DPI stands for Decimal point input. This means from your offset page instead of entering .0005″ to make an offset you can enter 5 input plus and it will add .0005″ to your offset page.
In order to turn this option in you need to go to parameter 3401 bit 0 and change the value to a 0 (zero) . You will need to change this on both the main and the sub side.
Troubleshooting: The machine does not accept my offset value entered.