Methods for Writing Data to a Card

Is one method of writing data to a card better than the other?

An advantage of the CardOut() instruction is that it is very simple to add to your program.

In many applications, however, the TableFile() instruction with option 64 has advantages over the CardOut() instruction. These advantages include:

• Allowing multiple small files to be written from the same data table so that storage for a single table can exceed 2 GB. The TableFile() instruction controls the size of its output files through the NumRecs, TimeIntoInterval, and Interval parameters.
• Faster compile times when small file sizes are specified.
• Easy retrieval of closed files via File Control File Control is a feature of LoggerNet, PC400 and RTDAQ datalogger support software. It provides a view of the datalogger file system and a menu of file management commands. utility, FTP File Transfer Protocol. A TCP/IP application protocol., or email.
• Closed files are safe files. Anytime a file is open for writing, it can become corrupted if a power loss occurs or if the writing is interrupted for any reason. TableFile() Option 64 will close files at the programmed time or record interval. Once those files are closed, they are safe from this type of corruption.

To learn more about the TableFile() Option 64, consider the following resources:

• Technical paper: A Better Way to Write High-Frequency Data to 16 GB and Smaller CF Cards.
• Blog article: How to Store Datalogger Data to a Memory Card.