Xante Accel a Writer 812, Руководство пользователя

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__________________________________________ Installation 2-29
Flow Control
Flow control is how the printer signals the host that the printer is
ready to accept data. The Accel-a-Writer 812 supports both
XON/XOFF (software) and DTR/DSR (hardware) flow control. The
printer’s factory default is XON/XOFF.
It is very important for both the host computer and printer to agree
on flow control. Incorrect flow control causes erratic serial printing.
You can check and set the flow control through the printer’s front
panel or use the procedure in “Changing Serial Communication
Settings” later in this chapter. See chapter 5, “Configuration,” for
front panel setup information.
Parity
Parity is a grouping of data bits into a uniform size. If some data is
lost or damaged in transmission, chances are high that it will affect
the size of a group, providing a warning of transmission errors. Your
Accel-a-Writer 812 supports five parity settings, None, Even, Odd,
Mark, and Space. The printer’s factory default is None. The
PostScript command “setdevparams” defines the parity of the serial
channel for PostScript Level 2.
Changing Serial Communication Settings
The easiest way to change serial communications is to use the printer
front panel. See “Selecting Menu Options” in chapter 5 for details.
You can also change settings by creating a PostScript file and
sending it to the printer. This is handy if you are networked to a
printer away from your host. The following “text only” sample file
changes the serial channel to 9600 baud, XON/XOFF, and None
parity.
true 0 startjob pop
(%Serial%) <</Baud 9600 /Parity /None
/FlowControl /XonXoff>>
setdevparams
Now your printer and host are connected. If you are connecting an
optional hard disk, skip to “Connecting a Hard Disk.” If not, skip to
chapter 4, “PC Setup.”