Zebra QLn420 User Manual download pdf (Page 20)

Summary of Firmware Release

V68.18.0Z

P1040502-017 03/24/2014

• Avoiding ZPL calibration at startup: The QLn does not automatically perform ZPL

calibration at startup to avoid wasting media. In addition, the SGD command

zpl.label_length can be used to avoid executing the ~JC command for similar reasons

(though ~JC is supported and can be used if desired). This parameter allows the user to

specify the length of the media being used in dot rows, presumably in a startup batch file.

This is the same command used on the QL Plus. The format of the command is as follows

(for a 400 dot row label in this example):

• The zpl.label_length SGD parameter is updated to the length of the media being used if

the ~JC command is executed.

• TCP port: The QLn listens on both ports 6101 (traditional CPCL port) and 9100

(traditional ZPL port), for both the Ethernet and 802.11 interfaces.

ZPL Override Command

A new suite of SGD parameters called device.override has been created. These are permanent

settings which indicate whether or not the specified ZPL commands are ignored. The intent is

to include the device.override commands in a start up file, to take effect on subsequent ZPL

commands sent to the printer via one of the communications interfaces. Only a small subset of

ZPL commands can be overridden, these are listed below. This feature is not supported for

CPCL commands. The following describes the specific SGD commands:

device.command_override.add: looks for a supported override command, and if

supported adds it to the override list. This is a setvar command only.

device.command_override.clear: clears the override list. This is a setvar

command only.

device.command_override.list: returns the list of ZPL commands to override.

This is a getvar command only.

Supported ZPL commands that can be overridden: ^MN and ^MM

Examples

! U1 setvar "zpl.label_length" "400"

! U1 getvar "zpl.label_length"

! U1 setvar "device.command _ override.add" "^MN"

! U1 setvar "device.command _ override.add" "^MM"

! U1 setvar "device.command _ override.clear" ""

! U1 getvar "device.command _ override.list"

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Zebra QLn420 User Manual Page 20