Digital control system

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joebazoka

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Hi. I need Help about digital system implementation. I plain develop a digital controller for a temperature control system. I have some problems with control times. I use sample time of 100us, I read an ADC even 100us. My problem is know when I must applicate the output (input signal procesed with a PID ) to the plant. Regards.
 

Your controller output should be applied to the system every 100us. You could use something like a peridoic timer interrupt with a period of 100us and calculate the controller parameters and apply them to the system in the ISR if the calculation of the parameters take always an equal amount of time.

Regards.
 

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