Use C125 as Engine Fan controll

[Stian_M]

Hi.
I have a c125 logger that i would like to use as a fan controller.
My setup is Motec C125 with I/O upgrade, Pdm15 and a 8 button keypad. (Engine ecu is still standard.)

I have no comunikation between the engine ecu and the logger because no Can is available.
Than a couple of sensors are connected to An volt inputs and calibrated, like engine temp, oil temp and pressure.

As far as i know it should be possible to send temp signal via can to PDM, but i cant figure out how..
My other option is to use a Aux output to trigger a SW input on the PDM, that i thought should be easier. But still i could not figure out how :-p

Anyone here that could guide me a bit? programming or working on computer is not what i usually do, but hope to make this work before next race.

( have a button on my keypad to start the fan for now, but during a race i have plenty of other things to think about :-p )

Stian_M

[Stephen Dean]

Hi,

Can you post your Dash and PDM configurations?

There is a couple of ways that this can be done, seeing what else is happening in the Dash and PDM helps to point you in the correct direction.

[Stian_M]

Here are the files i guess

[Stephen Dean]

Hi,

I have made some changes to the attached files, with the cooling fans, I have used the hysteresis function to turn fan 1 on when the coolant temp exceeds 82 degrees, and fan 2 at 85 degrees, with both turning off when the coolant drops below 78 degrees. I have also added a low battery voltage cut-off for the fans to protect them from running if the battery voltage drops. These values can be changed to suit.

[Stian_M]

Thank you.
Are the changes made in pdm or c125 file? i get error while opening the pdm file. and the c125 i cant see any changes?
it is a big chance it might be me doing something wrong.

[Stian_M]

sorry now i just noticed the on the c125 file: c125 export via can to pdm.

But still cant open the new pdm file.

[Stephen Dean]

Hi,

I used PDM Manager 1.9.1.0096 to work on the configuration. if you are using an earlier version than this you may not be able to open it.

[Stian_M]

thanks i should have known. i will get the oportunity to test on friday when hopefully the oil system is complete.
But as far as i can see it looks great. had to change the throttle position sent in CAN settings. 'throttle pos' was unassigned it said.
and with these new can settings it looks like i can put my alarm reset button and mode button to the keypad instead of using the dig input buttons?
and maybe remove mye sw input for fuelpump and run it on rpm instead?

[Stephen Dean]

I would recommend using engine speed or the pump request from the ECU to control the pumps, this ensures that the fuel pumps will turn off if the engine is stopped.

[Stian_M]

Looking forward to test it.
Thank you for the Good help.