Epson LQ-1010 User Manual - Page 239
Printing Enabled/Disabled Signals and Control Conditions, on/off control characters, DC1 or DC3.
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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 (Indicator on) on line Low (J1 interface) DC1/DC3 (Data on/off control) DC1/DC3 (no effect) ERROR High on line on line off line High DC1 High Recv'd High DC3 High Recv'd High/Low DC1/DC3 Low (no effect) (no effect) BUSY High/Low High/Low High/Low High ACKNLG Pulsed ea. char. Pulsed ea. char. Pulsed ea. char. Not generated Printing (Disabled/ enabled) Enabled (normal cond.) Enabled Disabled* Disabled *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