Allen-Bradley 1747-PBASE, Руководство по программированию

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Publication 1746-PM001A-US-P
Communicating with the Module 9-13
14. Move the cursor down to anywhere on the line
next x
and then press [
F4
].
This causes the program to execute until it reaches the line you marked (
next
x
in this case). The Terminal mode screen appears, and the executing program
prompts you to enter a number.
15. Type the number
3
and press
[Enter]
. The Debugger screen returns, the line
next x
is highlighted, the value for
x
in the watch window is
1
, and the value
for
y
is
3
. You are stopped during program execution at the first encounter of
the line
next x
.
16. Press [
F4
] again. This time
x
is
2
. Continue pressing [
F4
] until you fall through
the for/next loop, get the number is odd message, and are prompted to enter
another number.
17. Type the number
6
and press
[Enter]
. The Debugger screen returns, the value
for
x
in the watch window is
1,
and the value for
y
is
6
.
18. Press [
F7
]. This traces you through the program one line at a time, flashing to
the Terminal mode screen to execute, and then returning to the debugger.
There you see the value for
x
changing each time the trace passes through the
for/next loop.
19. Keep pressing [
F7
] until you trace through the program to completion. Note
that the debugger is terminated and you are returned to Terminal mode.
20. Repeat steps 4 and 5 to return to the debugger.
21. Press [
F5
]. This temporarily returns you to the Terminal mode screen. Press
any key to bring the debugger back.
22. Press [
F6
]. You see a search screen identical to the one in the BASIC
Development Software. You can use this to search for any characters in your
program, such as the variables you want to enter into the watch window. To
cancel the search press [
Esc
].
23. Press [
F8
]. Your screen is now split into three sections, with the translated
BASIC program at the top, your .BDL file in the middle, and the watch
window at the bottom.
24. Press
[Tab]
to move the cursor to each of the three windows. You can now
select variables from either the .BAS file or the .BDL file appearing on the
screen, prior to pressing [
F2
] (to examine) or pressing [
F3
] (to watch).
25. Press [
F8
] again. Now only the BASIC program is on the screen with the watch
window. To return to the original debugger screen, press [
F8
] again.
26. Press [
F9
] to run the program to completion and exit the debugger. You also
can exit the debugger at any time by pressing [
Esc
] or [
F10
].