Epson FX-286e, FX-86e BUSY, ERROR, ACKNLG, On-Line, DC1/DC3, SLCT IN, Printing, on), contr.), (Indicator, (Data on/off, (Disabled/enabled), signals and control conditions

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

On-Line			DC1/DC3						Printing
		SLCT IN			ERROR	BUSY		ACKNLG
(Indicator	on)		(Data on/off	contr.)					(Disabled/enabled)
ON-LINE		LOW	DC1/DC3		HIGH	HIGH/LOW			ENABLED
		(interface)	(no effect)				PULSED EA. CHAR.		(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		HIGH/LOW	DC1 /DC3		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.