SEM W25T, Руководство по программированию

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Operating principle
The W25T Controller delivers water in two different manners: 1- On a time basis; 2
- On a volume basis.
The time basis is used when the flow of water is continuous and with steady water
pressure. If the flow is not continuous or if the water pressure is not steady, this
will result in inconsistent quantity of water from one delivery to the other. The
only way to ensure a steady volume of water from one delivery to the other is by
using a water flow meter.
The W25T allows the use of the following payment peripherals: Coin acceptor only
(no change given back), coin changer (from a 3-tube up to a 6-tube of change), bill
acceptor, one or two cashless devices (credit/debit, prepaid, RFID, on-line-off-line,
etc.).
The W25T offers 4 different preset water quantities at four different prices. Both
the water level and the price are of course programmable. Once you have inserted
sufficient credit, you can select the format of container you wish to fill. If the vend
price of the chosen format is higher than the amount inserted, the green Start but-
ton will stay OFF. If the vend price of the chosen format is equal or lower than the
amount inserted, the green Start button will activate waiting for the customer to
start filling the container. Once the vend process
starts, the W25T immediately starts giving change
back if needed or concludes the transaction to the
card reader, no matter how long it takes to fill the
container.
The large LCD display prompts a multitude of mes-
sages to the customer such as the vend price, format
chosen, low-change situation, and much more.