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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
(Indicator
on)
DC1/DC3
(Data
on/off
control)
BUSY
Printing
(Disabled/
enabled)
SLCT IN ACKNLG
ERROR
On line
Low (J10
interface)
DC1/DC3
(no effect)
High
High/Low Pulsed
Enabled
each
(normal
character
condition)
High
DC1
Recv’d
High High/Low
Pulsed
each
character
Enabled
On line
On line
High
Disabled*
Disabled
DC3
Recv’d
DC1/DC3
(no effect)
High/Low
High
Pulsed
each
character
Not
generated
High
Low
Off line
High/Low
(no effect)
l 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.
8-12 Technical Specifications