# Global object parameters

Global object parameters are an extension of existing parameters designed to be used primarily with global object faceplates. They provide the following enhancements to regular parameters:

- An optional description of the parameter that can include not only how the parameter is to be used, but also the type of tag expected to be assigned to the parameter
- The ability to assign a different parameter value to each instance of a reference global object that uses the parameter without breaking the links between the tags and expressions on the base global object.

Global Object Parameters are useful when more than one instance of a global object is used on a display. For example, a single display could contain two or more Logix_PIDE faceplates, each referencing a different PIDE in the controller.

Global object parameters are not passed to the reference objects at run time. You do not need to assign a parameter file or list from a graphic object. The placeholder is defined in the base object and the tag is specified in the reference object.

Tip: | Global object parameter definitions are created on base objects. Global object parameters are assigned on reference objects as parameter values. Global object parameters can be used wherever a regular parameter can be used. Global object parameters are not supported in the versions of FactoryTalk View Studio prior to 5.00.00.

## To use global object parameters

1. Create a base global object.
2. Define the parameter on a base global object.
3. Create a reference object linked to the base object created in Step 1.
4. Create one or more additional instances of the same reference objects.
5. Assign unique parameter values to each of the reference objects.

## See also

About global objects and global object displays

Create global objects

Edit a base object

Define global object parameters

Assign global object parameter values

Parameter file and parameter list

Create global objects

Assign global object parameter values

Define global object parameters