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# DerivitiveOf

When using the DerivitiveOf function on a value that stems from a CAN message coming in less than every cycle, the derivitive is incorrect because the time over which the change occured is not a single cycle time. We have been using a timer to calculate the rate of change. I am not sure if there is a simple solution for this but it would be nice. Perhaps it could use a flag from the CAN frame and calculate the time between them, or something like that.

Customer support service by UserEcho

I think solution for this would be to use a math channel and bring the CAN parameter into that math channel using a single object. Then use a second math channel to do the derivative. This may also work combining both into the same math channel (CAN parameter as object A, then derivative of object A as object B), but i did not test that case.