Changes made for Pathfinder 5226 controllers.

What was wrong

When a part uses the gripper backstop (adjusted load, e.g. 1.97" offset), three problems could show up:

Starting a program on a regular bend step: after the sheet was gripped and the backstops retracted, the backgauge would freeze and the cycle would hang. This happened on machines that don't have the backstop-retracted limit switch wired — the controller was waiting forever for a switch that isn't there.

Starting on (or loading at) a shear step: the machine would load the sheet at the 5" minimum load position but then never move the backgauge to the actual programmed shear position.

Phantom regrip at the shear: right before the cut, the machine would open the gripper and "regrip" for no reason — even when every step in the part uses the same gripper offset. This was a bookkeeping bug: the shear step forgot to record the offset it was gripped at, so the controller thought the next step needed a different grip.

What was fixed (all in the BlackBox run logic, pending check-in)

The wait for the backstop-retracted switch is now skipped on machines where that input isn't configured. The shear step now positions the backgauge and tracks the gripper offset the same way bend steps always have. That fixes both the stuck-at-5" load and the pointless regrip. Fixed a lookup bug where the controller checked the wrong I/O table to decide if the machine has gripper backstops (four places). What to expect after the update

Starting a program on any step type with a backstop load: sheet loads against the backstop, backstops retract, backgauge moves to position, cycle continues — no hang. Load step ? shear step runs straight through with no extra gripper open/close. Machines with the backstop limit switches behave exactly as before.

Changes made for Pathfinder 5226 controllers.

To troubleshoot the Simantics drive I needed more prints. These will probably be temporary until working in the field.