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Figure 7
. Parallel Printer Interface.
4.2 Parallel Printer Interface
The Parallel Printer Interface is compatible with most Centronics compatible printers. The 056-957 contains electronics which
converts data from the Q-300 into parallel information. The electronics are powered from the Q-300. (An older version of this
cable required its own 9 volt battery.)
The Output Format of the Parallel Printer Interface is as follows:
The dosimeter sets up 8 data lines.
If the Busy line is not high, the dosimeter sends a Strobe pulse.
If the Busy line is high, the dosimeter will wait.
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General Printer Configuration (Parallel and Serial)
Each line of print must end with the following two EOL (End of Line) characters:
LF
(Line Feed)
CR
(Carriage Return)
The EOL (End of Line) characters can be:
Both set within the printer configuration.
Both set within the dosimeter configuration.
One setting within the printer configuration and one setting within the dosimeter configuration.
The dosimeter can be programmed to one of the following four settings:
LF/Cr (Line Feed followed by Carriage Return)
Cr/LF (Carriage Return followed by Line Feed)
LF
(Line Feed only)
Cr
(Carriage Return only)
To try a few lines of print, depress RUN/PAUSE twice. If the printer does not work properly, change the
dosimeter setting until it works.
If the system still does not print properly, you may need to change the printer setup. Refer to the printer
manual to aid in the printer configuration. After changing the printer setup, it is usually necessary to reset the
printer as follows:
Turn the printer off for a few seconds and then back on. Most printers only read these switches during
the turn on.
Parallel Printer Configuration
The printer must be Centronics compatible.
The dosimeter baud rate does not matter.
If the printer operates in either the Serial or Parallel mode, be sure that it is set to Parallel.
Serial Printer Configuration
Refer to section 4.3, RS-232 Serial Interface.