Advanced Functions › Introduction to Function Fields › Overview of Function Fields

Overview of Function Fields

Function fields are non-database fields that may be used in device designs and action diagrams. The same function field can be used in many different functions.

There are six types, or usages, of function fields. Four provide standard field-level functions: SUM, MIN, MAX, and CNT; two are user-defined and let you define your own function fields: USR and DRV.

Function field parameters specify which field values are to be passed into the function field at execution time and which field is to be returned from the function field as the result. All function fields with the exception of USR fields have one output parameter, the function field itself. The system-defined function fields have a single input parameter. Derived function fields, of usage DRV, are specified in the action diagram and can have up to nine input parameters.