Compaq 5531, 5532, 5525B user manual Baud Rate, Word Length, Stop Bits, Parity, Data Terminal Ready

Chapter 4 HOST INTERFACE

Baud Rate

Sets the baud rate of the serial interface in the printer. Baud rate is the speed at which serial data is transferred between the host computer and the printer. The choices for the RS-232 and RS-422 interfaces are 600, 1200, 2400, 4800, 9600, 19200, and 38400 Baud.

NOTE: If you select a baud rate that is greater than 19200, you may need to use RS-422 to prevent data loss. You also may need to increase the Buffer Size in K parameter from the default (1 Kbyte) to improve performance.

Word Length

Sets the length of the serial data word. The length of the data word can be set to 7 or 8 bits, and must match the corresponding data bits setting in the host computer.

Stop Bits

Sets the number of stop bits in the serial data word. Either one or two stop bits can be selected. The setting must match the corresponding stop bit setting in the host computer.

Parity

Set for odd parity, even parity, mark, sense, or no parity. The setting must match the corresponding parity setting in the host computer.

Data Terminal Ready

This configuration is part of hardware flow control and determines when the Data Terminal Ready (DTR) signal is generated. This signal indicates if the printer is ready to receive data.

•True. Continuously asserts the DTR signal.

•On-Line and BNF (buffer not full). Asserts the DTR signal when the printer is online and the internal serial buffer is not full.

•Off-Line or BF (buffer full). Asserts the DTR signal when the printer is offline or the internal serial buffer is full.

•False. Never asserts the DTR signal.

118