La Cultura Del Caffe Barista Milk Mate, Руководство пользователя

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Manual Barista Milk Mate 1.5
© La Cultura Del Caffè GesmbH
04.09.2015 Page 26 | 36
3.10.3.2 Serial interface
Use this to check the serial connection to the cash register.
If no cash register interface is configured the "State" is shown
as "Not used", colored grey. If a cash register interface is
configured, the text shown for the actual state is colored red,
orange or green (according to a traffic light):
State Description
Not used Serial interface type set to "none"
Not OK! Connection not established (no
cable connected or cable defective,
wrong baud rate, ...)
OK - Connected Connection established, dispensing
of a portion not possible
OK - Polling, No action Connection established, dispensing
of a portion not possible (e.g.
because no waiter logged in to the
cash register or no credit available
at the cash register)
OK - Polling, Ready Connection established, dispensing
of a portion possible
OK - Inquiry Connection established, at the
moment an inquiry is going on
Bytes received:
The sum of all received data bytes is displayed, regardless if
they were erroneous or not.
Byte errors - Parity, Framing, ...:
The amount of erroneously received data bytes is shown (the
sum of parity-, framing- and break-errors).
Byte errors - RxBuffer overflow:
The number of bytes NOT copied to the receive buffer (e.g.
because the system was overloaded) is shown.
Packets rcvd.:
Displays the sum of all correctly received data packets
(completed error-free telegrams).
Packet errors - Checksum wrong:
Shows the amount of received data packets with wrong
checksum. Such data packets are discarded.
All counters listed above are reset to zero with every power-up
cycle of the device and if a parameter of the serial interface (like
the baud rate) is changed while the type of the serial interface is
not set to "none".
The error counters (counters for "Byte errors" or for "Packet
errors") should stay below 0.1‰ (100ppm) of the according
receive counters. So, e.g. per 10000 received packets only one
error "Checksum wrong" should occur.
If the error rate is higher than that it is likely that the data cable
is too long or that external disturbances occur during
communications, like electromagnetic disruption. In such cases
a reduction of the baud rate might help, also the data cable
should always be kept as short as possible!