Rockwell Automation Logix5000 Controllers I/O and Tag Data Programming Manual - Manual (Page 60)

Chapter 3 Force I/O
To force a Do this
BOOL value Right-click tag and then click Force On or Force Off.
Non-BOOL value In the Force Mask column for the tag, type the value that you want to force the tag.
Press Enter.
5. Verify that I/O forces are enabled (see step 1). If they are not, on the Menu
bar, click Logic > I/O Forcing > Enable All I/O Forces, and then click
Yes to confirm.
ATTENTION: Changes to forces can cause unexpected machine motion that could injure personnel. Before you
disable or remove forces, determine how the change affects your machine or process and keep personnel away
from the machine area.
This section describes how to remove and disable forces.
If you want to And Then
Stop an individual force Leave other forces enabled and in
effect
Remove an Individual Force
Stop all I/O forces but leave all SFC
forces active
Leave the I/O forces in the project Disable All I/O Forces
Remove the I/O forces from the project Remove All I/O Forces
Remove an individual force
ATTENTION: If you remove an individual force, forces remain in the enabled state and any new force
immediately takes effect.
ATTENTION: Before you remove a force, determine how the change affects your machine or process and keep
personnel away from the machine area.
1. Open the routine that contains the force that you want to remove.
2. Determine the language of the routine.
If Then
SFC Go to step 4.
Ladder logic Go to step 4.
Function block Go to step 3.
Structured text Go to step 3.
3. Right-click a tag that has the force and then click Monitor.
If necessary, expand the tag to show the value that is forced, for example,
BOOL value of a DINT tag.
Remove or disable forces
60 Rockwell Automation Publication 1756-PM004E-EN-P - October 2014