Rockwell-automation 5370-CMPK Color CVIM Module MATH-PAK Manual de usuario descargar pdf (Pagina 61)

Chapter 4

Defining Formulas

4–46

• The REFERENCE (ideal or nominal) value is 1.

• WARNING RANGE – Low 0. High 2.

• FAULT RANGE – Low 0. High 2.

With the range limits set as shown above, the only acceptable formula result

is 1. If the formula result is not 1, the formula fails. Note that in this case

WARNING RANGE limits are the same as the FAULT RANGE limits.

Figure 4.24 Example: Formula with conditional operation for comparing gage results

GAGE1 > GAGE2

Assigning Range Limits to Results Output Lines

As with range limits for gages and windows, you can assign outputs to the

range limits you set for formulas. To assign a formula range limit to a

Result output line:

• Pick the Output box under the FAULT RANGE or WARNING RANGE

heading, as appropriate. The USAGE menu appears (see Figure 4.25,

4–47).

• Pick the appropriate Results box in the USAGE menu.

You can select outputs lines only if have been previously assigned to results.

For example, as shown in Figure 4.25, only output lines #1 and #2 are

enabled and available; they are the only lines with a Results assignment, in

this case. The other output lines are either assigned other functions or are not

used; thus, they are not available for range limit use. For information on

assigning functions to output lines, see Chapter 11, Discrete I/O Line

Configuration in the Color CVIM User’s Manual.

Remember, you can assign more than one range limit to a single Results

output line. For example, you might assign both the High and Low

WARNING RANGE limits to one Results output line, and assign both the

High and Low FAULT RANGE limits to a different Results output line.

Or, for example, you might assign the FAULT RANGE limits for several

different formulas to a single Results output, if this meets your application

requirements. In this case, the Results output would be activated if any one

of the assigned FAULT RANGE limits for any of the formulas were

exceeded.

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Rockwell-automation 5370-CMPK Color CVIM Module MATH-PAK Manual de usuario Pagina 61