Service manual
General Description
EPL-6600/ActionLaser 1600 Service Manual
1.3.2 Serial Interface
Type: RS-232C/R%122
Transfer system:
Full duplex
Synchronization:
Asynchronous start-stop system
Start-bit:
1 bit
Stop-bit:
1 or
2
bits
Data length:
7 bits or 8 bits
Parity:
Odd, even, or none
Protocol:
X-ON/X-OFF (can be combined with
DTR
control)
DTR
control (can be combined with X-ON/X-OFF)
Transfer speed:
300,600,1200,2400,4800, 9600,19200,
384KI,
or 57600 bps
Error:
Overrun error:
P
recessed as missing data and replaced by “*”
Parity error:
Replaced by “*”
Framing error:
Replaced by “*”
Breaking character: Ignored
Signal description: See Table 1-10.
Table 1-10. Serial Interface Pin Assignments
Pin No.
Signal Name
Vo
Description
1
CHASSIS-GND
-
Connected to the printer chassis. The printer chassis
GND
and the signal
GND
are connected
to
each other.
Serial ASCII data output by the printer. It maintains
“MARK”
2
TXD
~“T
state
(LOW level) between transmitted character codes.
Logic O is at HIGH level (“SPACE”) and logic 1 is at LOW
level (“MARK’).
3
RXD
(RXD+)
IN
Serial ASCII data input to the printer. It maintains “MARK”
state (LOW level) between received character codes.
4 RTS
OUT
Transmission request signal output from the printer. It is
always at HIGH level during power ON.
5
CTS
IN
Always ignored.
Signal input to the printer.
The printer can transmit data through
TXD
while
DSR is at
6
DSR
IN
HIGH level. X-ON/X-OFF, however, can be transmitted
regardless of
DSR
state. It can always be ignored by setting
SelecType
(factory setting).
7
SIGNAL-GND
-
Ground.
8
DCD
IN
Always ignored.
9
(SD+)
OUT
See note 4.
10
(SD-)
OUT
See note 4.
I 1 to 17
NC
No connect.
18
(RD-)
IN
See note 4.
19
NC
No connect.
Signal output by printer. When the
DTR
signals HIGH, the
RXD
signal can be received by the printer. The
SelecType
settings do not specify
DTR
control, the signal level is HIGH
20 DTR
OUT
while the printer power is on. When
SelecType
setting is used
for
DTR
control,
DTR
goes LOW in case of any error
conditions.
The data
(RXD)
from host computer must be stopped within
128 characters after
DTR
goes LOW.
21-25
NC
No connect.
1-16
Rev. A