read the file at a particular rate

Hello

could someone tell me if its possible to read a text previously stored in some file required rate?

(for example if I have 100 entries in my file that I would like to read a value every 5 seconds)

Thanks in advance

First, you must learn to do not use Express VI.  (Look in the finder example for examples on the IO files)

1. you have no good control on the way in which access to the data.

2. you put the annoying dynamic data type that hides that data are and allows you to jump through hoops to get data out of it.

Second, you need a loop.  Right now your code is configured to only run as a single shot.

Here's how you can read one line at a time with a 2 second delay.  (Note that the reading text file has been defined in its right click menu "read lines").

Another alternative (and probably better), would read the entire file at once and then only index the values in the table resulting in a loop with a 2 second delay.

The express VI are some operations that could be easily dealt with native LabVIEW code.  Would like to get rid of these express VI.  The first formula node has some pretty basic with as well.  The largest node formula could also be done with the LabVIEW base operations, but logic programming going on in it is complicated enough that I would probably leave this formula node as it is.

Tags: NI Software

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