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 (J10

DC1/DC3

High

High/Low

Pulsed

Enabled

 

interface)

(no effect)

 

 

each

(normal

 

 

 

 

 

character

condition)

 

 

 

 

 

 

 

On line

High

DC1

High

High/Low

Pulsed

Enabled

 

 

Recv’d

 

 

each

 

 

 

 

 

 

character

 

 

 

 

 

 

 

 

On line

High

DC3

High

High/Low

Pulsed

Disabled*

 

 

Recv’d

 

 

each

 

 

 

 

 

 

character

 

 

 

 

 

 

 

 

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.

8-12 Technical Specifications