Teledyne 6200A, Manual

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TAI Model 6200A SO
2
Analyzer Operator Manual, 02164, Rev. G
940331 is the default password. The password can be changed to any number from 0 to 999999
by the variable RS232_PASS. To change the password enter the command
V RS232_PASS=xxxxxx
which sets the password to the value xxxxxx.
Protocol of Port communication
The RS-232 interface has two protocols of communication, because if the port is attached to a
computer it needs to have different characteristics than if used interactively. Consequently, there are
two primary styles of operation: terminal mode and computer mode.
When an operator is communicating with the analyzer via a terminal, the analyzer should be placed
into TERMINAL MODE, which echoes keystrokes, allows editing of the command line using the
backspace and escape keys, and allows recall of the previous command. When a host computer or
data logger is connected to the analyzer, it should be placed into COMPUTER MODE, which does
not echo characters received or allow the special editing keys. See Table 6-5 for relevant commands.
Table 6-5: RS-232 Switching From Terminal Mode to Computer Mode
Key Function
Control-T (ASCII 20 decimal) Switch to terminal mode (echo, edit)
Control-C (ASCII 3 decimal) Switch to computer mode (no echo, no edit)
If the command line doesn't seem to respond to keystrokes or commands, one of the first things you
should do is send a Control-T to switch the command line interface into terminal mode. Also, some
communication programs remove CTRL-T and CTRL-C characters from the byte stream, therefore
these characters will not be sent to the analyzer. Check your communications program owners
manual.
Entering Commands in Terminal Mode
In terminal mode, all commands must be terminated by a carriage return; commands are not
processed until a carriage return is entered. While entering a command you may use the following
editing keys:
6-12