Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 167)

Troubleshooting Aids
Chapter 13
13Ć3
You can remove all force on or all force off functions at once in ladder diagram
display by pressing either of the following key sequences:
[FORCE ON] [CLEAR MEMORY]
[FORCE OFF] [CLEAR MEMORY]
The on or off status of a forced bit will appear beneath the bit instruction in the
rung.
In all processor modes, a “FORCED I/O” message is displayed near the bottom
of the screen when bits are forced on or off. In every mode except the program
mode, the forced status “ON” or “OFF” is displayed below each forced
instruction.
NOTE: The on or off status of latch/unlatch instructions is also displayed
below the instruction. However, this is displayed only in program mode.
All force functions are cleared when you:
Disconnect the power cable or communications cable of the industrial
terminal or processor.
Lose AC power throughout your plant.
Press [MODE SELECT].
WARNING: When an energized output is being forced off, keep
personnel away from the machine area. Accidental removal of
force functions will instantly turn on the output device. Injury to
personnel near the machine could result.
The industrial terminal displays a complete list of bit addresses that are forced
on or off by pressing:
[SEARCH] [FORCE ON]
[SEARCH] [FORCE OFF]
If all the 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.