Electrolux EMP-800 Service Manual download pdf (Page 34)

Technical Manual EMP 8x0.00/04/13 v5 wh Münzprüfer Dietmar Trenner GmbH, Germany

Version 1.51

Page 34/42 subject to technical modification EMP8x0.00/04/13 v5

the power on Reset, because this information must be transferred first after the poll

command. There may not be enough time to do this if the coin selector has to be

instantly ready to accept coins.

A coin type command, which is sent from the machine controller to the coin

selector is stored in the EEPROM in this mode and therefore still valid after a

power on reset until the next coin type command is received.

3.3.4.2 Polling

The coin selector only turns itself off after accepting a coin and after the

information has been retrieved by the polling machine controller. However, the coin

selector will turn itself off after two seconds if this polling does not happen.

A special procedure must be followed to send a coin type command to a battery

operated coin selector. The coin type command must be sent after switching the

device on and before a polling command, because otherwise the coin selector will

turn itself off first.

As an alternative, the polling can be sent, but without responding to the ACK sent

by the coin selector. The coin selector will also not turn off in this case, and so the

coin type command can still be received. In this case the polling can be sent again,

and the coin selector will respond as it did the previous time. This second polling

must then be responded to with the ACK, at which point the coin selector will turn

itself off.

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Electrolux EMP-800 Service Manual Page 34