Good Morning, I'm a Venezuelan Student and I've a problem with Chemcad.

I Need to simulate an on/off (bang/bang, all/nothing, 0/100) Controller and a pair of pumps.

I'm using PID controllers without a problem, but I cant't figure how I locate/use the on/off controller in Chemcad.

The Chemcad version is the 6.0.1

Thanks, and excuse me for my poor english.
Julieta.