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

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Appendix
A-4
Rev. B
NOTES:
Receive buffer full state differs depending on the printer models. Refer to the Specifications of the printers.
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:
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
(*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 <11>H and the XOFF code is <13>H.
Data Format When Using RS-485
Transmission data (8 bits, none parity)
RS-485 Communication data format
B
Printer status
Off-line status
DIP SW status
ON
OFF
XON
transmission
• When the printer goes on line after turning on the
power or reset using interface.
Transmission
Transmission
• 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
2
3
4
5
6
7
8
START
STOP