Thats how Palettization robot works.
A1, A2, A3 and A6 are active and A5 is grayed out.
The Axis A5 moves in synchronization with Axis A2, A3 movements s.t. the flange is parallel to the ground/base plane.
The only time A5 gets active is when axis loses its synchronization and we need to bring the axis back to synchronization in T1 by moving the Axis A5 s.t. the axis back in synchronization.
This is identified by seeing the axis A5 getting grayed out.