Printing enabledldisabled signals and control conditions
The table below shows the relationship between printing being
enabled or disabled, the on line/off line status, the printer
select signal (SLCT IN), and the receipt of data on/off control
characters, DC1 /DC3.
ON LINE
SLCT IN DCl/DC3 ERROR
BUSY
ACKNLG Printing
(Indicator (Data
(Disabled,
on)
on/off
enabled)
control)
on line
Low
DCl/DC3 High High/Low Pulsed
Enabled
(no effect) ea. char.
(normal
cond.)
on line
on line
off line
High
DC1
** High High/Low Pulsed Enabled
Recv’d
ea. char.
High
DC3
** High
High/Low Pulsed
Disabled*
Recv’d ea. char.
High/Low DCl/DC3 Low High
Not
Disabled
(no effect) (no effect)
generated
* While printing is disabled, data characters are received and
acknowledged so that the printer can look for another DC1
character, which allows it to resume printing.
** Enable only when the SelecType DCl/DC3 setting is On.
Serial interface
The built-in serial interface is an RS-232C asynchronous
interface with the following characteristics:
Data format
Start bit:
Data word length:
Parity bit:
Stop bit:
Baud rate
lbit
8 bit
Odd, even or no parity
1 bit or more
300, 600, 1200, 2400, 4800, 9600, 19200
bits per second.
Technical Specifications 8-13
