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Dataproducts Parallel Interface Configuration
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edge of the strobe signal can be configured as leading, middle (default), or
trailing.
Paper Instruction (PI). Carries a DVFU signal from the host with the same
timing and polarity as the data lines.
Ready. Carries a high true signal from the printer when AC power and DC
voltages are present, paper is loaded properly, and the printer is not in a
check condition.
Online. Carries a high true signal from the printer when the Ready Line is true
and the ON LINE key on the control panel has been pressed. When the
printer is in online mode, it may accept data from the host.
Demand/Data Request. Carries a high true signal from the printer when the
printer is ready to accept character data from the host. This signal changes to
false shortly after the leading edge of the data strobe signal.
Cable Verify. Two pins on the interface connector are jumpered together to
allow the user to verify proper installation of the interface connector.
Prime Signal. A high true level from the host to indicate the printer should
perform a reboot.
Test. This signal is connected to +5 volts through a 470 ohm resistor.
Parity Error. Always carries a low false signal from the printer indicating there
is no parity error.
Dataproducts Parallel Interface Configuration
Your printer is configured at the factory to match the interface you specified.
By using the control panel, you can verify and change several interface
parameters in order to meet specific application requirements.
Refer to “Dataproducts Submenu” on page 109 for Dataproducts parameter
descriptions and information on selecting values for the following parameters:
• Data Bit 8 (enable or disable)
• PI Ignored (enable or disable)
• Data Polarity (standard or inverted)
• Data Request Polarity (standard or inverted)
• Strobe Polarity (standard or inverted)
• Buffer Size in K (1-16)
Some application programs require a unique configuration. If the printer is not
working properly in the configuration you have selected, contact an
authorized service representative.