Engine speed fault

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Re: Engine speed fault

Postby David Ferguson on Wed Oct 09, 2024 5:25 am

Those input captures show the signal should be falling edge. It looks like you could use a hysteresis of 2V at 1000 RPM, and probably 7V at 6000 RPM and above.

Thank you for posting those.
David Ferguson
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Re: Engine speed fault

Postby Juan on Wed Oct 09, 2024 8:24 am

David Ferguson wrote:It looks like you could use a hysteresis of 2V at 1000 RPM, and probably 7V at 6000 RPM and above.

I will try this setting.

What about debounce?
I have not seen hysteries or threshold noise.
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Re: Engine speed fault

Postby David Ferguson on Wed Oct 09, 2024 8:46 am

The signal looks pretty clean, for a 60 tooth trigger wheel, I might start with debounce values of (80@0rpm, 60@1000rpm, 15@6000 rpm, 10@10000). Then I adjust as recommended in the help for Engine Speed Pin Debounce.
David Ferguson
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Re: Engine speed fault

Postby Juan on Thu Oct 10, 2024 1:39 am

David Ferguson wrote:The signal looks pretty clean, for a 60 tooth trigger wheel, I might start with debounce values of (80@0rpm, 60@1000rpm, 15@6000 rpm, 10@10000). Then I adjust as recommended in the help for Engine Speed Pin Debounce.


Thank you David
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