Cumulative total from log file

[jwickman]

Hi all,

is there a way to create a maths channel that adds the cumulative total of a channel i.e. fuel used across multiple start / stops of the firmware in a single log.

Cheers John

[MalcolmG]

If you're using i2 Pro, you can take the derivative of the channel, then integrate the derivative except any time that the derivative is negative. Make sure you set the calculation rates to the same frequency and it should give you what you're looking for.

E.g:

accumulator.png (24.68 KiB) Viewed 3368 times

accumulator result.png (17.31 KiB) Viewed 3368 times

[jwickman]

Hi Malcolm,

Unfortunately im not using the Pro version. Im guessing i need the advanced maths functions to be able to do this.