What happens when a PL=0 tag is used?

• A. Momentary hesitation as current position is confirmed to the command position.
• B. Increases movement speed.
• C. Switches to a different path.
• D. Disables the step.

Answer: (D)

Understanding how step control works with tags is key here. The PL tag acts as a gate for a program step, telling the controller whether that step should run. When the PL value is set to zero, it signals that the step is disabled. In practice, the controller will bypass the actions defined in that step and move on to the next one, leaving the robot’s state unchanged for that moment unless the next step alters it. This zero value works as a clear disable flag, so it doesn’t cause a faster movement, a change in path, or a momentary hesitation—the step simply does not execute.