what is dt in a transfer block H(s), rate limiter? what factors decide it?

[ivaravi]

this dt is dependant on what? i have a lot of transfer functions H(s), rate limiters,integrators in my vi.all of them are in a while loop.the while loop takes 0.065ms for 1 iteration. so is my dt this? when i used this value i dont get the correct response.please help. explain me how to set this.just dont give me a simple answer that it is sampling frequency dependant.plz.iam attaching my vi.

[Remzi]

Hi,
dt is the time interval which determines the step size of the numerical integration. If you have multiple Tranfer Function VIs (or any VI with dt input) in the same loop, you need to use the same time interval value (dt) for all of them. Please take a look at the attached VI that simulates a closed loop control system. I hope it helps.
Regards,
Remzi A.