Hi,

VR0 and VR1 is nothing but variable resister.

It will provide 0 to 255 value in particular data register.

For example, If you want to use VR0 then first you have to activate the bit M1178.

After that if you rotate that switch then you will get value in data register D1178.

You can use that value in the program. Simply I can say you can varies timer value using instruction T0 D1178 , like that..It’s depend on programmer how they use it for different purpose..

Thank You…Keep sharing ..If you like this forum..