Black Box PI750A, Руководство пользователя

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CHAPTER 8: Troubleshooting
The problem with this configuration is that the word-
processing software uses the 8th bit for special characters such
as accents and line-drawing characters. Also, AutoCAD requires
8-bit characters when it sends plot bitmaps to the printer. The
original configuration that set the serial ports on the PC and
the Multiport Spooler VIII to 7 bits and even parity must be
changed.
Solution 1: Configure your PC’s serial port (with MODE COM1:9600,N,8,1)
and the corresponding Multiport Spooler VIII port (with
MPSCONF) to 8 bits and no parity. This will allow the word
processor to print the accents and other special characters. The
plotter, which is permanently set to 7 bits and even parity, will
still work as usual. Use the UCTP or a command entered at the
DOS prompt to redirect your PC’s output to the printer instead
of the plotter. Any time you go back to AutoCAD and plot, the
plotter driver will reconfigure your PC’s serial port to 7 bits and
even parity. When the plotting is done, you must again use the
DOS MODE command to configure your PC’s serial port for 8
bits and no parity, as just described.
Cause 2: An additional problem arises when you want to use the
AutoCAD “output to printer” option. (Note that since
AutoCAD normally prints on LPT1, you must use the DOS
MODE command to redirect LPT1 to COM1 [or whatever PC
serial port you are using].) Suppose you have been plotting
from within AutoCAD when you decide you want to use the
printer instead. Because the AutoCAD plotter driver has set
your PC’s serial output port to 7 bits and even parity, you
cannot simply use a UCTP control command to redirect the
output of the Multiport Spooler VIII to the printer. This PC
serial port setting (7 bits and even parity) might alter any
commands or data you send from your PC to the MPS-VIII.