Panasonic JB-3300 Technical Manual page 214

Input Signals
a)
b)
Cc)
d)
e)
*EACK
This signal is normally at a high level and goes to a low
level to indicate that the printer has received data and
that it 1s ready to accept more data.
EBUSY
This signal is normally at a low level and goes to a high
level to indicate that the printer cannot receive data.
HIGH in the following cases:
1) During data entry
2) During printing operation
3) In OFF-LINE mode
4) During printer error states
EPE
This signal goes to a high level to indicate that the
printer is at paper end.
The level of the EPE signal is HIGH when the ribbon ends.
*EERROR
This signal is normally at a high level and goes to a low
level to indicate that the printer is in paper end, off-line
and/or error state.
The level of the *EERROR signal is LOW when the ribbon ends.
ESCLT
This signal indicates that the printer is in the selected
state.
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