Yokogawa 414 Batch Controller - Manual (Page 31)

Options 29
A CTS input is provided, and will prevent the instrument from transmitting any
further characters to a printer if the printer buffer is full. The CTS input is usually
connected to the "Data Buffer Full" output from the printer.
If the printer buffer is large enough to handle the messages output from the Batch
Controller, then this input need not be used and can be left unconnected.
Computer
The instrument receives and transmits messages in ASCII, with all command
strings to the instrument terminated by a carriage return while replies from the
instrument are terminated with a carriage return and a line feed.
Xon/Xoff protocol is also supported, and the instrument will automatically
determine if the message sent by the host computer is preceded by an Xoff
character. If it does recognise an Xoff as the first character of a command string,
the instrument will automatically switch to Xoff/Xon protocol, and begin & end all
messages with Xoff and Xon characters respectively. Xoff/Xon protocol is only
available when the RS232 interface is selected.
During Calibration, the instrument can be programmed to operate in a full duplex
or half duplex transmission mode. In full duplex mode, all commands sent to the
instrument will be echoed back to the host computer. In half duplex, the
commands are not echoed.
For more information on the computer interface please consult the manual "The
RS232/422/485 Communications Option for the 400 Series, Version 2".