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To select a specific printer in multiple printer applications, you must send a specific printer select sequence which consists of the Printer Select Code (factory set is $PRINTER) followed by the desired printer port number. The Printer Select Code and port number are trapped if valid and not passed to the printer.
The printer port number then becomes the printer assignment number for your computer port. All subsequent print jobs sent without a printer select sequence will be sent to this printer port by default. If you desire to send print jobs to the same printer, there is no need to resend the Printer Select Code and the printer port number.
A print job may be sent to a printer port other than the default printer port without changing the default by sending a temporary printer select sequence. The temporary printer select sequence consists of the Printer Select Code followed by capital T and the desired printer port number. The next print job will go the temporary printer port. Subsequent print jobs sent without a Printer Select Code will be sent to the default printer port.
NOTE: If Print Master is reconfigured to add or delete a printer port (i.e., if you change the Port Assignment or Number of Printers), all default printer port assignments for the computer ports are erased and replaced with "0" for contention mode (see Section 6.2.3).
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