The DeltaV system enables you to create and maintain control strategies in small, modular components. These components are unique, named (tagged) control entities called modules. The concept of the module is fundamental to the DeltaV system. The module is the main building block for a system. Modules link the algorithms, displays, I/O, conditions, and other characteristics to the equipment. Depending on its type, a module can be composed of parameters, a history collection strategy, alarms, conditions, algorithms, and display elements. These items are bundled together logically as modules so that you can use them in your control strategy.
The following figure represents a module and some of its possible components.
DeltaV modules enable you to define control strategies and equipment control that match your plant and operating philosophy. You match the DeltaV control system to your application rather than forcing your application to comply to a rigid, predefined control system structure.