S88 Specs, Part 2 of 3: System Modeling Under S88 Standard
After reviewing part one of this three-part series, you now have a conceptual understanding of the S88 standard and its applications. If you haven’t yet read the first part of this series, check out S88 Specs, Part 1 of 3: An Introduction to the S88 Standard. Illustrating the S88 Standard in Application Understanding the S88 standard is only a piece of the puzzle. It can be difficult to fully grasp its implementation in process. Having a visual representation of a system utilizing Batch Control in manufacturing can add the next piece. In this article, we discuss System Modeling under the S88 standard covering the Process, Physical and Procedural Control models, and how the combination of these models enables effective control, monitoring and automation of the process. Control System Modeling Under the S88 Standard Modelling is best illustrated using a simple example such as a manufacturing plant with three process trains. Each train is intended to support the same set of three units with each unit of the same type supporting the same set of actions. Variations in terms of size and output are permitted. In this example, assume each train consist of a reactor, filter and recovery vessel. Process Model The process model in the S88 standard serves as a means of organization of the processing activities that are performed by the system i.e. process. The process is achieved using the physical equipment defined in the physical model and the recipes defined in the procedural control model. Fig. 1 Process Model Here we could envision supplying ingredients, and reagents or solvents to the reactor, followed by chemical reaction and transfer of the product to the filter. The filter separates the product from the waste and transfers the waste for disposal recycling to the recovery vessel. Physical Model The physical model in … Continued