This paper describes a software simulator used in the development of control algorithms for the pulp cooking process. The laboratory-type simulator has been built up, based on the same control system hardware and software already installed in an industrial plant. The simulator itself emulates some operator control actions, the behavior of typical pulp cooking process variables and important signals from the process equipment. The simulation can be performed in real time or in two different accelerated modes. In this paper, the background of the simulator is also introduced and a discussion of advantages, based on experience, is attached at the end.
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