CAN GPS for VSS

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MolsonB
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Joined: Sun Aug 16, 2015 8:47 pm

CAN GPS for VSS

Post by MolsonB »

I'm sending CAN GPS to MS3 1.5.1 beta7, and wondering about the settings on the VSS screen. (Attached screenshot) It took me awhile to figure out ms-1 meant meters per second. lol.

Code: Select all

   gps_speed       = scalar, U16,  500, { bitStringValue( prefSpeedUnits ,  prefSpeedUnits ) }, { msToPrefUnitsScale }, 0.0
   gps_speed_ms_1        = scalar, U16,  500, "ms-1", 0.1, 0.0
The VSS position type, what does that do. Since MS3 is polling the CAN GPS at xxx rate, I don't see how Pulses are relevant. Are they used in the calculation? Only have source code for 1.4, so can't dig into it.

Setting the VSS speed, does that really only effect the fuel economy calculations and odometer ?
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MolsonB
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Re: CAN GPS for VSS

Post by MolsonB »

Bump if anyone knows this screen or code behind it.
jsmcortina
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Re: CAN GPS for VSS

Post by jsmcortina »

VSS can be recorded in your datalogs, used for gear calculation, for traction control, for trans-brake lockout or for torque converter lockup.. However, a GPS is too slow a source for traction use.

Looks like that field is showing ungreyed in error. Ignore it.

James
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MolsonB
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Re: CAN GPS for VSS

Post by MolsonB »

Thanks James, I thought those fields should be grayed out.

I assume the CAN VSS is being used for fuel economy calculations and odometer too?
jsmcortina
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Re: CAN GPS for VSS

Post by jsmcortina »

MolsonB wrote:Thanks James, I thought those fields should be grayed out.

I assume the CAN VSS is being used for fuel economy calculations and odometer too?
The MS3 doesn't perform those calculations, they are configured to occur in TunerStudio.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
MolsonB
Helpful MS/Extra'er
Posts: 76
Joined: Sun Aug 16, 2015 8:47 pm

Re: CAN GPS for VSS

Post by MolsonB »

Ahhh gotcha.
Thanks again James.
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