Epson LQ-510 User Manual page 222

Interface Specifications
Printing Enabled/Disabled Signals and Control Conditions
The table below shows
enabled or disabled, the on line/off line status, and the receipt of the
data on/off control characters, DC1 or DC3.
ON LINE SLCT IN DC1/DC3 ERROR BUSY
(Indicator
on)
on line Low (J1
interface) (no effect)
High
on line
High
on line
off line High/Low DC1/DC3 Low
(no effect) (no effect)
* While printing is disabled, character data is being received and
acknowledged
character, which would allow it to resume printing.
Technical Specifications
8-12
the
relationship between printing being
(Data
on/off
control)
DC1/DC3 High
DC1
Recv'd
DC3
Recv'd
so that
the printer can look for another DC1
High/Low Pulsed
High/Low Pulsed
High
High/Low Pulsed
High
High
ACKNLG Printing
(Disabled/
enabled)
Enabled
(normal
ea. char.
cond.)
Enabled
ea. char.
Disabled*
ea. char.
Disabled
Not
generated