56 Publication 1756-PM004C-EN-P - October 2009
Chapter 3 Force I/O
Enable Forces
For a force to take effect, you enable forces. You can only enable and disable
forces at the controller level.
• You can enable I/O forces and SFC forces separately or at the same
time.
• You cannot enable or disable forces for a specific module, tag collection,
or tag element.
When forces are in effect (enabled), a appears next to the forced element.
Disable or Remove a Force
To stop the effect of a force and let your project execute as programmed,
disable or remove the force.
• You can disable or remove I/O and SFC forces at the same time or
separately.
• Removing a force on an alias tag also removes the force on the base tag.
If you download a project that has forces enabled, the
programming software prompts you to enable or disable forces
after the download completes.
Changes to forces can cause unexpected machine motion
that could injure personnel. Before you disable or remove
forces, determine how the change will effect your machine
or process and keep personnel away from the
machine area.
state to which the element is
forced
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