Printronix L5035 user manual Serial Parameters RS-232 And RS-422 Host Protocol, Xon/Xoff

Serial Parameters (RS-232 And RS-422)

Host Protocol

The Host Protocol parameter allows you to select the software flow control protocol used for communications between the printer and the host computer. You can also turn off software flow control.

Values: None, XON/XOFF, ETX/ACK, ACK/NAK, ENQ/ACK, SERIES 1, 1 CH, or SERIES 1, 2 CH.

This parameter must be set to match your host computer.

The actions for each of the seven possible parameter values are as follows:

None (default)

When you select None, the software flow control between the printer and the host is disabled.

XON/XOFF

When you select the XON/XOFF protocol, the printer does the following:

•When not ready to receive data (i.e., offline or full data buffer), the printer sends ASCII code DC3 (Device Code 3, hex 13, XOFF) to the host.

•When ready to receive data (i.e., online and empty data buffer), the printer sends ASCII code DC1 (Device Code 1, hex 11, XON) to the host.

NOTE: XON means “transmit on;” XOFF means “transmit off.”

ETX/ACK

The ETX/ACK protocol enables the flow of communication to the printer by sending a block of data, and ending the block with an End of Text (ETX) signal. When the printer receives the ETX signal, it acknowledges the signal, thereby indicating it has received the entire block of data.

89