This command retrieves a summary of the printer’s printhead test results. This command mimics the results of the
ZPL command output.


To get the summary of the printer’s printhead test results:
! U1 getvar "device.printhead.test.summary"
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.