Printing Basic Bar Codes

The Bar Code Control Character

Except for a few ASCII control characters supported by bar code mode, all bar code sequences are introduced by the “bar code control character”. The “bar code control character” is the printable ASCII caret character “^” (94 decimal, 5E hex).

Note in particular that the ESC control code (27 decimal, 1B hex) is not used in bar code mode. When the caret character “^” is seen in this chapter, it does not mean ESC and it does not mean “control-_” !

Other Control Characters

BEL is processed and causes the printer to ring the bell. This is supported so that you may annoy the printer operator without exiting bar code mode.

ETX is processed so that ETX/ACK software handshake will work in bar code mode. (As an aside, XON/XOFF software handshake will also work in bar code mode. However, XON/XOFF characters are transmitted only from the printer to the host; XON/XOFF characters should not be sent to the printer.)

FFis supported so that you may easily reach top of form without exiting bar code mode.

LF advances the paper to the next line feed boundary at the currently selected line pitch. If already positioned at a line feed boundary, this will peform a full line feed, if not a partial line feed will be performed to position the paper at the next line. This allows the paper to be positioned properly for text printing after bar code mode is exited.

All other control characters are ignored in bar code mode.

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Printek FormsPro 4000se Series, PrintMaster 850 Series manual Bar Code Control Character, Other Control Characters

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