Figure 3-4. LJfg
3.4 - LJlogger
LJlogger sends and receives data in command/response mode by making 2 DLL calls to “AISample” and 1 DLL call to
“AOUpdate”. It is capable of saving data to disk (2 Hz max) and performing various actions on trigger events.
Figure 3-5. LJlogger
The main window for LJlogger is shown in Figure 3-5. The white colored items and the “SDX” buttons are controls to be
edited/selected by the user. The grey colored items are indicators which display various information about the LabJack. Clicking
the button labeled “Save Panel Settings” will save the current values of the controls as the default values.
If SDX is activated for a given analog input, the corresponding SDX DLL will be used to determine the scaled data. Users can
make their own SDX DLLs (see the source code for more information), to provide more complex scaling or scaling that depends
on other analog inputs.
Clicking the “Configure” button shown in Figure 3-5 brings up the window shown in Figure 3-6:
Working Directory: This is the directory where data and configuration files will be written.
Data File Name: Determines the name of the data file to which data will be written. New data is appended to the end of this
file.
Data File Write Interval: Determines the interval at which a new row of data will be written to the data file. Minimum of 0.5
seconds.
HTML Write Interval: Determines the interval at which the HTML file is rewritten.
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