Rockwell Automation 5370-CMPK Color CVIM Module MATH-PAK - Manual (Page 52)

Chapter 4
Defining Formulas
4–37
current value of formula 4, then formula 4 is set to the current value of
window 3. The result of this shifting of window 3 results is that the formula
1 result equals the window 3 result from four inspections ago.
The fault range limit for formula 1, in this example, is set to the appropriate
parameters for window 3. The output of formula 2 can be assigned to a
results output and used to trigger a signal the event window 3 failure.
This application example is particularly useful where indexing of parts
occurs, and where the action taken on a part failure occurs further down the
line (in this example “further down” means “four triggers down”).
Once you have defined a formula’s contents, you can name the formula using
the
Set Name box on the Config. Results menu. Entering descriptive
names for formulas can be useful – during run mode, for example, formulas
can be displayed according to their pass/fail status. It may be easier, when a
formula is displayed, to identify a formula’s function if it has a name relating
to its content or functionality.
Default name: In case you do not name a formula, a default name is entered
automatically, when you define the formula. The default name for a formula
is F#, where # is the formula number.
Define formula first: The Set Name box for a selected formula is disabled
until the formula has been defined. Thus you cannot enter a formula name
until you enter a valid definition (see “Defining a Formula” in this chapter).
Figure 4.19 Using the keyboard to set the formula name
To enter a formula name:
•
Pick Set Name on the Config. Results menu. The keyboard appears
(see Figure 4.19).
Naming a Formula