• $UserDefined Object

• The UserDefined object provides the basic functionality you need to develop an ArchestrA supervisory application. 
• You can configure Field Attributes as an Analog or Discrete type.
• The UserDefined object is an object that you can use to create customized objects. You can use the UserDefined object as a template, or as a container.
• As a "Template"
• Use the UserDefined object as a template containing Field Attributes associated to multiple variables in a system. In this case, the object provides a simple and manageable structure as all the variables are contained in the same object.
• For example, you might create a UserDefined object called “Tank” and configure Field Attributes that represent variables associated to the tank system.
• LT100 - Analog Field Attribute - Input from a level transmitter configured with options such as: Scaling, Limit alarms and Statistics (Min/Max/Avg).
• SW100a - Discrete Field Attribute - Input from a limit switch configured with options such as State Labels and State alarm.
• XV100a - Discrete Field Attribute - Input-Output to a solenoid valve configured with options such as State Labels, State alarm, and Statistics (Open/Close time).

• As a “Container”

• Use the UserDefined object as a “container” for other objects. An object relationship in which one object is comprised of other objects is called containment. Containment allows you to group various objects together to make complex objects.