SP91 User Manual
reset signal for the printer.
20 DTR
Outpu
t
Same as RTS signal
6 DSR Input
This signal indicates whether the host computer can receive data.
SPACE indicates that the host computer can receive data, and MARK
indicats the host computer can ’ t receive the data.
When DTR/DSR control is selected, the printer transmits data after
confirming this signal （ except when transmitting data by DLE EOT and
GS a ） .
When XON/XOFF control is selected ， the printer does not check
this signal.
XON/XOFF Transmit time
When XON/XOFF be selected ， The printer transmits the following XON or XOFF signal . The difference
of transmit time decided by DIP switch setting.
XON/XOFF Transmit time
Printer status
DIP Switch
ON OFF
XON 传送
1
Turn the power on, the printer enter into online
2
When “ buffer area is full ” of the receive buffer area
be removed
3
When the printer from offline to online
1
Recover from the error by DLE ENQ 1 or DLE ENQ
2 command
Transmit
Transmit
—
—
Transmit
Transmit
Transmit
Transmit
XOFF 传送
4 When receive buffer area becomes full
2 When the printer from online to offline
Transmit
—
Transmit
Transmit
Notes: · XON code is <11>H ， XOFF code is <13>H 。
· In the case of ③ ， When the receive buffer area is full, XON will not transmit.
· In the case of ⑥ ， When the receive buffer area is full, XOFF will not transmit.a
Serial interface socket case
Can use the below signal relational cables.
9
9
9
9 pin
pin
pin
pin serial
serial
serial
serial pin
pin
pin
pin definition
definition
definition
definition 25
25
25
25 pin
pin
pin
pin serial
serial
serial
serial pin
pin
pin
pin definition
definition
definition
definition
9
9
9
9 pin
pin
pin
pin RS-232
RS-232
RS-232
RS-232 serial
serial
serial
serial （ DB9
DB9
DB9
DB9 ） 25
25
25
25 pin
pin
pin
pin RS-232
RS-232
RS-232
RS-232 serial
serial
serial
serial （ DB25
DB25
DB25
DB25 ）
Pin
Pin
Pin
Pin
No.
No.
No.
No.
Simp
Simp
Simp
Simp
lified
lified
lified
lified
Function
Function
Function
Function
Pin
Pin
Pin
Pin
No.
No.
No.
No.
Simp
Simp
Simp
Simp
lified
lified
lified
lified
Function
Function
Function
Function
1 CD Carrier Detect 8 CD Carrier Detect
2 RXD Receive 3 RXD Receive
3 TXD Transmit 2 TXD Transmit
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