Datamax-O'Neil DPL Programmer’s Manual - Manual (Page 88)

Extended System-Level Command Functions
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(PO) Paper Empty – This command sets the length of travel before an out of stock
condition is declared.
(PP) Parallel Direction – This command controls the parallel port communications
settings:
Value Parallel Direction Units / Interpretation
xz
x = Port ID
z = Direction: U (unidirectional – one-way communication); or,
B (bidirectional – IEEE 1284 back-channel operation).
(PS) Present Sensor Equipped – This command allows the printer to sense the
present sensor option. A (or Y) - automatically senses device presence; if
undetected, no error will be generated. E - enables the device, where its presence
must be detected; otherwise, a fault is generated. N or D - disables device detection.
See V for command details.
(pS) Print Speed – See Label Formatting Command Function P for details.
(PT) Tear Position – This command sets the label stopping location at the tear
plate on the printer’s cover.