Dascom Tally DP-550, Руководство пользователя

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Appendix B – Using the Serial/USB Interface
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XON/XOFF
Possible Values: Off*, On
This item enables or disables the XON/XOFF (DC1/DC3) character handshaking method used to control data
flow from the host system to the printer. When enabled, an XOFF character will be sent by the printer
whenever the printer’s input buffer is nearly full. An XON character will be sent whenever the printer’s input
buffer becomes nearly empty or if the control panel Setup Mode has been exited.
ETX/ACK
Possible Values: Off*, On
This item enables or disables the ETX/ACK character handshaking method used to control data flow from the
host system to the printer. When enabled, an ACK character will be sent by the printer after an ETX character
has been received and processed out of the input buffer. ETX characters used for handshaking cannot be part of
an escape sequence.
RTS/CTS
Possible Values: Off, On*
This item enables or disables the RTS/CTS hardware handshaking method used to control data flow from the
host system to the printer. When enabled, the printer will activate the RTS signal whenever the printer’s input
buffer becomes nearly empty or when the printer’s control panel Setup Menus are active. The RTS signal will
be deasserted whenever the printer’s input buffer becomes nearly empty or Setup Mode has been exited.
Likewise, the printer will not send data to the host system if the host has asserted the CTS signal.
Note
: This handshaking method may only be used when using the RJ serial connector on the left side of the
printer. These signals are not available on the DB9F connector available on DP-550si models.