CODESYS Forge - CODESYS Forge / Talk / Runtime 🇬🇧: Ethercat Lxm32m movevelocity speed control overshoot every 5 seconds

Ethercat Lxm32m movevelocity speed control overshoot every 5 seconds

Forum: Runtime 🇬🇧

Created: 2018-05-09

Updated: 2023-08-17

mATTO - 2018-05-09

Hello, I have RPI-1 B @ 1000 MHz frequency

Linux raspberrypi 4.4.9-rt17+ #2 PREEMPT RT Thu May 12 00:18:09 CEST 2016 armv6l GNU/Linux

CODESYS Control for Raspberry PI 3.5.12.10

when the axis is running in continous_motion with mc_movevelocity, speed overshoot occurs every 5 seconds, I cannot find the cause, seeking it sinve 3 days

thank you in advance for your help

BR Ozcan

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josepmariarams - 2018-05-09

Have you enabled dc clock?

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mATTO - 2018-05-10

Josep M. Rams hat geschrieben:
Have you enabled dc clock?

Of course Josep dc clock is enabled, if not the communication will be problematic

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eschwellinger - 2018-05-10

Hi,
do you see this 5s peaks in the cyclic tests of rt_preempt too?

BR
Edwin

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mATTO - 2018-05-11

it's very interesting, when rt-tests is running it never occurs but when the test is finished, speed overshoot starts again

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josepmariarams - 2018-05-12

The cpu works at fixed frequency?

Enviat des del meu Aquaris M5.5 usant Tapatalk

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