Xpc target data logging at different rate

My xpc model rund at 100Hz. I want to log several data for a week non stop. However, the data doesn't need to be logged every 0.01s, only every 1s.

How can I log data at a different rate than my simulation steptime? And is it possible to log so many datapoints?

[Gordon Weast]

Jan,

I believe that using the 'Decimation' parameter in a file scope should allow you to save a subset. In your case, set Decimation to 100 to log every 100th time step.

Gordon Weast, xPC Target Development

Answer 1

[Ryan G]

Eventually I would suspect the system will run out of memory for one reason or another. However, you can use a file scope to log the data to a file on the host machine. See xpc data logging on the file exchange.

You can use a rate transition so that the data going to that scope is at 1hz instead of 100hz.

I would make sure as little as possible gets logged in memory since a week is a very long time for a sim in my opinion. Good Luck.

[Jan De Vries]

Thanks, Ryan. Doesn't a rate transition just hold values until next simulation step resulting in the same number of datapoints?

[Ryan G]

It will repeat the values if you set it at a faster rate. If you set it for a slower rate, as you desire here, it will only pass through the value at the 1Hz rate. Go ahead and try it out in Simulink first to verify, but I know it will work as you desire.