Panduit PTR3E - Manual (Page 25)

RIBBON: LED, illuminated when ribbon motion sensor does not
detect any ribbon motion (ribbon out).
ERROR: LED, illuminated when there is a system fault such as
an open print head.
ON LINE: LED, illuminated when printer is ready to receive data.
It is turned on and off by toggling the LINE key.
LINE: Momentary switch. Pressing this key toggles the printer
between the on-line and off-line mode. When the printer
is on-line, it is ready to receive data from the host. This
key acts as a pause during a print job by taking the printer
off-line. It can also be used as a Pause function key to
stop the printer during the printing process.
FEED: Momentary switch. Pressing this key feeds one blank
label through the printer when it is off-line. When the
printer is on-line, another copy of the last label will be
printed.
DSW: DIP switch array to set operational parameters of the
printer.
LCD: 2 Line x 16 Character LCD display. Used for setting
operational parameters of the printer and displaying error
conditions.
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Section 2. Installation