ISA-88.00.02:2001

This Part 2 standard on Batch Control defines data models that describe batch control as applied in the process industries, data structures for facilitating communications within and between batch control implementations, and language guidelines for representing recipes. Purpose:ANSI/ISA-88.01-1995, Batch Control Part 1: Models and Terminology (referred to as Part 1 throughout this standard), provides models and terminology applicable to batch control. This standard (referred to as Part 2 throughout the standard) addresses data structures and guidelines for languages. Data structures are addressed by the data model that is defined in clause 4 that more precisely identifies objects and relationships that are addressed by models and concepts of Part 1. Data structures are also addressed by relational tables for information exchange that are defined in clause 5. Languages are addressed by a recipe depiction methodology that is defined in clause 6.The intended use of the data model is to provide a starting point for developing interface specifications for software components that address any subset of the Part 1 standard. The data model addresses all of the Part 1 standard as an integrated object model, but it does not presume or preclude any specific system architecture or information exchange. The model does not assume any specific division of functionality between systems.A specific method for the exchange of selected data is defined in clause 5. Relational tables are used as the information exchange method because, within the bounds of the information treated, they
utilize broadly available technologies;
are amenable to translation to other technologies;
are adequate; and
are consistent with other sections of the standard.
Multiple methods of information transfer have not been defined, nor has there been an attempt to identify all information that might be exchanged. In the future, additional methods may be defined to provide alternate ways to exchange data.Clause 6 defines the symbols and rules for a graphical language that can be used to depict recipes. Recipes are the central feature of batch control, and they can address a wide range of complexity, but there is no one depiction that is ideal for all circumstances. A simple table, for example, might be the most appropriate recipe form for simple cases. This standard specifies a method for depiction of master and control recipe procedures that can be applied over a broader range of complexity. Although this standard is intended primarily for batch processes, there may be considerable value for other types of processes.