How to control simscape ball valve block

What input should be given to "S" port of smiscape ball valve bolck to make it open and close depending on water levels in the tanks.

Answer 1

[Yifeng Tang]

Looks like an earlier version of question:

https://www.mathworks.com/matlabcentral/answers/502708-control-of-ball-valve?s_tid=srchtitle