change the contents of a cell by means of a formula

[Justme47]

In cell A1 is a formula which gives output in A1.
When the shown output of cell A1 is greater than a specified value, say 5, then the contents of Cell A2 should show the output of cell A1. (5)
I tried to achieve this by means of a function but no succes.
Can you help me to solve this?

[mudraker]

Place this formula in A2 - It displays nothing if value is 5 or less
=IF(A1>5,A1,"")

[Justme47]

Thank you for your help.

The problem is however a little more complex:

The formula in Cell A1 shows the actual max allowed range of a graph. This range is a part of the graph.
Cell A2 is the linked cell of a scrollbar .
This scrollbar is also active on this graph but controls the complete graph.
When the value of cell A2, the linked cell, is greater than the max value of the allowed range, the display of the graph is no longer correct.

My idea was to change the value of the linked cell A2 to the max value shown in A1 in order to get the graph again within its limits.
But I do not know how to achieve this.