Using Ideal Switch in Simpower Systems

Hello, I tried using the "ideal Switch" block in Simpowersystems. I conneceted it to a battery I coded a matlab function block with if commands to give instructions to the switch via the gate(which is a simulink in put signal) to toggel between off and on. But it does not work.

so see what I did.

in the matlab function block

i did if command as follows,

if u==1 y=0; else y=1; end

but when i pass "1" through it still outputs the voltage in the battery. I have the voltage measurement between the switch and the negative port of the battery. so I have a display attached to the voltage measurement.

Please assist me with this issue.

thanks.