Rockwell-automation 5370-CMPK Color CVIM Module MATH-PAK Instrukcja Użytkownika Pobierz pdf (Strona 48)

Chapter 4

Defining Formulas

4–33

Example usage: The formula below finds the variance of the results from 6

gages:

VAR(GAGE1,GAGE2,GAGE3,GAGE4,GAGE5,GAGE6)

In this example, each of six gages is set for linear gaging, in order to measure

the distance between the center of two objects (see Figure 4.18). The

formula above provides the variance of the measurements of the six gages.

In this example, if the variance value is beyond an acceptable range, the part

is rejected.

Figure 4.18 Example application, using gages and the variance operator

Gages 1-6,

each measuring

distance between

the two objects of

the same color

XXX

Logical Operators

The logical operators, AND, OR, and NOT, perform the indicated logical

function, and return a logical (1 or 0) result. Generally, it makes sense to use

operands which are logical values (1 or 0), such as conditional operation

results, or tool pass/fail results. Nonetheless, you can use operands of any

value.

AND operator

The AND operator evaluates two operands as to whether or not each equals 0

(zero), and then provides either a 1 or 0 result, as follows:

1 result – Only if both operands are non-zero.

0 result – If either or both of the operands equals zero.

Format / Usage: In general, use two operands with the operator, placing the

AND operator in the formula between the two operands.

Example usage: This formula ANDs the pass/fail results from gages 1 and 2.

A pass condition yields a 1 result, a fail yields a 0 (zero) result. The formula

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 88 89

Brak uwag

Rockwell-automation 5370-CMPK Color CVIM Module MATH-PAK Instrukcja Użytkownika Strona 48