Need a help for FC Step 7 s7 300 LADDER logic

Excuse me.

I have got some problems for FC Step 7 s7 300 LAD,

When FC is running, ex: Q0.0 = 1;

then I break the power flow this FC, but Q0.0 still = 1.

so how can I do to turn off All components in this FC while i break it? ( its mean Q0.0 change 1 to 0 )