Chapter 6 — Setting Up the Printer
54 EasyCoder PF2i Bar Code Label Printer User’s Guide (Fingerprint Version)
RTS high indicates that the transmitting unit is able to receive
characters. RTS low indicates that the receive buffer is filled to
75% (see XON/XOFF).
CTS high indicates that the unit transmitting the CTS signal is
ready to receive data. CTS low indicates that the receive buffer is
full (see XON/XOFF). In some computer programs, for example
MS Windows Terminal, RTS/CTS is designated “Hardware.”
ENQ/ACK is a protocol where the communication is controlled
by the control characters ENQ (ASCII 05 dec.) and ACK (ASCII
06 dec.) being transmitted on the same line as the data. The
sending unit transmits ENQ at regular intervals. If the response
ACK is not received, the transmission is held up awaiting an
ACK character from the receiving unit. By default, ENQ/ACK is
disabled.
XON/XOFF is a protocol where the communication is
controlled by the control characters XON (ASCII 17 dec.) and
XOFF (ASCII 19 dec.) being transmitted on the same line as the
data. XON/XOFF can be enabled/disabled separately for data
received from the host by the printer (printer sends XON/XOFF)
and for data transmitted to the host from the printer (host sends
XON/XOFF).
XOFF is sent from the printer when its receive buffer is filled to
75%, and the transmission from the host is held, waiting for an
XON character. When enough data have been processed so the
receive buffer is filled only to 50%, the printer sends an XON
character and the host resumes transmitting data. The same
principles apply to XON/XOFF sent by the host, even if the
percentage figure may differ. By default, XON/XOFF is disabled
for data in both directions.
New Line
Selects the character(s) transmitted from the printer to specify the
switching to a new line. There are three options:
• CR/LF ASCII 13 + 10 dec. (default)
• LF ASCII 10 dec.
• CR ASCII 13 dec.
Receive Buffer
The receive buffer stores the input data before processing.
Default size is 1024 bytes.
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