Control problem
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DCS can accept one analog signal and output two analog signals at the same time, with these two output signals being exactly opposite to each other!
Of course. A relatively classic control system requires it
No problem; DCS is like a large computer that can handle such logical problems.
Of course, you can. Just think about the principle of step control and you’ll understand.
Step-by-step control isn’t like that, but LZ’s wish can definitely be fulfilled!
Classmate, take a good look – I’m talking about the principle of step-controlled operation. Isn’t it one input and two outputs? And can those two outputs be in the same direction or opposite directions? Wouldn’t that achieve what the original poster intended?
I’m sorry to ask, but in the cases I’ve encountered, split-range control is achieved using two valve positioners connected in series. I was wondering if it’s possible to implement split-range control through a DCS configuration program, so that the two control valves can receive control signals independently?
Yes, in the system I developed, two AO signals are used to control two control valves; the control valves located at the site are quite far apart. In PKS, this can be achieved using the FanOut module; detailed information is available in Control Builder, and standard practices are outlined in the HW training materials.
It’s possible. As long as you understand the principles of DCS control configuration, it can be achieved using the AO output module; alternatively, calculation (logic) modules can also be used to accomplish this function.
Thank you all for your thorough explanations; I understand now, as I learn*......