Printronix P8000 Plus Series Administrator's Manual page 84

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DTR. The printer controls the data flow by sending this hardware signal to the host. If there is enough
room in the printer buffer, the printer will send a high signal; if the buffer is full, the printer will send a
low signal. DTR tells the host if it is safe to send more data. (If the host sends data during an unsafe
condition, data will be lost.)
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 interface are 600,
1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 Baud. The default is 9600 Baud.
NOTE: If you select a baud rate that is greater than 19200, you may also want to increase the Buffer Size
in K parameter 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 1
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 Term 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.
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True (factory default). Continuously asserts the DTR signal.
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On Line and BNF (buffer not full). Asserts the DTR signal when the printer is online and the internal
serial buffer is not full.
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Off Line or BF (buffer full). Asserts the DTR signal when the printer is offline or the internal serial
buffer is full.
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On Line. Asserts the DTR signal when the printer is online.
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False. Never asserts the DTR signal.
Request To Send
This configuration is part of hardware flow control and determines when the Request to Send (RTS)
signal is generated. This signal indicates whether or not the printer is ready to receive data.
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On Line and BNF (factory default). Asserts the RTS signal when the printer is online and the internal
serial buffer is not full.
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Off Line or BF. Asserts the RTS signal when the printer is offline or the internal serial buffer is full.
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On Line. Asserts the RTS signal when the printer is online.
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False. Never asserts the RTS signal.
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True. Continuously asserts the RTS signal.
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