Chapter 3:
Printer Menus and the Control Panel
3–75
DTR Function
continued...
Offline:
When this option is active, the DTR Line is used to signal only that the
printer is Online or Offline. Unlike the Busy option, the Offline option will not
interfere with operation of the Xon/Xoff Communication Protocol.
Power:
When this option is active, the DTR Line is used to signal the host that
the printer is powered up. This DTR Selection will not interfere with host recep-
tion of the Xoff/Xon Serial Protocol, because unlike the Busy selection, the DTR
Signal is not toggled at the same time as the Xoff Signal. When using this option,
the DTR Polarity parameter must be set to Actv Hi.
If your system is configured to use Xon/Xoff Protocol, using the Busy option above will cause interfer-
ence with printer to host communication. You may however, use the DTR Line to signal the host that
the printer is Offline or that the printer is powered up (Offline and Power options, respectively).
DTR Polarity
This parameter is used to set the DTR Signal polarity. Active Low is the default.
Busy Polarity
This parameter allows you to control the polarity of the Busy Signal. Active Low
is the default.
RTS Function
The RTS line of the serial interface has been used to indicate Busy in addition to
the DTR line. This option allows the RTS line to either be continuously High or
to function as Busy (default).
Robust Xon
This parameter behaves the same as a normal Xon/Xoff protocol, except that
with this parameter enabled, the Xon code will be sent every 5 seconds when the
printer is ready to accept data. OFF is the default.
Config Menu
⇒
Serial I/O
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