Rockwell Automation 2708-NAG Application Generation Software - Manual (Page 29)

Chapter 3
Using Application Generator
3 – 19
F8 – IF (Conditional)
An IF statement is another way of changing the order or program execution.
It allows you to GOTO a statement IF a variable is in some state.
When F8 – IF is chosen you are asked for the Variable to compare. Then the
Main Operations Menu is replaced with this sub-menu:
Figure 3.20
AG Conditionals (IF) Menu
In F2 through F5 , you are prompted with “Value (text in quotes) or Variable
name to compare : ”. For example, you might have entered IN as the variable
to compare immediately after pressing F8 , then after you chose F4 (If less
than ..) you might enter 9999, if you want to be sure the number that was
input into the IN variable was less than 9999. Then you are prompted to enter
the GOTO statement number if your compare is true. You can enter the
number or use the up/down arrows to find the statement and press enter.
In F6 and F7 , you are prompted to enter both the lower limit and the upper
limit of the range. Then you are prompted to enter the GOTO statement
number if your compare is true. You can enter the number or use the
up/down arrows to find the statement and press enter.
In F8 and F9 the ‘starts with’ and ‘ends with’ are used to branch (GOTO) if
the variable starts or ends with some piece of text. You will usually type
quotation marks (“) in front of the text being checked.
After you have entered the compare data, (text as above, a numeric, or
another variable), you are prompted to enter the GOTO statement number if
your compare is true. You can enter the number or use the up/down arrows to
find the statement and press
[ENTER] .