Batch-based design

The DeltaV system incorporates batch processing by following ISA S88.01 and IEC 61131-3 standards.

For example, an instance of a unit class in the DeltaV system is a unit module. An equipment module in the DeltaV software is a module where several devices are involved with the control of a single control parameter through a function block diagram, an SFC, or a unit module and its corresponding unit phase. Examples of an equipment module include an agitator and corresponding level limit switches or a grouping of discrete and analog values that provide temperature controls on a jacketed reactor.

A control module, in the DeltaV system, is a DeltaV module that uses one of the following algorithm types; a function block diagram, an SFC, a command-driven algorithm, or a state-driven algorithm, to affect the control of one device.

Incorporating the S88 standard in this model provides the ability to adhere to the S88 standard. The DeltaV system applies the user's definition of the S88 standard with respect to control modules, equipment modules, and unit modules.

The DeltaV Batch subsystem uses both top-down and bottom-up design principles in configuration. The following figure shows a graphical representation of this design process.

Top-Down, Bottom-Up Design for DeltaV Batch

Top-down design is used both in configuring of the physical pieces of batch processing (units and areas) and the logical groupings of those physical pieces (process cells, unit classes). Bottom-up design is used for all levels of the recipe (phases, operations, unit procedures, and procedures).