Metrohm tiamo 1.3 Manual - Manual (Page 809)

Subwindow Titrants/Solutions 783
Port occupancy of dosing unit:
Valve disc
Rotating direction
descending, ascending, [automatic], not over
Specification of the rotating direction of the valve disk. automatic is the
rotating direction with the shortest way.
Not over
1, 2, 3, [4]
Here you can choose the protected port. The protected port is the one
which is not driven at during rotation.