Product Information Guide
LQ-570+
Connector pin assignments and a description of their respective
interface signals are shown in the following table.
Input buffer capacity
The printer stores print data. sent from your computer in its input
buffer. Keep DIP switch
1-7
off to select an
8Kbyte
buffer.
Skip-over-perforation.
Turning DIP switch l-8 on when you are using continuous paper
enables the skip-over-perforation function Use this function to leave
a l-inch
(25.4mm)
margin between the last printable line on one
page and the first printable line on the next page. This causes the
printer to skip over the perforation between continuous sheets.
Most application programs take care of the top and bottom margins.
Do not turn on skipover-perforation unless your program does not
provide these margins.
Adjust your top-of-form position with the
MICRO FEED buttons
to get
half of the margin at the bottom of one page and half at the top of the
next page.
Continuous paper page length
When you are printing on continuous paper, DIP switches 2-1 and
2-2 let you select from the four page lengths described in DIP-switch
Table 5.
Tear off
When you turn DIP switch 2-3 on, the tear-off feature is automatic
when using continuous paper. The printer automatically advances
the last printed page to the tear-off position You can then easily tear
off the printed paper.
The printer automatically returns the paper to the loading position
when it receives more print data. You can also return the paper to the
loading position by pressing the
TEAR
OFF
button or the
LOAD/EJECT
button
Use the tear-off feature only with continuous paper loaded with the
push tractor. Do not use the tear-off feature with the pull tractor.
Auto line feed
When auto line feed is on (DIP switch 2-4 on), the printer
accompanies each carriage-return code (CR) received with a linefeed
code (LF).
If your printer is double spacing, turn DIP switch 2-4 off. If each line
overprints the next, turn DIP switch 2-4 on
Interface Specifications
Your printer is equipped with a parallel interface.
Specifications and pin assignments
The built-in parallel interface has the following characteristics:
Datajkrzat:
8bit
parallel
SlphXhdkWl:
STROBl?
pulse
Handshake timing:
BUSY and
m
signal
Signal
led:
TTL compatiile level
GPlnector:
3+1-i
5
7-30360
(Amphenol) connector
or equivalent
Descrltilon
.
Signal
Pin
I
Return
Pin Slgnal Dlrectlon
STROBE
IN
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
ACKNLG
STROBE pulse to read data. Pulse
wrdth
must be more than
0.5
1
;;ctmos%$XXrds
at the receiving
These signals represent
rnformatron
of the 1
si
to 8th bits of parallel data,
respectively. Each signal is at HIGH
level when data
IS
logical 1 and
LOW when it is logical 0.
OUT
About an 11
-mrcrosecond
pulse.
LOW indicates that data has been
received and that the
printer
is
ready to accept more data.
BUSY
OUT
HIGH
sianal
indicates that the
printer
¬
receive data. The
signal goes HIGH in the following
CXSB:
1) During data entry (ea. char. time)
2) During
pnnhng
3)
Durrng
PAUSE
4)
Durina
orinter-error
state
PE
OUT
A HIGH
sranal
indicates that the
printer is
&t
of paper.
SLCT
-
Am
FEED
x-r
OUT
IN
When this signal is LOW, the paper
1s
automatically fed 1 line after
printing. (The signal level can be
fixed
to this by setting DIP switch
2-4 to ON.)
NC
GND
CHASSIS
GND
NC
GND
INIT
-
Not used.
-
-
-
11
Printer’s chassis ground which
IS
-
Twisted-parr
level.
return
signal ground
IN
When this level becomes LOW, the
printer controller is reset to its
power-up state and the print buffer
is cleared. This level is normally
HIGH; its pulse width must be more
than 50 microseconds at the
receiving terminal.
ERROR OUT
GND
NC
-
SLCT
IN
-
This level becomes LOW when the
printer is: 1) in paper out state, 2) in
PAUSE state, 3) in error state
Same as for
Prns
1
Q-30.
-
Not used.
OUT
IN
Pulled up to
5V
through 3.3
Kohm
The DCl/DC3 code is valid only
when
thus
signal is HIGH. This
signal
IS
always LOW.
19
;:
22
23
;z
26
27
10
28
13
-
14
15
16
17
18
1930
31
16
32
-
-
-
33
34
35
36
-
-
Note:
l The column heading “Direction” refers to the direction of signal
flow as viewed from the printer.
.
“Return” denotes the twisted-pair return, to be connected at
signal ground level. For the interface wiring, be sure to use a
twisted-pair cable for each signal and to complete the
connection on the return side.
l All interface conditions are based on TTL level. Both the rise
and fall times of each signal must be less than 0.2 microseconds.
l Data transfer must be carried out by observing the
m
or
BUSY signal, (Data transfer to this printer can be carried out
only after receipt of the ACKNLG signal or when the level of
the BUSY signal is LOW.)
24-Pin Printers
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LQ-570+ - 5