C-Link Protocol Commands
Instrument Identification Number
B-2
Model 42
i
Low Source Instruction Manual
Thermo Electron Corporation
•
describes and gives examples of the
I/O commands.
•
describes and gives examples
of the record layouts.
Instrument
Identification Number
Each command sent to the analyzer must begin with the American Standard
Code for Information Interchange (ASCII) symbol or byte value equivalent
of the instrument's identification number plus 128. For example, if the
instrument ID is set to 25, then each command must begin with the ACSII
character code 153 decimal. The analyzer ignores any command that does
not begin with its instrument identification number. If the instrument ID is
set to 0, then this byte is not required. For more information on changing
Instrument ID, see Chapter 3, “Operation”.
Commands
The analyzer must be in the remote mode in order to change instrument
parameters via remote. However, the command “set mode remote” can be
sent to the analyzer to put it in the remote mode. Report commands
(commands that don’t begin with “set”) can be issued either in the remote or
local mode. For information on changing modes, see Chapter 3,
“Operation.”
The commands can be sent in either uppercase or lowercase characters. Each
command must begin with the proper instrument identification number
(ASCII) character. The command in the example below begins with the
ASCII character code 170 decimal, which directs the command to the
Model 42
i
Low Source, and is terminated by a carriage return “CR” (ASCII
character code 13 decimal).
If an incorrect command is sent, a “bad command” message will be received.
The example below sends the incorrect command “set unit ppm” instead of
the correct command “
set gas unit ppm
.”
Send:
set unit ppm
Receive:
set unit ppm bad cmd
The “save” and “set save params” commands stores parameters in FLASH. It
is important that each time instrument parameters are changed, that this
command be sent. If changes are not saved, they will be lost in the event of a
power failure.
<ASCII 170>
T
I
M
E
<CR>
Summary of Contents for 42i
Page 4: ...WEEE Compliance WEEE Compliance Thermo Electron Corporation ...
Page 14: ...Tables xiv Model 42i Low Source Instruction Manual Thermo Electron Corporation ...
Page 28: ...Installation Startup 2 6 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...
Page 128: ...Operation Password 3 100 Model 42i Low Source Instruction Manual Thermo Electron Corporation ...
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