Maximum step size warning in Simulink

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Nuno
Nuno 2011-3-14
Hi... What is this error?
"Warning: Using a default value of 2 for maximum step size. The simulation step size will be equal to or less than this value. You can disable this diagnostic by setting 'Automatic solver parameter selection' diagnostic to 'none' in the Diagnostics page of the configuration parameters dialog "

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回答（4 个）

Kaustubha Govind
Kaustubha Govind 2011-3-14
This is a warning, not an error. The Simulink Engine is warning you that you have not selected a "Max step size" in the Solver pane of the Configuration Parameters Window, and so it is choosing a value of 2. Typically, you shouldn't have to worry about this, unless you really want to the solver to take a step size greater than 2.
Nuno
Nuno 2011-3-14
But when i change to 2, appear the next error: "Warning: Using a default value of 0.0008 for maximum step size. The simulation step size will be equal to or less than this value. You can disable this diagnostic by setting 'Automatic solver parameter selection' diagnostic to 'none' in the Diagnostics page of the configuration parameters dialog ".
Always appear the error, and don´t appear the results...
  1 个评论
Kaustubha Govind
Kaustubha Govind 2011-3-15
What solver are you using? Also, if it is discrete, what is the smallest sample-time in your model?

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Indira
Indira 2011-3-15
What kind of simulation you are doing?
samin
samin 2011-7-23
i have this probelm too,i check lots of examples in simulinik but all the time i have this warning and cant use 'simulink plc coder' for subsystems ,because i have to solve all the warning and errors

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