138
Appendix
6
DSR
Input
This signal indicates whether the host computer can receive data.
SPACE indicates that the host computer can receive data. MARK
indicates that the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data after
confirming this signal (except if transmitted using some ESC/POS
commands).
When XON/XOFF control is selected, the printer does not check this
signal.
Changing DIP switch 2-7 lets this signal be used as a printer reset
signal.
When you use this signal as the printer’s reset signal, the printer is
reset when the signal remains MARK for a pulse width of 1 ms or more.
7
SG
—
Signal ground
20
DTR
Output
1) When DTR/DSR control is selected, this signal indicates whether the
printer is BUSY.
•
SPACE status
Indicates that the printer is ready to receive data.
•
MARK status
Indicates that the printer is BUSY. Set BUSY conditions with DIP switch
2-1.
2) When XON/XOFF control is selected, the signal indicates that the
printer is properly connected and ready to receive data from the host.
The signal is always SPACE, except in the following cases:
•
During the period from when power is turned on to when the
printer is ready to receive data.
•
During the self-test.
25
INT
Input
Changing DIP switch 2-8 enables this signal to be used as a reset signal
for the printer. The printer is reset if the signal remains at SPACE for a
pulse width of 1 ms or more.
Pin no.
Signal name
Signal direction
Function
