So I just happened to fall into the field of automation by chance and your videos have helped me so much when it comes to building my control panels and designing my systems. I've gone from a guy who barely knew what an Ohm was to designing, troubleshooting, building and installing process control panels for all sorts of applications. I don't know where I would be without RealPars. A lot of times I hate going to ask the Engineers in the office what they think as a lot of them just start taking over the processes and avoid trying to teach me what's needed to complete the task. I may not be an engineer by Degree but for the past 5 years I've been able basically teach myself how to act like one. Thanks RP!
Hi Adam, Wow, what an amazing compliment and more so, what an amazing achievement! We are very glad to read this! Keep up the learning curve, and always feel free to reach out if you have any questions along the way. Very impressive!
Hello I'm a electrical engineer working in maritime industry. I find your videos very interesting and easy to understand. Though I'm in to PLC programming but after watching your preseni I have developed great interest in control systems.
The explanations are great, i get simple tuning tips of pid parameters 1. Usually, we use PI controller without D 2. First, disable I and D, give little P parameter, and see the tune result; double P parameter until overshoot and vibration arise. Then change the P parameter to 5o%.
Congrats !! This is the best channel to learn automation and instrumentation. Thumbs up if you want videos about: Pressure regulator valve Back pressure regulator valve
I would like to thank you for this wonderful channel. I have taken a course on measurements and control but through your channel's explanation, I can say that my information is getting better.
Hi Abdo, thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us. Happy learning!
I know im randomly asking but does anyone know of a tool to log back into an Instagram account..? I was dumb lost my password. I love any tricks you can offer me
@Deacon Warren thanks for your reply. I found the site thru google and Im waiting for the hacking stuff now. Looks like it's gonna take a while so I will reply here later with my results.
Sir your videos are amazing and it's helping me in day to day work. I learned many things which I just read in books and here I can find it in practical manner
Hi Vivek, Thanks a lot for sharing your positive feedback with us! We are always happy to hear that. If you have any questions along the way, always feel free to reach out to us! Have you also had a chance to check out our free course on PLC Hardware? bit.ly/2XnnUrF Happy learning!
Totally. I read quite a bit on PID and I was attempting to understand WTF is going on and what I need to set for a water recirculation system. None of the articles I read helped and my boss just makes a comment on what each one means. He simplified it like in this video and it just all of a sudden clicked and I was like "HOW THE HELL DID THIS JUST HAPPEN?" I LOVE RealPars. They are a little dry but for me they explain everything so well for people without major engineering backgrounds.
The best way I heard PID explained was correcting error by looking at accumulated error over the past which would be the I component, the present which would be the P component, and the future by the D component.
Using the first example, sometimes you will hear the temperature sensor referred to as the primary control element and the heater referred to as the final control element.
Thanks for this video Plz plz make a series about how can we programe a PID controller and other calculations that are required to implement a PID controller in a process Please add this series in RealPars course for Beginners to Advance.
You are very welcome! We have already added a course on our library on How to Configure a PID Controller in TIA Portal. You can watch it here: learn.realpars.com/how-to-configure-a-pid-controller-in-tia-portal We are adding a new video to this course each week! Happy learning.
Great as always. your courses are partners to engineers and technologies applications to push all countries toward innovations and more safe conditions within all industrial fields . personally, thanks to your clear explanations i recuperate my old information with trust. thank you and keep help to all engineers and technicians in every facility .
@@realpars telecontrol networks (Radio; GPRS, GPS, multiplexer, etc...) . The advantages of every one of them and what is the best in the harsh environments.
It is explained that there are different effects for each type of PID controller mode in the cruise controller of a car speed? the different effects of these three modes.
Proportional - makes output adjustments proportional to the error between SP and PV (difference between how fast you are going and how fast you want to go). The larger the difference (error), the larger the adjustment. If you are going 30mph and need to go 50mph, you press on the gas harder than if you start at 45mph. Integral - makes output adjustments proportional to how long the PV has spent away from the SP. The integral adjustment adds an adjustment in the same direction (+ or -) to the output as the proportional action. This is analogous to still not being up to speed after accelerating (proportional changes). Derivative acts on the rate of change of the error. If I am accelerating and I start going down a hill and gain speed, derivative tells me to let off the gas to keep from overshooting the setpoint since my speed will accelerate as I go downhill.
"The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is - whichever is greater - it obtains a difference or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missile from a position where it is to a position where it isn't, and arriving at a position that it wasn't, it now is. Consequently, the position where it is is now the position that it wasn't, and if follows that the position that it was is now the position that it isn't. In the event that the position that the position that it is in is not the position that it wasn't, the system has acquired a variation. The variation being the difference between where the missile is and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the missile must also know where it was. The missile guidance computer scenario works as follows: Because a variation has modified some of the information that the missile has obtained, it is not sure just where it is. However, it is sure where it isn't, within reason, and it know where it was. It now subtracts where it should be from where it wasn't, or vice versa. And by differentiating this from the algebraic sum of where it shouldn't be and where it was, it is able to obtain the deviation and its variation, which is called error."
Great video! At about the 6:20 mark, you say that each one of the combos have their own place in the control world. Could you elaborate on this? Do you mean things such as industrial presses, pumps/flow, ect. Which combo should we use for what task?
The use of P, I, and D elements in an industrial control scheme depends upon the application. The PI combination is most widely used for all types of control, since P-only control will always end up with an offset between SP and PV, and Integral is very efficient at eliminating that offset and keeping the PV near the SP. Derivative (D) is useful for processes that do not exhibit a large amount of noise or disturbances A noisy flow signal, for example, is not well-suited for any combination that includes the Derivative term. Therefore, flow loops often are just controlled using PI controllers. Pressure and temperature, depending on the stability of the process measurement, can benefit from PID or PD control. A more detailed presentation of PID control is available on the RealPars.com website in a multi-part video series. Check it out!
The flow meter is most often placed after the final control element. This is true for not only flow control loops, but other types of loops as well (temperature and pressure). Level control sensors are often placed in the tank, which would be upstream of the control valve on the outlet of the tank.
@@realpars yes,....will plz let me know why in flow control loop final control element is on upstream of feedback...I searched through Google but can't get enough explanation
Absoluitely! PLC's are able to be configured to control multiple loops with a single controller. In this video, we keep it simple by introducing you to PID control using a sing;e-;loop controller. For industrial processes, a PLC is widely used because it is able to handle many loops with one controller.
The training courses that you've on your website, are these just the tutorial videos or do you also provide access to some kind of PLC software to train on?
Hey! Thanks for your comment! To answer your question, although it is not required to have access to PLC software to be able to complete our courses. It would, of course, be greatly beneficial if you could practice the material, therefore we provide the option to purchase STEP7 software, either by itself or in a Starter Kit over here bit.ly/2l4YjWD Hopefully, this answers your question sufficiently. If you have any other questions or would like any further assistance, feel free to reach back out or email us at hello@realpars.com We are more than happy to help! Happy learning!
I read in a website that the controlled variable is not changed, but the manipulated is. Since the steering wheel can be moved around, this variable is changing...why is not the steering wheel then called manipulated variable instead? I am confused now..
First, in feedback control loop terminoogy, the most proper term for the steering wheel would have been "manipulated variable". This is the variable that is changed in response to a feedback signal in order to maintain a setpoint. However, the manipulated variable is also often called the "Control Variable". The issue with definitions is due to the use of "control variable" in many other contexts. The definition you gave comes from experimental science, where one variable, the control variable, is held constant while other variables are varied. So the term "control variable" can be a little confusing because of its many contexts.
The flow meter is often placed after the final control element. This is true for not only flow control loops, but other types of loops as well (temperature and pressure). Level control sensors are often placed in the tank, which would be upstream of the control valve on the outlet of the tank. The one case where I definitely would place the flow meter upstream of a control valve is where the discharge of the control valve goes into a process line that quickly ends up at atmospheric pressure. The only consideration is that some flow meters, like orifice plates, need well-developed flow profiles to operate correctly.
Hi Yasmina, Great to hear your motivation! We have a whole course library filled with over 400+ video courses on PLC programming. Our courses are hands-on and specifically designed for beginners to grow into an advanced level on their own pace with our Technical Team ready to assist you with any question you might have during your course. Feel free to browse through our course library realpars.com/ If you have any questions about our courses, feel free to reach back out or email in at hello@realpars.com Happy learning!
Sir can a pid temperature controller be set according to thermocouple type..I had encounterd a past issue like this in which I had to set the type as K but the controller showing J type as default and PT100 as temperature setpoint and the setting was unsuccessful... kindly please clear the doubt
A thermocouple (or an RTD) in a temperature loop can be constructed from different materials. Both a "J" and "K"-type thermocouples work in the same way (generate a varying millivolt signal with temperature), but each needs a different conversion algorithm to convert from a millivolts value to temperature. Therefore, the transmitter or controller input needs to be configured or set to the same type of device (thermocouple or RTD) and same properties (J thermocouple or Pt100 RTD, for examples) as is installed in the process. Pt100 is a setting for an RTD, not a thermocouple, so if you used that setting for your input, your temperature value will not be correct. Moist controllers, transmitters, or specialized T/C or RTD inpout cards allow the type of device to be easily configured in the hardware setup.
We have an advanced course on PID Loops on the Realpars.com website. I agree the there is a tuning episode referred to at 6:40 of this video, but as of today, a RU-vid video on setting tuning parameters has not been released. Stay tuned!
When flowmeter is installted before control valve and used after control valve...pls ans this sir.... if it flow meter is installed before control valve can is it worked at same process....
Yes. The flowmeter can be installed upstream or downstream of the control valve. There may be a preferred location, however, based on the flowmeter type or other considerations. An orifice flow meter needs a very stable flow profile entering the meter, so upstream may be a better choice. A heat exchanger may take a lot of heat out of a process stream, and placing the meter downstream may provide a better environmental condition for measuring flow. A control valve that reduces pressure on a high-pressure stream so that it vaporizes (flashes), would need flow meter to be installed upstream on the liquid side of the valve. So you can see, there are many factors that need to be considered when locating the position of a flow meter in a process line.
thank u sir for replying my message....One more question sir...whenever we installed a control valve and flow meter device..why we are take this device in a loop system.....pls answer this...
And my question was...why the flow meter is installed before the control valve in a loop system..... can we installed flow meter after the control valve in a loop system....
@@dibakarsarkar5530 Yes, please refer to my initial answer to your original question. The flow meter does not care where it is in relationship to the control valve. The only consideration relates to the flow profile -- a flow meter performs better, in most cases, when the incoming flow profile (turbulence, pressure, flow, etc.) is well-developed and steady.
@@dibakarsarkar5530 A control loop is only required when you desire to control the flow by measuring the flow rate and using it to position the control valve to maintain the flow rate at a given setpoint. This close-coupled feedback arrangement allows the system to maintain a steady flow rate.
Hi Nadir, We already have! :) You can register for our free bundle with loads of free video courses via the following link: learn.realpars.com/ Happy learning!
Hoping that our video courses will help clear the confusion :). If there are specific topics/themes that are causing the confusion, please let us know - we would happily provide a new video course on that.
@@realpars Your videos do help. But it does not change the fact that PIDs are confusing. If they were not confusing, there would be no need for you to make several videos that attempt to reduce or eliminate the confusion. 😁
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