Epson C82305 - Manual (Page 16)

DATA ENTRY
This section gives a brief description of serial data
communication conditions and handshaking protocols
supported by the C82305 * /C82306 * interface card.
Serial data communications
The CL32305 * /C82306 * interface allows you to select
either RS-232D or 20 mA Current Loop signal levels;
but never both at the same time.
This interface card also provides for either DTR (Data
Terminal Ready) or X-on/X-off handshaking protocol.
About data entry
Transmitted data from a host computer is stored in your
printer’s internal buffer. (This interface card has no
buffer memory.) When this buffer becomes full, any
additional transmitted data cannot be accepted and
would be discarded. To prevent such data loss, special
handshaking protocols are provided to regulate the flow
of data transmission. The two protocols available on the
C82305 * /C82306 * interface card are DTR and X-on/X-off.
Note
When a parity error (if parity check is enabled), framing
error, or overrun error is detected in the data received,
data is ignored or an asterisk (*) is printed instead.
(Since the handling of communication errors depend on
your type of printer, refer to your printer’s
specifications for details.)
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