Appendix XON/XOFF When XON/XOFF control is selected, the printer transmits the XON or XOFF signals as follows. The timing of the transmission varies depending on the conditions configured as BUSY. Code The hexadecimal numbers corresponding to the XON/XOFF codes are shown below. • XON code: 11H • XOFF code:
13H 141 Signal Printer status Condition for BUSY Receive buffer full Receive buffer full / Offline 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