hello friends, when i done a modelling in simulink error "the "FixedStepDiscrete" solver cannot be used to simulate block diagram,because it contains continuous states" is occuring.... even i tried all the solver types but nothing worked.. help me..

i have tried all the solver and didnt get anything its just giving me the same error without that i cannot run the plc code.please give me a solution .

Thank you

Answer 1

[Fangjun Jiang]

You mean "all the solver" that are available??

Choose "ode45" or "auto". What is the error message if theare are any? It can't be the same as "the FixedStepDiscrete cannot be used".

[Sowmya Bethi]

i have tried the auto its the same dialogue ...but i dnt have the solver ode45 , i have tried all the solvers including auto but its the same error ..!!

[Sowmya Bethi]

i am getting only one error that is the same error which i posted .._!!

[Fangjun Jiang]

Can you show a snapshot of your solver setting page, including the dropdown list of all the available solvers?

Answer 2

[Sowmya Bethi]

[Sowmya Bethi]

[Fangjun Jiang]

On the left of "solver", select "Variable-step" and then try different type of solver.

You may be abel to run simulation but won't be able to generate PLC code. To generate code, the solver type has to be "fixed-step". You need to make your model discrete. Right now, your model has continuous states as the error message says.

[Sowmya Bethi]

so i should change in my model to generate the plc code .

Thank you for the reply so fast ..!!