This command retrieves a summary of the printer’s printhead
test results. This command mimics the results of the
~HQJT
ZPL
command output.
Getvar
To get the summary of
the printer’s printhead test results:
! U1 getvar "device.printhead.test.summary"
Result
A string in the format of A, B, C, D, E.
A
number Element Failure
B Manual (M) or automatic (A) range
C first test element
D last test element
E failure count
The command will return a
response for all LOS printers. However only printers that support
the head test will display valid values. For all unsupported printers,
C and D above will always be 0.