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DAQFactory Guru Blog

Posted On: 15-May 08
Edit boxes in HMI software
Using edit boxes on the main pages of your HMI screens is a bad idea. It doesn't matter whether you use DAQFactory or another tool. The problem is feedback.


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Features:

Data logging

After you have created some channels, you will probably want to start by saving your newly acquired data to disk.

Channel persist

If you simply want to save you historical data so you can retrieve it for trending or other calculations with DAQFactory, you can use channel persistence. Channel persistence is a fast binary file that makes accessing historical data transparant to you. You simply tell DAQFactory how many data points you'd like to keep on disk, and the rest is taken care of for you.

Logging sets

If you also, or instead, wish to log your data to regular files or a data base, you can create a logging set. You can create as many logging sets as you need to log different subsets of your data in different formats at different times. You can log to ASCII delimited files or to an ODBC compliant database, or if you prefer total control, you can use low-level file I/O scripting. The ASCII format is universal allowing you to import your data into your favorite analysis software such as Excel. The ODBC format allows you to get your data directly into most all SQL (and non-SQL) databases.

Database querying

There is even support for ODBC querying, so you can easily retreive the data you have logged to your ODBC database, or load other parameters from your corporate databases.