Control modules are the basic control elements in a batch system. Each pump, valve, or control loop is controlled by a separate control module. Each module has a unique tag and all the information for a module can be accessed through its tag name. Depending on the type, a control module can be composed of parameters, history collection strategy, alarms, conditions, algorithms, and display elements.
Control module classes define the common properties of a group of control modules. You can further group control module classes into categories to help organize the classes for large systems.
Control modules can be created individually from scratch. They can also be created from templates that exist in the DeltaV Library or they can be created as instances of control module classes. In this tutorial, we will create two control module classes (for valves and tank level indicators) and then create control modules from the classes. To speed up the tutorial configuration, other control module class categories and classes have already been imported.