Emerson Epsilon EP Drive 400518-01 Manual de instalación descargar pdf (Pagina 79)

Setting Up Parameters

Figure 62: User Variables View

The following parameters are part of the User Variable definition:

Name

This is a twelve-character string that allows the user to assign a descriptive name to the parameter. Spaces are not allowed

in the name of a user variable.

Decimal

This parameter defines the number of digits (up to 6) to be used after the decimal point for the specific variable. This is the

maximum resolution that the parameter will have.

Initial Value

This is the initial value of the user variable that will be used on power up. If the user variable has been configured as a Save

to NVM parameter, then the value in NVM will overwrite the initial value on power up.

Adding and Deleting Variables

The default number of variables is ten. To add more user variables, click on the up arrow next to the “Number of User

Variables” box on the User Variables view. The maximum number of user variables is 500.

Only the last variable in the list can be deleted. To delete the last variable, simple click on the down arrow next to the “Number

of User Variables” box.

User variables are all of a Global type, meaning that they can be accessed from any program.

Online Tab (not shown)

While online with the FM-3/4 or Epsilon EP-P, an online tab will be shown next to the Setup tab. This online tab will show

the current online value of each of the user variables.

Using Variables in a Program

Once setup, user variables can be used inside a program in calculations, motion profile setup, or any other user-desired

function. To access user variables, click on the Drag in Variables button in the user program toolbar. User Variables is a

branch in the Drag In Variables selection box.

User Bits View

User Bits act just like User Variables except that they allow the user to store bit level parameters rather than 32-bit parameters.

The user may customize each User Bit by giving it a Name and an Initial Value.

The Name for each bit may be up to 12 characters in length, and must start in an alpha character (non-numeric character).

Spaces are not available in the Name for a User Bit, however the underscore character ("_") may be used.

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Emerson Epsilon EP Drive 400518-01 Manual de instalación Pagina 79