Abstract

The Acid solution formation plant consists of mainely two equipments centrifuge and vessel. Control system of plant includes contol of instruments associated with these two equipments. The process of acid formation is a batch process. This paper gives information about implementation of a batch control system for acid solution formation plant using APROL distributed control system (Linux based DCS). Plant runs in simulation mode as well as output on hardware I/O cards are fired. This paper includes the information about system hardware for distributed control System (DCS) workstation, hardware for controller, I/Os. Logics and algorithms applied for controlling a plant in auto mode, manual mode and safe mode by using IEC61131 languages such as Structured Text (ST), Cyclic Function Charts (CFC) and Sequential Function Charts (SFC) are discussed. The detailed display designed for controlling a plant by operator is described in the paper. The paper describes the PID control loops for temperature, density and flow control tuned by Zigler-Nichols closed loop tuning method. Parameter configuration for batch processes are discussed in this paper.

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