Bar and line graphs Crimson

I have my crimson program set up to the DSP and to a danfoss vlt drive over RS485. I have a read only integer tag to display the RPM and a read/write integer tag for the drive frequency.

I have set buttons to raise and lower the frequency when pressed and the RPM is increased or decreased on the drive accordantly.

I have set a data log to record the RPM and Frequency on 30 second intervals and these are logged to a CSV file on the CF card.

I wanted to show a live bar or line graph on the GUI to display the changes of the data.

I dragged the line graph from the primitives menu onto the GUI and tried to assign the RPM and Frequency tags onto the graph but a dialogue box says "this expression must be array element"

Is there a way to create the graph from the log files without creating an array as the results are already there and though they could be pulled from there and shown on a graph. Can a graph be made with code? Any advice will be great.

Try the "Trend Viewer" primitive (under System Primitives). It references your log files directly.

You can also use quick plot

For some reason the trend viewer is causing problems with crashing. I have dragged it onto the display and selected the tag for the data i wish to display. But when ever i select to view it the dsp crashes and resets itself

Can you post the cd3 file? Or, better, call Red Lion and send them your code.