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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » Data logging frequency

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Author Topic: Data logging frequency
hemohemosg
Member
Posts: 2
Post Data logging frequency
on: July 14, 2017 (GMT)

Torque Pro shows a list of intervals for data logging. Is there a guideline as how many sensors you can practically log per interval. For example, with 1s interval, you can log many sensors but how many? Similarly if I log at 0.1s, what’s the max number of sensors that can be logged reliably.

Is there any concern with data logging overloading ECU?

If I enable data logging and view the realtime charts, does Torque internally “pipe” the data to screen and data logging or query the data independent?

What is the frequency the realtime charts get refreshed/updated?

Capp777
Member
Posts: 2744
Post Re: Data logging frequency
on: July 14, 2017 (GMT)

It seems to me that your pid per second
read speed would be a limiting factor. The
read speed varies greatly for different
protocols.

You will need to balance your setting based
upon your pid read speed and the number of
active displays and logging requests.

hemohemosg
Member
Posts: 2
Post Re: Data logging frequency
on: July 14, 2017 (GMT)

Given the pid per sec varies by the protocol, how many pids forum members here have logged so far?

Recently my car would shudder intermittently while idle. I want to use Torque Pro to log the various sensors to capture the ‘moment’ when the car shudders. What would be the ideal logging interval with enough resolution to capture as many sensors possible? I’d love to hear your experience with data logging, in terms of the max pids and the important pids to capture to troubleshoot any shudder.

Capp777
Member
Posts: 2744
Post Re: Data logging frequency
on: July 15, 2017 (GMT)

My familys Fords use the older PWM
protocol which is limited to about 18-20
pids per second.

If your vehicle uses the newer CAN protocol
yours can be greater than 100 giving you
the ability to log more data at faster rates.

I suggest you identify your sensors of interest
then adjust your sample rate according to
your pid read speed (which is available under
Adapter Status icon information).

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