National-instruments PID Control Toolkit 371685C-01 Instrukcja Użytkownika Pobierz pdf (Strona 28)

Chapter 3 Using the PID Control Toolkit

The control loops can be timed in the following ways:

• Software-Timed—In software-timed control loops, the timing is controlled by the

software loop rate. You can implement a software loop with a timer construct, such as a

timer control or asynchronous timer, or a while loop with a delay or sleep operation at

the end.

• Hardware-Timed—In hardware-timed control loops, the timing is controlled by the

DAQ device. The DAQ device is configured with the appropriate sample rate, and the

sample mode is set to hardware-timed.

For more information about DAQ, refer to the NI-DAQmx Help or Traditional NI-DAQ

(Legacy) C Function Reference Help, depending on the DAQ API you are using. Also refer

to the DAQ example programs.

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National-instruments PID Control Toolkit 371685C-01 Instrukcja Użytkownika Strona 28