3 Other operating modes of the G-18.mft - NRI

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DESIGN G-18.mft with vending machine control system Pilot lights (vending machine door) The two pilot lights (LEDs) controlled via the additional PCB (connector 7, Fig. 1c) in the vending machine door are supposed to make it easier for the customer to operate the vending machine in normal operation. However, these LEDs also tell the service technician that there is a malfunction and what kind of malfunction it is. Accordingly, the green LED is used during a correct selling sequence and the red LED in the event of a malfunction or an error during the selling sequence (cp. also section "Status and error messages of the pilot lights in the machine door" in Chap. 8 "Maintenance and service"): green LED flashes, as soon as the inserted credit is sufficient for a purchase: • in case of setting "exact price“, as soon as a set price is reached and the respective chute is not empty • in case of setting "overpay“, as soon as the lowest set price is reached red LED flashes, when coins are inserted although the acceptance of coins is inhibited, because: • credit has already reached the highest set price • all chutes are empty or defective • malfunction in the escrow red LED flashes, when a selection button is pressed, because: • in case of setting "exact price", credit is not equal to price • in case of setting "overpay", credit is less than the price of the selected product • chute of the selected product is empty or defective green and red LED flash alternately whenever the coin validator is not in the normal operating mode but in the service mode instead, so that no coins can be accepted in order to generate a credit (e.g. in the test mode or during the price-setting operation). 22 National Rejectors, Inc. GmbH, Buxtehude
G-18.mft with vending machine control system FUNCTIONS 5 Functions This chapter describes the functions of the coin validator: • Coin acceptance • Coin channels and memory blocks • Accepted coin sensors • Prices • Control of the vending machine functions • "Battery empty" detection • Inhibiting of specific coin types • Teach mode (optional) • Communication with MDB periphery (optional) Only the functions will be described in this chapter. To find out how to change adjustable functions, refer to Chap. 7 "Operation" regarding settings made directly on the changer, and refer to the separate instructions regarding settings made using the configuration software WinEMP or PalmEMP (cp. also Chap. 9 "Which functions can be set using WinEMP/PalmEMP?"). Coin acceptance A coin inserted into the coin validator initially runs past inductive and optical sensors for the purpose of an inspection in order to measure its coin properties such as the alloy, diameter, mass and minting. An upper limit and a lower limit are stored for each programmed coin type, a so-called acceptance band, so that the coin validator knows whether to accept a coin or not. If the determined measured values of the inserted coin are beyond the acceptance band, the coin detected as being a false coin exits the coin validator via the coin return area. Otherwise, the acceptance gate opens, and after passing the accepted coin sensors, the coin is initially directed into the escrow of the vending machine. The acceptance bands are programmed by the manufacturer according to customer specifications, but they can be changed using the configuration software (see Chap. 9 "Which functions can be set using the WinEMP/ PalmEMP?"). National Rejectors, Inc. GmbH, Buxtehude 23
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3 Other operating modes of the G-18.mft - NRI

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