Table E-2.Printing enabled/disabled signals and control conditions

 

 

 

 

 

 

 

DC1/DC3

 

 

 

 

 

Printing
(Indicatoron)SLCT INERRORBUSYACKNLG
(Data on/off

contr.)

(Disabled/enabled)

 

 

 

 

 

 

 

 

 

 

ON LINE

 

LOW

DC1/DC3

 

HIGH

HIGH/LOW

PULSE EA. CHAR.

ENABLED

 

(Sw. 2-1/interface)

(no effect)

 

(normal cond.)

 

 

 

 

 

 

 

 

ON LINE

 

HIGH

 

DC1 RECV’D

 

HIGH

HIGH/LOW

PULSED EA. CHAR.

ENABLED

ON LINE

 

HIGH

 

DC3 RECV’D

 

HIGH

HIGH/LOW

PULSED EA. CHAR.

*DISABLED

OFF LINE

 

H I G H / L O W

 

D C 1 / D C 3

 

LOW

HIGH

NOT GENERATED

DISABLED

 

 

 

 

(no effect)

(no effect)

 

 

 

 

 

 

 

 

 

 

*Even though printing is disabled, data characters are received and acknowledged, since the printer is looking for another DC1 character, which would allow it to resume printing.