Chapter
transmission is held up awaiting an ACK character from the receiving unit. By default, ENQ/ACK is disabled.
XON/XOFF is a protocol where the communication is controlled by the control characters XON (ASCII 17 dec.) and XOFF (ASCII 19 dec.) being transmitted on the same line as the data. XON/XOFF can be enabled/disabled separately for data received from the host by the printer (printer sends XON/XOFF) and for data transmitted to the host from the printer (host sends XON/XOFF).
XOFF is sent from the printer when its receive buffer is filled to 75%, and the transmission from the host is held, waiting for an XON charac- ter. When enough data have been processed so the receive buffer is filled only to 50%, the printer sends an XON character and the host resumes transmitting data. The same principles apply to XON/XOFF sent by the host, even if the percentage figure may differ. By default, XON/XOFF is disabled for data in both directions.
New Line
Selects the character(s) transmitted from the printer to specify the switch- ing to a new line. There are three options:
• | CR/LF | ASCII 13 + 10 dec. (default) |
• | LF | ASCII 10 dec. |
• | CR | ASCII 13 dec. |
Receive Buffer
The receive buffer stores the input data before processing. Default size is 1024 bytes.
Transmit Buffer
The transmit buffer stores the output data to be transmitted before trans- mission. Default size is 1024 bytes.
Intermec EasyCoder PF4i Compact | 51 |
