Zebra Technologies EPL2 - Manual (Page 110)

UB Command - Reset Label Counter Mode
Description Use this command to clear the UA command
and restore the default setting to allow the
printer to resume printing a batch job if a paper
empty occurs. The page mode (EPL2) printer,
by default, will resume printing if the empty roll
is replaced with new roll (or ribbon) and finish a
batch print job.
Syntax UB
Example: UB ¿
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980352-001 Rev.A