3-24
Service Manual
4500–E320/E322
Parallel NPA mode
Parallel NPA mode allows two way communication between the host
computer and the printer.
Perform the following steps to change the Parallel NPA setting:
1. Enter the configuration mode. See
“Configuration mode” on
page 3-14
for more information.
2. Perform a double button press. This moves to the parallel NPA
item on the configuration menu. The parallel NPA (Data) light
comes on solid.
3. The current parallel NPA setting is indicated by the off/on/auto
(Press Button) light.
•
When the light is on solid, all data received by the printer
must be in NPA packets. Any non-packet data is rejected as
bad packets.
•
When the light is off, the printer is not performing any NPA
processing.
•
When the light is blinking, the printer examines incoming
data and decides whether it is receiving NPA packets.
4. Perform a brief button press to select the parallel NPA setting.
5. Perform a long button press. All lights blink once, indicating the
setting is saved.
6. Exit the configuration mode by turning the printer power off.
Off/on/auto Setting
value
❍
The parallel port does not search for NPA data within the
received data.
●
The parallel port requires that data sent to the printer be
in NPA format.
✳
The parallel port searches for optional NPA data within
the received data.
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