start-up sequence to facilitate operation. A batch sequencer allows fill-up of the small column with four different amounts of water. Running the batches allows students to see the impact on the process stability. For safety purposes and damage prevention, the system includes interlocks similar to the ones in the process industry. Industrial Communication Protocols The demonstrator uses four different communication protocols between smart devices and smart transmitters. The HART protocol enables communication between devices by superimposing digital signals on top of the existing 4-20 mA outputs. The FOUNDATION Fieldbus, Profibus PA and EtherNet/IP protocols work in the same manner as a Local Area Network (LAN) for smart devices. Each smart transmitter has the option to be configured manually or through a computer using either a DCS system or an optional configuration software. It is also possible to edit the HMI interface and the PLC program to change the control strategies using two optional software such as FactoryTalk Site Edition Studio and RSLogix 5000 Full Edition. → Video
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