Enumerations overview

Enumerations are system objects that are defined as a variable data type consisting of a numeric value (called an ordinal value) and an associated text string. The process-connected device (PCD) and the

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Server communicate using the numeric ordinal value. The server then displays the ordinal value associated text string to the operator. Use enumerations to display meaningful text to an operator, instead of a number.

Enumeration sets contain groupings of related enumerations. The

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and the PCD create and maintain these default system enumeration sets:

The data type and the members of the YES_NO, MATERIALS, MATERIAL_CLASSES, or CONTAINERS system-maintained enumeration sets cannot change.

Create custom enumerations and enumeration sets within an area model.

Use negative ordinal as shown in this example.

The agitator in Premixer B (Unit #2) might use: