Appendix
85
XON/XOFF
Whe
n
XON/XOFF co
nt
rol
i
s selec
t
ed,
t
he pr
int
er
t
ra
n
sm
it
s
t
he XON or XOFF s
ign
als as follows.
The
t
ra
n
sm
i
ss
i
o
n
ti
m
ing
of XON/XOFF d
i
ffers, depe
n
d
ing
o
n
t
he se
tting
of DIP sw
it
ch 2-1.
Code
The hexadec
i
mal
nu
mbers correspo
n
d
ing
t
o
t
he XON/XOFF codes are show
n
below.
• XON code: 11H
• XOFF code: 13H
Signal
Printer status
DIP switch 2-1
1 (ON)
0 (OFF)
XON
1) When the printer goes online after turning on the power (or
reset using the interface)
Transmit
Transmit
2) When the receive buffer is released from the buffer full state
Transmit
Transmit
3) When the printer switches from offline to online
—
Transmit
4) When the printer recovers from an error using some ESC/POS
commands
—
Transmit
XOFF
5) When the receive buffer becomes full
Transmit
Transmit
6) When the printer switches from online to offline
—
Transmit
CAUTION
•
When the printer goes from offline to online and the receive buffer is full, XON is not
transmitted.
•
When the printer goes from online to offline and the receive buffer is full, XOFF is not
transmitted.
•
When DIP switch 1-3 is off, XON is not transmitted as long as the printer is offline, even
if a receive buffer full state has been cleared.