- The best way to achieve this would be to create an 'open' PLU.

- This then allows you to enter any value into the PLU.
Example,
If the charge was 30p you would press 3 0 PLU BUTTON, and for £1.50 you would press 1 5 0 PLU BUTTON
- When you set the PLU up, to set the halo you need to select the dropdown to change from 'general Page' to 'POS Options'.

- Under the General section of the POS options you will find an option called HALO. This stands for High Amount Lock Out.

- The value you set in this box is the maximum that can be registered through the button. If you set 5, the maximum you could register is £5.00.