Epson TM-T70II Technical Reference Manual page 107

Signal
XON 1) When the printer goes online after turning on the power (or
reset using the interface)
2) When the receive buffer is released from the buffer full state
3) When the printer switches from offline to online
4) When the printer recovers from an error using some ESC/POS
commands
XOFF 5) When the receive buffer becomes full
6) When the printer switches from online to offline
Code
The hexadecimal numbers corresponding to the XON/XOFF codes are shown below.
• XON code: 11H
• XOFF code: 13H
 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.
Printer status
Appendix
Memory switch 1-3
1 (ON) 0 (OFF)
Transmit Transmit
Transmit Transmit
— Transmit
— Transmit
Transmit Transmit
— Transmit
107