What are the meaning of limit switch action characteristics?

The operating characteristic meaning of limit switch

FP (free position) : the position of the drive rod when no external force is applied.

2 OP (motion orientation) : Apply external force to the drive rod, so that the movable contact has just reversed from the position of the free orientation.

③TTP (total stroke orientation) : the orientation when the drive rod reaches the stop gear of the drive rod.

④RP (back orientation) : reduce the external force on the driving rod, so that the movable contact has just reversed from the operating orientation to the position of the driving rod.

⑤OF (action force) : In order to move from the free position to the operating position of all the necessary force applied to the drive rod.

⑥RF (return force) : In order to move from the total travel position to the return position, it is necessary to apply the force on the drive rod.

7 PT (pre-travel) : drive rod from the free position to the movement of the movement of the interval or moving viewpoint.

OT(over travel) : the movement interval or moving viewpoint of the drive rod from the motion orientation to the total travel orientation.

⑨MD(differential travel) : the moving interval or moving viewpoint of the drive rod from the operating position to the returning position.

⑩TT(total stroke) : the driving rod from the free position to the total stroke position of the moving interval or moving viewpoint.