Rockwell-automation 5370-CMPK Color CVIM Module MATH-PAK Manuel d'utilisateur télécharger pdf (Page 60)

Chapter 4

Defining Formulas

4–45

Using the learn mode statistics: You can run a series of trial inspections,

using a representative sample of workpieces, with the Color CVIM module

in Learn mode, in order to accumulate a statistical basis for setting the

FAULT RANGE and WARNING RANGE limits. For more information on

the learn mode, refer to the Chapter 20 in the Color CVIM User’s Manual.

Example Range Limit Setting

Here is an example of setting the range limit values for a formula:

AVG(GAGE1, GAGE2, GAGE3)

which averages the values of three gages (see Figure 4.23), in relation to the

REFERENCE value:

• The REFERENCE (ideal or nominal) value is 15.000.

• WARNING RANGE – Low 14.800. High 15.200.

• FAULT RANGE – Low 14.600. High 15.400.

With the range limits set as shown above, if a formula result is outside either

WARNING RANGE limit (above 15.200 or below 14.800), but within the

FAULT RANGE limits, the formula will have a WARNING condition only.

If an inspection result is outside either FAULT RANGE limit (above 15.400

or below 14.6), the formula will have both a WARNING and a FAULT

condition.

Figure 4.23 Example: Range limits for linear gaging

A B

15 cm (Ideal)

Gages measure distance

from feature A to feature B

A B

Gage 1

Gage 2

Gage 3

Here is an example of setting the range limit values for a conditional

operation by a formula (see Figure 4.24, page 4–46), where the

REFERENCE value, 1, is the only acceptable value:

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 88 89

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Rockwell-automation 5370-CMPK Color CVIM Module MATH-PAK Manuel d'utilisateur Page 60