Changes made for Pathfinder 5226 controllers.

The Request Clamp Move Down output and Enable Clamp Move Down input were created to work with the FoldGuard laser system. The Request Clamp Move Down will send a signal to FoldGuard saying it wants to move the clamp down. FoldGuard will then process if the move will be safe and sends a signal to the Enable Clamp Move Down input of the controller. The controller will then turn on everything needed to move the clamp down. If the Enable Clamp Move Down input turns off during the move the controller will attempt to stop. For more information refer to:

SCN 3621 - 5223, 5225, 5226; Added Request Clamp Down Move Output SCN 3622 - 5223, 5225 5226; Added Enable Clamp Move Down Input

The way this was implemented though it seemed like the controller could possibly try to move the clamp down without doing the request. Because of this a last line of defense was added to make sure we are requesting and FoldGuard is giving permission. This fix ensures a proper handshake logic happens between the 5226 controller and the FoldGuard system.