Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 User Manual

Page 228

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Program Troubleshooting

Chapter 19

19-7

Forced Address Display

The industrial terminal displays a complete lists of bit addresses that are
forced on or off by pressing:

[SEARCH][FORCE ON]
[SEARCH][FORCE OFF]

If all bits forced on or off cannot be displayed at one time, use the
[SHIFT][] and [SHIFT][] keys to display additional forced bits.

Press [CANCEL COMMAND] to terminate this display.

You can use the temporary end instruction to test or debug a program up to
the point where it is inserted. The temporary end instruction acts as a
program boundary because instructions below it in user program are not
scanned or operated upon. Instead, the processor immediately scans the
I/O image table followed by user program from the first instruction to the
temporary end instruction.

When you insert the temporary end instruction, the rungs below it,
although visible and accessible, are not scanned. You can edit their
content, if desired. The displayed section of user program made inactive
by the temporary end instruction contains the message “INACTIVE
AREA” in the lower right-hand corner of the screen.

Inserting a Temporary End Instruction

Keystrokes: You insert the temporary end instruction in either of
two ways:

First Method
1.

Cursor to the last rung of the main program to be kept active.

2.

Position the cursor on the output instruction.

3.

Press [INSERT][T.END]

Second Method
1.

Cursor to the first rung of the main program to be made inactive.

2.

Position the cursor on the first instruction in the rung.

3.

Press [INSERT][ ] [T.END]

Temporary End Instruction

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