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F3 – keyboard read/laser – Rockwell Automation 2708-NAG Application Generation Software User Manual

Page 15

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Chapter 3
Using Application Generator

3 – 5

F3

– Keyboard Read/Laser

The Keyboard Read menu is used to read fields and characters from the
keyboard. When you chose one of these attributes a message is displayed on
the next to last line of the CRT. Then the attribute is added to the read
statement in the program. When

F3

is pressed the Main Operations Menu is

replaced with these options:

Figure 3.4
AG Read From Keyboard/Laser Menu

Note: Since there are many options that can be selected for reading, you will
have to press

[ENTER]

until the Main Operations Menu is shown in order to

store a READ operation. Watch the help line at the bottom of your computer
screen.

If you choose

F2 – READ A SINGLE KEYSTROKE

then the key number

will be placed into the input variable. An example use of this choice would
be in a Time & Attendance program when you need to know if the employee
is checking IN or OUT; the entry could be the single keystroke of the (IN) or
(OUT) key. Some of the more important ·numbers are:

F1

= 225

F6

= 230

[ENTER]

= 13

EXIT = 159

F2

= 226

F7

= 231

IN = 43
UP = 24

F3

= 227

F8

= 232

OUT = 45
LEFT = 8

F4

= 228

F9

= 233

CLEAR = 127
DOWN = 25

F5

= 229

F1

0 = 234

SPACE = 32
RIGHT = 26

The

F3 – READ NUMBER

will create a numeric field. The input will be

converted into a number.

!

ATTENTION: The limits of this numeric field are +2, 147, 483,
647 maximum to – 2, 147, 483, 647 minimum. If a value is
entered that is outside of this range the number will overflow to
an incorrect value. If very large positive or negative numbers are
expected, then set an input range to the above limits (see

F7

option).