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Operator's Guide 61
Protocol
Pressing
YES
prints out the present protocol setting:
•
DTR/X-ON/X-OFF (factory default)
•
DTR
•
X-ON/X-OFF
•
ETX/ACK
Protocol refers to the "handshaking" technique used for serial
communication. For more information concerning hardware and software
handshaking techniques, see Appendix B.
DTR/X-ON/X-OFF. Combines hardware handshaking, using the DTR
signal, with software handshaking, using X-ON/X-OFF.
DTR. Stands for data terminal ready. The printer sets the DTR signal
high when it is ready to receive data from the computer.
DTR is hardware-oriented handshaking initiated by the printer.
X-ON/X-OFF: Stands for Transmission On/Transmission Off. The printer
sends the X-ON status, using device control code 1 (DC1), to the
computer when it is ready to receive data. The X-OFF status, using DC3,
is sent when the printer is busy receiving and processing data. (Also see,
"Robust X-ON" and "X-OFF When Off Line," the next configuration menu
items.)
X-ON/X-OFF is software-oriented handshaking initiated by the printer.
ETX/ACK. Stands for End of Text/Acknowledge. The computer sends
the ETX code to the printer after each line of characters. The computer
waits for the ACK code from the printer before sending the next line of
characters.
ETX/ACK is software-oriented handshaking initiated by the computer.