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/DC3ERRORBUSYACKNLGPrinting

 

(Indicator

 

 

 

(Data

 

 

 

 

 

(Disabled/

 

on)

 

 

 

on/off

 

 

 

 

 

enabled)

 

 

 

 

 

control)

 

 

 

 

 

 

 

on line

 

Low (J1

DC1/DC3

 

HighHigh/LowPulsedEnabled

 

 

 

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

NotDisabled

 

 

(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