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Pin No. Signal name Direction Function
1) DTR/DSR Communication Mode
This signal indicates whether the printer is busy.
SPACE indicates that the printer is ready to receive
data, and MARK indicates that the printer is busy.
The busy condition can be changed by using DIP
SW 1-6 as follows:
Printer status
DIP SW 1-6
OFF ON
1. During the period from when
the power is turned on (includ-
ing resetting using the interface)
to when the printer is ready to
receive data.
BUSY BUSY
2. During the self printing.
BUSY BUSY
3. When the cover is open. — BUSY
4. When the printer stops printing
due to a paper-end.
— BUSY
5. During macro executing standby
status.
— BUSY
6. When an error has occurred.
— BUSY
7. When the receive buffer becomes
-
full.
BUSY BUSY
2) X-On/X-Off Communication Mode
Always space, except during following condi
-
tions:
• Period between reset and communication ena
-
bled
• During self printing
21~24
N/C Not used
25 INIT IN Status of this signal is not checked.
13
25
1
14
D-sub 25 Pin