- 52 -
Pin number Signal name
Direction
Function
7
SG
−
Signal ground
8-19
N.C
−
Not used
20
DTR
OUT
(1) STAR line mode
a) DTR mode
Indicates whether the printer can receive data from the host.
SPACE: The printer can receive data.
MARK: The printer cannot receive data.
b) X-ON/X-OFF mode
Always set to SPACE, except during the following conditions
1. After a reset, until communication is enabled
2. During test printing
(2) ESC/POS mode
a) DTR/DSR mode
Indicates whether the printer can receive data from the host.
SPACE: The printer can receive data.
MARK: The printer cannot receive data.
The conditions that result in a BUSY state change according to the DIP switch
settings.
b) X-ON/X-OFF mode
Always set to SPACE, except during the following conditions
1. After a reset, until communication is enabled
2. During test printing
21-24
N.C
Not used
25
INIT
IN
1) DIPSW3-8 = OFF
Status of this signal is not checked.
2) DIPSW3-8 = ON
Functions as an external reset signal. A space signal with a pulse width of 1 ms
or longer resets the printer.
D-sub 25 pin
13
25
1
14
Printer status
DIP SW 1-6
OFF
ON
1. After power-on reset or interface reset but
before communication is enabled
BUSY
BUSY
2. Test printing
BUSY
BUSY
3. Cover open
–
BUSY
4. Paper feeding through the paper feed switch
–
BUSY
4. Stopped because paper ran out
–
BUSY
5. Waiting for switch input for macro execution
–
BUSY
6. Other error
–
BUSY
7. Receive buffer full
BUSY
BUSY