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B–8
Host I/O Interfaces
RS–232 Serial Interface Signals
The RS–232 serial interface signals are defined below.
Receive Data (RxD) – Serial data stream to the printer.
Transmit Data (TxD) – Serial data stream from the printer for transmitting status
and control information to the host. Subject to protocol selection.
Request To Send (RTS) – Control signal from the printer. Subject to
configuration.
Clear To Send (CTS) – Status signal to the printer indicating the host is ready to
receive data/status signals from the printer. When CTS is enabled, DSR and CTS
must both be asserted for the printer to transmit flow control characters to the
host.
Data Set Ready (DSR) – Status signal to the printer indicating the host is in a
ready condition. DSR is ignored unless CTS or CD are enabled.
Carrier Detect (CD) – Status signal to the printer. The ON condition is required
for the printer to receive data. Available as a configuration setup option.
When
CD is enabled, the host must assert both DSR and CD for the printer to accept
data.
Data Terminal Ready (DTR) – Control signal from the host to the printer. When
enabled, the host will activate the data channel. Subject to configuration.
RS–232 Serial Interface Configuration
The printer is configured for the RS–232 serial interface via the “Host Interface”
menu as described in Chapter 3, “Configuring the Printer”. The following interface
configuration parameters may be modified to meet specific application
requirements:
Host Protocol XON/XOFF
Baud Rate 9600
Data Word Length 8 Data Bits
Stop Bits 1 Bits
Parity None
Data Term Ready True
RTS Function Online and BNF
Buffer Size In K 64
Poll Character 0
Poll Response 0 MS