Printed with the Font Data also bar with PSi sequences, optimizing performance is possible.
The parameter P7 should preferably be set to the value “3” in the barcode sequence on the system side. Then the PSi barcode is printed in “NLQ unidirectional”. This is sufficient for most applications. Tests with readers, however, are recommended.

ESC[;P2;P3;P4;P5;P6;P7_z (Note:_ = Space)

By default, the printer uses the parameter P7 is “1” (= LQ unidirectional). For this, the print head must also be brought into the appropriate position. If the surrounding text in DATA / DRAFT printed in the other print head position, here switchover pauses are inevitable.

Details see Appendix Barcode Quick Reference Manual of the respective printer