F
UNCTION
G-13.mft MDB/S1
20
National Rejectors, Inc. GmbH, Buxtehude
Coin channels
The coin validator has 32 "memory slots" for coin acceptance which can be
assigned up to 32 different coin types or tokens. These "memory slots" are
termed coin channels. The acceptance band of a coin type/token is allocated
to a coin channel and the coin type/token is accepted in that channel.
In order to reject false coins reliably, frequently for one coin type, in addition to
the normal coin channel, channels with a narrow or even very narrow
acceptance band are set up (see section "Label" in Chap. 3 "Design"). The
limit values of these coin channels are closer to one another so that false coins
with similar measured values are rejected. Narrow and very narrow coin
channels, however, also possess a lower acceptance rate.
In addition, it is possible to allocate coins with different measured values but
identical coin values to different coin channels. This is how the coin validator
can, for example, accept old and new coins of the same type.
However, a coin channel is not only assigned the acceptance band of a coin
type but also other coin information which defines further processing of the
coin after its acceptance: e.g. coin value or sorting information for an
external sorting device.
Since in most cases the manufacturer’s customer-specific programming
does not take up all the coin channels, channels which are still vacant can
be assigned coin types and further information desired at any time using the
WinEMP PC configuration software or PalmEMP2. Existing configurations
can be changed.
The last eight coin channels 25 to 32 (or 9 to 16 with double block data-
management, see section "Single or double block data-management" in
this chapter) are intended to be used for the teach mode. In these coin
channels new coin types can also be taught without configuration software,
directly via the lower switching block on the coin validator; i.e. a coin channel
is re-assigned a coin type or also a token (see section "Teach mode" in
Chap. 6 "Operation").
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