Sampling time must agree

2013 8 2
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更新时间：2022 12 4
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i have an chart which run on event of 1 milli second and i have included the PID library inside sateflow .when ever i click on tune option i get error as sampling time must agree and when i try to run the model i get error asking me to change the sampling time of PID library to -1(inherited ) or constant .

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Guy Rouleau
Guy Rouleau 2013-8-2

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Blocks inside Stateflow Simulink functions must inherit their sample time. This is because there is no way for the engine to know when you will call the function.
If the logic in your Stateflow chart systematically calls the Simulink function at 0.001s, there is no problem setting the sample time of the PID block to -1. Results should be the same as if it had a sample time of 0.001s

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Milan
Milan 2013-8-5
when i change the sampling time to -1 and clicked the option tune in PID controller i am getting error as "input parameter of c2d must be positive scalar***"

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Azzi Abdelmalek
Azzi Abdelmalek 2013-8-2

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Have you changed the sample time or not yet?

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Milan
Milan 2013-8-5
i had changed it to 1 milli second but i was getting error so i changed it to -1 ,the model was running but when i clicked on tune option of PID controller i got an error "input parameter of c2d must be positive scalar "

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Hallo Zusamen,
ich bereite mich vor, gerade bei Matlab-LiveScript zu üben. ich bekomme momentan einen Fehlermeldung "Error using (*) Sampling times must agree" was soll in meinen Matlabscript gändert werden,um diese Simulation durchführen zu können. Vielen Dank

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