CODESYS - the IEC 61131-3 automation software

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PostPosted: Wed May 09, 2018 4:38 pm 
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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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PostPosted: Wed May 09, 2018 11:10 pm 
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Have you enabled dc clock?


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PostPosted: Thu May 10, 2018 8:44 am 
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Josep M. Rams wrote:
Have you enabled dc clock?


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


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PostPosted: Thu May 10, 2018 10:29 am 
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Hi,
do you see this 5s peaks in the cyclic tests of rt_preempt too?

BR
Edwin


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PostPosted: Fri May 11, 2018 10:47 am 
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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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PostPosted: Sat May 12, 2018 10:10 am 
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The cpu works at fixed frequency?

Enviat des del meu Aquaris M5.5 usant Tapatalk


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