Epson TM U200D Technical Reference - Page 152
XON/XOFF Transmit Timing, Data Format When Using RS-485
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NOTES: t Receive buffer full state differs depending on the printer models. Refer to the Specifications of the printers. t The data received is ignored when the space of the receive buffer is 0 byte. XON/XOFF Transmit Timing When XON/XOFF control is selected by the DIP switch, the printer transmits XON/OFF to the host according the table below. NOTE: t For the different models, XON/XOFF transmit timing differs depending on the settings of the off-line conditions by the DIP switches. Refer to the specifications of the printers. XON/XOFF transmit timing Printer status Off-line status DIP SW status ON OFF XON • When the printer goes on line after turning on the transmission power or reset using interface. Transmission TranBsmission • When the receive buffer is released from the buffer full state.t Transmission Transmission • When the printer switches from off line to on line (*1). - Transmission • When the printer recovers from an error through a command. - Transmission XOFF transmission • When the receive buffer becomes full. Transmission Transmission • When the printer switches from on line to off line (*2). Transmission Transmission (*1)XON is not transmitted when the receive buffer is full. (*2) XOFF is not transmitted when the receive buffer is full. NOTE:The XON code is H and the XOFF code is H. Data Format When Using RS-485 Transmission data (8 bits, none parity) START STOP 1 2 3 4 5 6 7 8 RS-485 Communication data format Appendix A-4 Rev. B