Engine Start/Stop button logic

Discussion and support for MoTeC Power Distribution Modules

Engine Start/Stop button logic

Postby dzzr on Tue Aug 03, 2021 12:15 am

Hi all,

Does anyone have some tips or example on how to setup the logic for a single engine Start/Stop button on a keypad?

I have the start side of things working perfectly (press and hold button to start). I also have built in checks to the start function like running status using RPM input over CAN.

With the engine running I would like to momentary push the Start/Stop button which will set the ignition coils output to false, until RPM=0 for say 2 seconds, then switch the ignition coils back on automatically ready to start again.

Not sure if I should be using a toggle/set-reset on the ignition coil output or a combination of both with a Engine.Stop function?

Thanks!
dzzr
 
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Re: Engine Start/Stop button logic

Postby SDean on Tue Aug 03, 2021 8:56 am

Hi,

Can you post the current PDM config that you have thanks, this will make it easier for solutions to be offered.

With the coils, I would advise against having them powered if the engine is not running, especially if there is a chance that the ECU could be depowered with the coils still powered.
Stephen Dean
MoTeC Research Centre Melbourne, Australia
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Re: Engine Start/Stop button logic

Postby dzzr on Tue Aug 03, 2021 9:46 am

Hi Stephen,

PDM config attached.

PDM Config.pdm
(113.45 KiB) Downloaded 119 times


Cheers
dzzr
 
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Re: Engine Start/Stop button logic

Postby dzzr on Sun Aug 08, 2021 12:33 am

I haven't tested yet but, could this do the trick? Seems to make sense to me but might be missing something obvious

Image
https://i.imgur.com/HizTWKb.png

Image
https://i.imgur.com/NjTD1qE.png

PDM Config2.pdm
(130 KiB) Downloaded 113 times
dzzr
 
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Re: Engine Start/Stop button logic

Postby dzzr on Mon Nov 22, 2021 10:14 pm

Hey all,

I never got this figured out. My attempt didn't work :(

Anyone got any ideas? :?
dzzr
 
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Re: Engine Start/Stop button logic

Postby adrian on Tue Nov 23, 2021 7:25 am

Give below a try. I changed your Engine Kill Function to pulse on the rising edge of the start button. The pulse is shorter than the delay of Engine Running so that when you are actually starting the engine it doesn't also trigger the stop.

There is an added Engine Kill Pulse function which pulses for 2 seconds when the Engine Kill function becomes true. This function is used in the output.
Attachments
PDM Config3.pdm
(131.99 KiB) Downloaded 55 times
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Re: Engine Start/Stop button logic

Postby dzzr on Tue Nov 30, 2021 9:51 am

Thanks Adrian! It worked perfectly :D :D
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