ฝัง
- เผยแพร่เมื่อ 28 ส.ค. 2019
- After some pre-work in the last videos, let's get our tank system running using a PID controller!
Contents:
- PID Compact
- Cyclic OB with 1ms cycle time
- Block parameterization
- Autoscale
- Block explanation on Inputs/Outputs
- Fitting the block to our tank system example
(- Troubleshooting)
- Testing the PID Compact block
If this video helped you, please consider helping me by joining my "GoFundMe" and donating a small amount to my cause. Link here:
www.gofundme.com/f/let039s-fi... - วิทยาศาสตร์และเทคโนโลยี
You are the best instructor with regards to automation tools. They way you present is just awesome.....
Thank you very much. by end of my headache day, I love to spend one hour on your informative videos releasing all the daily pressure. thank you Hegamurl
Awesome videos fella, I've used a few now and they have been amazingly helpful. As people have said before you teach the subject really well. Thanks.!
Thank you my friend, I've spent almost two days trying to configure the PID control without sucess. Now it's working......
Mate, you're such a good teacher. Thank you for all the uploads!
Sure thing! As long as it's fun creating the videos and helps out, I'll keep them coming. But gotta take a week break, am on a business trip. But I plan continuing after
Thank you Sir, I really like the way you explain and elaborate things in your videos
Great job. I am chasing you in all tutorials
This is great! Thanks so much for continuing with the phenomenal Siemens PLC videos. I have learned so much from you. Keep up the awesome content!
Thanks! I'll continue as much as I can! Also checked your channel, some good stuff on there too!
It is educative and simple to learn . Thanks.
I programed in the past in simatic manager , one line for scale and unscale to read data and control the analog input in fonction of the analog input value.
I used scale bloc to read analog input value and used the output real value to the comparaisons blocs.
I used compares blocs if input are for exmeple >than 50% so i used move fonction to put 10% to the data type in input and i used this input to the unscale bloc to control the the flow of my tank .
At the end i have lot of comparaison bloc , if i have 5% i will open and analogic output to 75% and etc ..., i think the pid bloc work with the same focntion but with others bonus fonctions
I can notice i didn't have tia portal in the past this is why i have to programm like that ^^
One of the best teacher you are Sir
Cheers mate. Your videos are very informative. All the best and keep passing the knowledge.
Siemens made really great product, and you made it more easier to use! I never thought PID can be this easy in Siemens PLC. I guess now my fan operation is really depend on my intermediate relay's life.
Thank you for the incredible explanation !
Thank you awesome break down of how to use a PID
Great explanation about pids. Thank you
Thank you very much! Awesome guides! Why didn`t I find your channel earlier...
Great Job Sir...superb explanation....Hates off to you... Thanks ..
Fantastic video. Congratulations!!.
I wish the best! Keep doing that!
Вы хороший учитель. Спасибо за видео.
That's a very good video!
However one thing I'd change is the cycle time of the OB31.
1ms is really fast, and if you're using a slow PLC or a lot of PIDs the PLC could need more than 1ms to run the OB, which would cause an error.
"Slow stuff" like this tank level and temperature can easily be controlled with a 100ms OB (this was kind of the "standart" with S7-300 and its OB35).
Also if you're not using peripheral access to the In/Outputs there's also nearly no improvement in calling the OB twice as often as your PLC cycle time (e.g. if your average cycle time is 10ms there's almost no point in setting the OB cycle lower then 5ms). (the PLC will only update the values of IW and QW once it starts/finishes the OB1)
The simulation of PID_Compact V2.x with PLCSIM for CPU S7-1200 is not supported. PID_Compact V2.x can only be simulated for CPU S7-1500 with PLCSIM.
Great work! I really enjoy your video's.
You are very welcome! Thanks for watching
Thanks a lot...i lerant so many things from your videos
Thank You very much for Your knowlage!
Wonderful tutorial! I wish I had such a teacher
You are very good teacher sir
It is a great resource.
that was a really nice video.
I had actually done a similar simulation while learning TIA Portal programming, but I always faced the problem of simulating the input (PV).
so I wanna ask, how did you manage to simulate the input to be proportional to the output but does not immediately follow it?
thanks in advance
Thank you for your information
Hello!
Great channel and videos! I have learned so much from you! I have a question: how should I configure cyclic interrupt to have 3 simultaneous Pid Compact? By example 3 tanks with different sensor values and set points?
I tried to include 3 pid compacts in one cyclic interrupt and also 3 cyclic interrupts with one pid compact each with different phase offsets. But didn't work. They all stuck and stopped controlling the outputs.
Thanks in advance!
Köszönjük!
Very helpful. Thank you..
Thanks for the video. How would you configure the runtime wincc
Thanks so much. Finally put my PID test to work after a long (like seriously a loooong time) trying. But i have a question regarding not the PID itself but your test program (OB1). How do you take an integer from the HMI so you can select what option (Auto, Manual, PID, 0 Value) you want to work with? I was trying with the "Set bit in tag" event but all it was doing was taking the integer and using it as a power of 2 (For example, choosing the option with set as an 3, made the tag take a 8 value). Thank you beforehand
Thanks Alot ma for your great lessons..!
das war Klasse danke :)
Great! Thank you so much
Thanks for you Videos and the very good explanations. Do you have Videos about Node-Red on plc and Data-Logging on HMI, i need to log ca. 10 values every second to hmi->USB-Stick. Is there a posibility to use e.g. array and move them to USB-Stick?
Hello, one question. Can the 100% output of the PID be scaled in any other FC block?
Hey, I'm just wondering if you could make source code of the testing environment public. Do you think is it possible? It would help my final a lot.
thank you sir
Kindly share the link of how did you create this program of tank I couldn't find it in your tutorials. Thankyou for your time, your videos are really helpful. Happy New year from Duomo di Milano.
it's the most mystery of his previous video when he was saying that
After a year, did you find it?
Hi
Great video !
I had just one question
Shoud the tme for the cyclic interupt always be set to 1ms?
In some video's from siemens they set 100ms
What is the correct time ?
I m a bit confused as i m a beginner
Thank you very mubh
your videos are god sent vielen danke bro
You are very welcome! Thanks!
Very educational! Thanks! 👌
You are very welcome!
i love u so much, thanx teacher
Very Good Lesson. I have searched between videos for the program logic and Hmi screen for this video to apply it , I couldn't find them. Are they available ? I only could find the analogue input and output scaling but i couldnt find the program logic to operate PID. Thank you in advance.
very good video
thank you very much
Hey thanks for this wonderful tutorial. I’d like to try it out myself but I’m missing out your simulationblocks. Is this something you would like to provide…? 😅 Would be so thankful.
An excellent video! But I`m having some problems for connect the variables with the HMI, specifically with the graph, Please, Could you help me?
hello i have this question let us assume that the pump wich fill the glass had a different behavior during time maybe it related by another store how will the pid treat that
thanks very much
Sir, if I use PER input and output do I have to make a function block for both?
Hi Hegamurl, love your vids! I'm currently doing a school project using an S7-300 controller, do you think you could make a vid explaining how Cont_C is used?
hi, very good videos, now I need to work with PID but I met some problems , PID works just when I press "start" button in comissioning windows, but without this operation it doesn't work.
I like your vid. Thanks
thank you mannnnn
The same thing happened to you, the difference is that I was in the start-up with maximum pressure, I think this is part of the Siemens developers who must improve the software.
Hi I have a question: If I have in my program more then one PID controller, do they have to be in separate cycle interrupts or on the same?
They can be in the same, no problem
Thanks to inspired me............
Hi. It was perfect. I have some problem with tuning. When i start tuning i face with error: the out put value limit are not configured correctly or the actual value does not react correctly. How shoud i put Sampling time
THX
we miss u bro
Vielen Dank erstmal für deine Videos. Ich habe eine Frage. Wie kann ich bei pid Regler eine mindestdrehzahl programmieren? Der Regler startet fährt auf startdrehzahl danach übernimmt der Regler. Vielen Dank.
Hello! How are you changing the "setpoint" of PID from HMI? I don't see a setpoint tag in the "plc tags" that i can associate with HMI to change the value from there. How to do it?
what was the video that shows how you created the code for this simulator. Thanks
TOP
What do you use to simulate the PID. Is it a Lsim function or something you wrote yourself?
I have a question. How to stop and start PID Block with condition? Example: If my temperature goes out of range PID output is deactivated and then restarts again when temperature is in range.
Great,❤️❤️❤️
Herzlich Dank
what if its inputs out of range at that PID block need to start manually from configuration window?
please what is the best way to add 48 pid control loop (temperature control) and make it works in groups (so it will not swicth on all together) and thanks
Hey I am playing around with the pid compact in tia V17 on a S7-1200 PLC.
What I do not understand is that the control output is still quite high ( 67.50) while the PV is already 31.4 celcius and the SP = 30.
Played around with Kp, Ti,Td but the controller output does not return to below 10% if the PV comes close to SP(0.2C).
This someout bugs me maybe you can explain. Thanks
I think you should use ziegler nichols method to get starting parameters. Thank for your great video sir :)
CHR would also work, but yeah... calculating some parameters beforehand is useful! I also made a video on the "autotuning" function of the PID Block
Sounds good...👍 thanks again sir. I'll watch it
What's the method?
hi great teacher i did follow all the configuration but somehow i can not start the pid controller . i can not change to run like you did on the 16:32 minute can you please tell what is the solution
?
The Compact PID controller is in disabled mode - 0, regardless of the settings. Only downgrading the Compact PID from V6.0 to V3.0 in Technology blocks enabled the automatic mode. Is this a bug or a feature? Does somebody know?
Kindly explain how to make io field P, I, D value at HMI
Can you share how you built the display?
How to show PID setting in HMI? Which the tag we can use?
splendid video thank you .........
i tried to find in internet an information about the basic parameters for PID in case of (Pressure , Volume , heating ...) which should be used just as start parameters befor doing pre-tunning resp. fine-tunning . would guide me to some usefull resources especially for first time PID commissioning .???
Thx ®ards
The PID values vary depending on the application, but I advice you to test the values on a simulation model before implementering the control law on a physical system to avoid the potential of damaging components. As far as PID tuning goes, I recommend looking up the "Ziegler Nichols tuning method".
Yep, ZN is a pretty standard method of tuning your system. It is based on some mathmatical formula, which are not to difficult to apply. The strange thing is that they are also based on some "tested constants"... so basically not 100% accurate (which you can never actually get).
In the newest video of this series I show how you can use a "self tuning" method that is integrated in TIA Portal and newer PLC's that I prefer using rather than the manual ZN method
this video would be amazing if we had the previous setup video of all the "already prepared stuff".
If I remember correctly I made a livestream about just that!
Should be this one: th-cam.com/video/Y41Joq-pGBQ/w-d-xo.html
Hello how are you...?? This PID and HMI project can be done on S7 1200 1214 ac/dc/rely..? Greetings from Argentina
@hegamurl
brother can you please help , how can i solve error during pretuning output value limits not configured properly... please help...
Hey Hegamurl, how can I put the input in temperature and get % ?
Hello!!! Could you please explain this to me with a sample?
The difference between setpoint and
process value is greater than 30% of the
difference between process value upper
limit and process value lower limit.
The difference between setpoint and
process value is >50% of the setpoint
Why PID must be in cyclic interrupt? Why it can not be in normal block? Thanks
Hi, could you tell me how to change buttons size, in the curves? thanks
When I'm going to the tuning window, the online status of controller is showing the setpoint value but the input stays to 0. I can't start the PID on this window. Hence I'm changing the input in my simulation, it does not move in the tuning window (it moves fine on the PID ladder block). I did not program any "behaviour model" but it should still moves the input and the output right? I have 0 reaction of the controller...
Edit: can it be due to the ":P" next to my variable name? Because the input is an ID address form a high speed counter
Did you already find the problem? I have the same issue.
I don't remember sorry. It was for my master thesis one year ago
how to used redundant system in plc s7-1200 🙏
i have v16 and a don't know why I cannot open technology objects, each time I try to open add a PID function my appears an error and my program get freeze and close.
Hello Sir, I have two projects at the school where I study, basically upgrading the school's water system. Challenges ... using a pump to pump water into the system but I have a problem with flow and pressure, it is possible to use two PIDs to regulate the speed at the same time that I do not exceed the pressure, the school pipes are no longer new so there is fear of excessive pressure. Second problem I have 10 resistors to heat water for the school gym and I wanted to use PID to individually activate each resistor nowadays the resistors activate all which consumes a lot of energy. Could the Professor help ???
Thank you
Just my thoughts on your topics: How should the flow be regulated? To maintain a specific working pressure? If so, the problem with the protection against overpressure seems to be solved automatically by just setting a safe setpoint for pressure. But be careful with the possibility by overshooting the pressure setpoint from the PID. Therefore some more details about this part of your project would be helpful.
For the heating resistors it should be simple by defining the active number of heating elements at which state of PID-output. So for example your PID-output is 10% -> 1 resistor, 20% -> 2 resistors and so on...some hysteresis might be a good idea, for example: 12% R1 on, 8% R1 off... In this case, you have a cascaded regulation with the PID as a kind of master controller with several 2-point-regulators with hysteresis underneath.
Hope this helps.
@@joerg385 Fantastic .... thank you so much for helping.
Well for the first question the problem is that the intention is that the entire installation maintains a pressure of 4 bar, whether there is 1 tap or 10 open, but we do not want to exceed 6 bar because there is the possibility of damage to the piping. As they are old installations I have to maintain a flow rate because of the boiler where it heats water for the gym, and thus ensure that there will not be a drop in flow or air entering the resistances.
I've been watching and I know that Rockwell has this option of placing two PIDs and using two analog inputs to control an output. But I would like to use Siemens. I already know the programming platform and the equipment that is sold.
For the resistors it seems a good idea I will test with simulator because as there are 10 resistors of 45kw and if it is always on and off it causes power failures. I think it is better to have a 10% rise and fall margin, so as not to create a PWM too fast and not have problems with the energy.
I know it's complicated but we don't always have the best conditions, I'm Portuguese and we have good facilities but they are already old, this year it was 168 years old, but they work, but the person who is looking after the maintenance of everything is already very old then i am from electronics and i really like to program siemens i am trying to find a solution to help.
I have the same problem that u have my output in pid is always 0 why !!!!! What did u do in 5 minute for solve the problem.....'' Sorry for my english ''
what is the link to last video?
i have a problem with the pid block . i have set all the parameters accordingly but my controller is disable - inactive . how to resolve the issue...kindly guide me
Did you already found the problem?
You should mention that its NOT possible to simulate PID with an s7-1200 PLC. Ive been going at it for hours trying to get this to work but finally found out its not possible on the siemens Forums. You would need to use a 1500.
thank you Sir, That's the information I needed
PID_Compact V1.2 is supported by S7-1200 (under Technology blocks Compact PID Version V3.0).
@@petrkamin i was referring to simulation... as in plcSim
Could u do the series about making HMI professional
How can i have your course fro the start?
HI SIR CAN U SPECIFY THE DATATYPES
Can i have the full project please?