Latest threads in ⧑ Industrial Control Groupshow only best voted threads
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Co-located control
What is co-located control? Where can find details? Thanx/NSP
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16 years ago
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Completion of Controller Synhesis
Electrical Driven Overhaed Crane Control PD2(PDI)Z1Z2 PD2 = feedforward PID = feedback Z1 = process disturance Z2 = controller output or equivalent disturbance Page 1 = diagrams and mathematical...
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16 years ago
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Help: Position Feedback with Mitsubishi Servos
Position Feedback with Mitsubishi Servos Does anybody have experience with Mitsubishi servos and time to answer a question? Most parameters, except target positions, are set by GX-Configurator QP. All...
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16 years ago
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PWM Control DC Motors
This approach nearly always uses an H- bridge to drive the motor and needs a special reverse switch to reverse it. (see pic) how do PWM servos work through zero degrees and into reverse? I thought it...
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16 years ago
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Coil activation current for 30 HP contactor
Hello, I am working with some Cerus CRC-40 amp reversing motor contactors, and I am trying to determine what the coil draws when pulled in. I have searched the data sheet a couple of times and I can't...
3
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16 years ago
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PD2 Feedforward Control for Process Transfer Function with Damping = 0
To whom who is interested: Page 1: Process transfer function with 'damping ~ 0' Page 2: PD(PID) control, PID not active Page 3: Math Model WORKS!
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16 years ago
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Envelope Optimization and Control Using Fuzzy Logic
by Fred Thomasson The basic building tool for envelope optimization is the fuzzy logic Envelope Controller (EC) function block. Such EC blocks are often chained (or sequenced) one after the other....
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16 years ago
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Counter/Timer boards
Hi, is there somebody who has got experience with the following counter/ timer boards: -NI PCI 6602 -Sensoray Model 626 I will use one of these boards for an application and I'm not yet sure which of...
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16 years ago
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PD3(PID)Z Math Control Modelling
Discussed so far has been Math Model PD3(PI) control. E.g. a known 3rd order process transfer function could be controlled best using PD3 feedforward when the set point has been moved by steps....
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16 years ago
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Fractor
I accidently stumbled onto the Fractor page on Wikipedia. have never heard of these components, but the description seems curious. Looks remarkably similar to a snubber, except of course they are not...
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16 years ago
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Question about PI control integration time
Hello, I am working on a PI controller for a pump system, and I am trying to figure out how to relate the gain and integration time to the physical system. The system set point is 60 psi. If the...
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16 years ago
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abt control nets
hello everyone im the new member of this group..hope every one will help each other n me... n can i know the detail note on controlnet and devicenet communications in plcs?
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16 years ago
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EZ Automation touchscreen update speed vs AB
We have just finished a large project using an EZ automation touchscreen and we found that the update speed of the screens was very poor, in the neighborhood of 8 seconds on a switch to a new screen....
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16 years ago
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I need help whith control pid
Hello: I am something desperate because I need help to control a plant with a PID. The idea is that it can find the values of Kp, Ki and Kd, of the controller, since I have one but I do not have these...
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16 years ago
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Recomendations for a modbus library
I have just been presented with a little job. I need to make a converter between modbus protocol and a proprietry one. They are thinking of using the xnut [1] unit. I would have to write the code to...
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16 years ago
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