Lexmark X925 Forms and Bar Code Card Technical Reference Guide - Page 14

PCL 5 emulation: HP, One-dimensional bar codes - firmware

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4 PCL 5 emulation: HP This section discusses the HP commands implemented in the Forms and Bar Code Card. One-dimensional bar codes With Forms and Bar Code Card installed, font selection commands in the incoming PCL 5 data stream are analyzed for typeface characteristic values given in the table "PCL 5 function parameter list" on page 15. If the typeface value is one of those given, then special bar code generation firmware will process the font selection command. Otherwise, PCL 5 emulation proceeds as normal. Defining characteristics The following commands let you further define characteristics of the bar code: Command Esc(s#P Esc(s#H Esc(s#V Esc(s#B Esc(s#S Characteristic Determines the location of human-readable text printed with the bar code. Selects the font used for human-readable text. Selects the bar heights. Selects the bar widths. Selects the space widths. For more information on bar code characteristic parameters and default values, see "PCL 5 function parameter list" on page 15. Command structure considerations These command structure considerations should be followed when implementing bar code applications using the Forms and Bar Code Card: • Always specify the typeface parameter, because it directs processing to the bar code generation firmware. • You must explicitly specify the characteristic values. If no value is specified, then the default value is used. Previously specified non-default values are not retained. PCL 5 emulation: HP 11

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PCL 5 emulation: HP
11
4
PCL 5 emulation: HP
This section discusses the HP commands implemented in the Forms and Bar Code Card.
One-dimensional bar codes
With Forms and Bar Code Card installed, font selection commands in the incoming PCL 5 data
stream are analyzed for typeface characteristic values given in the table “PCL 5 function parameter
list” on page 15. If the typeface value is one of those given, then special bar code generation
firmware will process the font selection command. Otherwise, PCL 5 emulation proceeds as normal.
Defining characteristics
The following commands let you further define characteristics of the bar code:
For more information on bar code characteristic parameters and default values, see “PCL 5 function
parameter list” on page 15.
Command structure considerations
These command structure considerations should be followed when implementing bar code
applications using the Forms and Bar Code Card:
•
Always
specify the typeface parameter, because it directs processing to the bar code
generation firmware.
•
You must explicitly specify the characteristic values. If no value is specified, then the default
value is used. Previously specified non-default values are not retained.
Command
Characteristic
Esc
(s#P
Determines the location of human-readable text printed with the bar
code.
Esc
(s#H
Selects the font used for human-readable text.
Esc
(s#V
Selects the bar heights.
Esc
(s#B
Selects the bar widths.
Esc
(s#S
Selects the space widths.