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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » Decription Totalizer Calculation

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Author Topic: Decription Totalizer Calculation
fluegelmann
Member
Posts: 18
Post Decription Totalizer Calculation
on: July 1, 2020 (GMT)

Hi.

I wonder if there is any information about how the totalizer function works?

What i found was https://torque-bhp.com/wiki/Equations but it doesn´t explain how to use the tot() function.

My main goal is to get “global variables” that sum up certain values.

/fluegelmann

Capp777
Member
Posts: 2860
Post Re: Decription Totalizer Calculation
on: July 1, 2020 (GMT)

The following is an example second timer…

int(tot(1:lookup(Val{SIM Counter}::0~1=0:2~65535=1)))

Note 1 used for seconds. If the process variable is in minutes
(e.g., ml/min) then 60 would be needed. 3600 for hours
(e.g., MPH); etc.

The tot() function has a catchup feature based upon its
saved (delta) timestamp. It has been suggested that totalizers
should remain active for most accurate results. This can be
accomplished by leaving the dashboard containing totalizer
active, adding to data logging and/or by floating widget.

My timer is a stored value between sessions so note
how I use a SIM Counter which increments when
Torque starts. This causes a zero value to totalize
until the conditional value is achieved, then the timer
resumes totalizing from the saved value by 1. This step
allows the timestamp to become current avoiding the
catchup between sessions.

SIM Counter equation…

Min(Val{SIM Counter}+1:15)

Ian if you are reading this… it would be nice
to add two more parameters to tot() function:

Enable/Disable totalizer.
Initial value.

If a specific initial value could be set when
a reset occurs then count down timers could
be created by totalizing negative values.

MPG?

tot(3600:[0d]*0.62137)/tot(3600:[5e]*0.264172052)

Edited.

fluegelmann
Member
Posts: 18
Post Re: Decription Totalizer Calculation
on: July 6, 2020 (GMT)

Thanks for your explanation.

For me it seems that the totalizer function is only suitable for time based values?

How would you use the function to generate a (second) Odometer that sums up my traveled distance?

What should happen in a function like tot(3600:[PID of the actual distance]) ? Will ist sum up each received value within one hour? Will it stop after one hour?

I´m quite confused.

Capp777
Member
Posts: 2860
Post Re: Decription Totalizer Calculation
on: July 6, 2020 (GMT)

Try totalizing your speed…

tot(3600:[0d]*0.62137)

to yield totalized miles travelled.

I believe [0d] reports in km/h. [5e]
reports in L/h. Note corrections above.
Foggy memory strikes again.

It should totalize your speed into miles.
If your speed was a constant 60 MPH the
totalizer should show exactly 60 miles after an
hour of travel. (Similar to the timer example
given above… a constant value totalized
over time period).

In most cases your “value” for totalizing won’t
be constant. The tot() function looks at the
delta time between readings and adjusts/prorates
its result based upon the base period used every
active cycle.

Clear as mud right?

fluegelmann
Member
Posts: 18
Post Re: Decription Totalizer Calculation
on: July 7, 2020 (GMT)

Thanks again for the explanation.

I will give it a try.

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