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User’s Guide
Transparency Mode H-3
H.2 Transparency Mode
Whenever the printer senses a ^PY command (and the ‘DGCL Recognition’ feature is
enabled), the printer will enter DGCL Transparency mode. In this mode, the printer will
screen incoming data for valid DGCL commands. When a valid DGCL command is
encountered, it will be processed by the Transparency Mode Command Processor (see Table
H-1). All other data will be passed through and processed by the active emulation mode.
Transparency mode processing will continue until the user either initiates a Task with one of
the commands ^E, ^M, ^U or ^V, or exits DGCL mode with a ^PN command. If a Task is
initiated, control is handed over to the Task Mode Command Processor. If a ^PN command is
sensed, control is returned to the active emulation mode. It should be emphasized that the
only DGCL command recognized from the base emulation mode is the DGCL entrance
command ‘^PY’.
Upon entering the DGCL Transparency mode, certain features will he initialized to a default
value while others will be allowed to retain a value obtained from a previous DGCL session.
Likewise when exiting the DGCL Transparency mode and handing control back over to the
active emulation mode, certain features may be initialized to their default value.
The following is a summary of some DGCL Transparency mode features and their values
upon entering and exiting the Transparency mode:
Upon Entering DGCL Feature Value
Data Suppression Disabled
Control Code Suppression Disabled
Double Vertical Dot Density Disabled
Horizontal Repeat Disabled
Unidirectional Print Retains active value
One Dot Barcode Overlap Retains active value
Upon Exiting DGCL Feature Value
Command Character Reverts back to default