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mawright89

Proportional Pressure Regulator Pid Control

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I am planning to use a proportional electro-hydraulic pressure regulator to adjust the pressure within a leak test system to a point set in a DAQFactory based user interface.

The PID loop will control the system but we require the maximum response time to be down to less than a second. The regulator its-self is capable of doing this but will i be able to do this within the software or are the DAQFactory PID contrrollers meant for much larger timescales.

Cheers

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The DAQFactory PID loop is just some math. You can tune it to run as fast as you want, but you are limited to the maximum acquisition speed and control timing of your hardware and the PC. In general, Windows based data acquisition tools can't poll quicker than about 100hz, and that assumes that the communications is instant. You can sometimes tweak it faster than that on multi-processor machines, but you need to know what you are doing (and we can help). But, Windows needs some processor time to update the screen and do all the other stuff it does, and so you can't hog up the processor more than about 100 times a second, and then only if you are quick about it.

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