Interface Specifications
Printing Enabled/Disabled Signals and Control Conditions
The table below shows the relationship between printing being 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
ACKNLG
Printing
(Indicator
(Data (Disabled/
on)
on/off
enabled)
control)
on line
Low (J1
DC1/DC3
High
High/Low
Pulsed
Enabled
interface)
(no effect)
ea. char.
(normal
cond.)
on line
High
DC1
High
High/Low
Pulsed
Enabled
Recv'd
ea. char.
on line
High
DC3
High
High/Low
Pulsed Disabled*
Recv'd
ea. char.
off line
High/Low
DC1/DC3
Low
High
Not
Disabled
(no effect)
(no effect)
generated
*While printing is disabled, character data is being received and acknowledged so
that the printer can look for another DC1 character, which would allow it to resume
printing.
Technical Specifications
8-11