Hi MountainHiker, Thank you for replying so quickly.
Now I am translating a lsit of these kinds of cautionary statements, so I have to assume the contents, boo-hoo-hoo...
But I have found the sentence using the word 'hardstop', which is used in the same meaning. 'The calculated scan top safe position is above the top hardstop. Verify the hardstop is calibrated
It seems to me that a hardstop is some kind of permanent safety device to keep a machine from being operated too far in one direction or another. For instance, the legpress machine in the weight training room has a steel pin which prevents the moveable plate from squishing the user if his feet slip-- the pin stops the plate at a certain minimal distance from the seated person.