Dear Students, 

You might be confused, when i started the HMI Simulation the bit M0.0 was SET initially automatically. It was because of a mistake while programming the HMI Screen (not shows in the video)

I accidentally wrote 'Event' for my 'Screen' to Set Bit M0.0 which was causing this bit to be ON. 
Kindly ignore that. Just follows the steps and your code will work as expected. 

Regards,

Rajvir