User guide

Bar Code Printing on the LA600 MultiPrinter
20.3 Select Bar Code Attributes (DECSBCA)
SC9: Pn4=30
For Code 39 only, the following settings are also supported:
Ps8=0, Pn2=9, Pn4=27
The device defaults to Pn2=10, Pn4=25, Pn6=120.
Ps8=0, Pn2=18, Pn4=54
The device defaults to Pn2=20, Pn4=50, Pn6=120.
20.4 Active Print Position
The active position (AP) is the position where the next data will be printed (if
no control code or escape sequence is sent). After a bar code symbol is printed,
the handling of the AP is different depending on the bar code emulation in
effect.
The LA600 MultiPrinter supports the Line Printer bar code emulation as well
as the DEC PPL2 bar code emulation:
• In Line Printer emulation, the default mode, the AP is the upper right
corner of the bar code. After a bar code is printed, when a single LF is
sent, the next bar code will be printed one line space down, the line space
being defined by the bar code height including the HRC. This technique
prevents consecutive bar codes from overlapping.
• In DEC PPL2 emulation, the AP is the same position as before the bar
code was printed, and line space is defined by the active Set Vertical Pitch
(DECVERP) selection. In this mode, there is a risk of overlapping symbols,
depending on the line spacing and symbol height, if two consecutive bar
code sequences are separated by CR LF only. Instead of using CR LF, use
the following commands to position consecutive bar codes:
Vertical Position Absolute (VPA)
Vertical Position Relative (VPR)
Horizontal Position Absolute (HPA)
Horizontal Position Relative (HPR)
For examples of bar code sequences for these two different emulation modes,
see Section 20.5.
To set the bar code emulation mode, the user accesses the Setup Menu via the
Operator Panel and selects the option ‘‘BARCODE EMULTN’’ under ‘‘Change
Macro and DEC Modes’’.
Bar Code Printing on the LA600 MultiPrinter 20–5