Specifications

The format for the ^JT instruction is:

^JT#,a,b,c

where

^JT = Head Test Interval

# = The Four-Digit Number Representing the Amount of

Labels to be Printed Between Head Tests

Default value: 0100

Effective for Version 16.4.0

Default value: 0 (Now off)

Acceptable values: 0000-9999

Parameters a,b,c Effective for Version 16.4.0

a = Automatically Select Range of Elements to Test

Y = Yes {I.V.P = Y}

N = No (test range specified by parameters “b” and “c”)

b = First Element to Check when Parameter “a” is “No”

Acceptable values: 0-9999 {I.V.P = 0}

c = Last Element to Check when Parameter “a” is “No”

Acceptable values: 0-9999 {I.V.P = 0}

Effective for Version 16.4.0

The ^JT instruction now supports testing a range of print elements. The

printer automatically selects the test range by tracking which elements

have been used since the previous test.

Also, it is now possible to turn the automatic mode to specify the first

and last elements for the head test. This makes it possible to select any

specific area of the label or the entire print width.

NOTE: If the last element selected is greater than the print width

selected, the test stops at the selected print width.

Whenever the head test instruction is received, a head test is per-

formed on the next label unless the count is set to zero.

ZPL II COMMAND REFERENCE 269