3-40 Printer Operation
EN
Pacing (Handshaking)
Pacing (or “handshaking”) is a type of communication between the
printer and the computer. This is an important setting in the printer
because it allows the printer to tell the computer when to send
information. If the printer is unable to receive information, for
example, when the print buffer is full or when the printer is out of
paper, a signal is sent to the computer to stop sending information.
When the printer is able to resume receiving information, it sends
another signal to the computer to send more data.
Pacing is set through the control panel’s I/O Menu. Two types of
handshaking are supported by the printer:
●
Select DTR/DSR through the I/O Menu’s PACING item if the
computer requires hardware flow control (most personal
computers do). Through the I/O Menu’s DTR POLARITY item, the
DTR polarity can be set to High or Low. The default is DTR
POLARITY=HI.
●
Select XON/XOFF through the I/O Menu’s PACING item if the
computer requires software flow control (for example, if you are
using a UNIX workstation). Note that status readback messages
are not paced when XON/XOFF is selected. Through the I/O
Menu’s ROBUST XON item, Robust Xon can be set to ON (the
default) or OFF. Note that the ROBUST XON item only appears under
the I/O Menu if XON/XOFF is selected.
