PLC Programming Tutorial for Beginners_ Part 2

▶ Want to learn about industrial automation? Go here: www.realpars.c...
▶ Want to train your team in industrial automation? Go here: www.realpars.c...
==========================
PLC Programming Tutorial for Beginners_ Part-1
• PLC Programming Tutori...
In this lesson we first learn how to assign different addresses to the PLC’s inputs and outputs and then we give each address a representative name using symbol table.
The functions of fillip-flops and timers are quiet basic but in most cases they be very helpful while writing a program. In this lesson we’ll learn how we can use these simple instructions in PLC programming.
When we are PCS7 instead of STEP7 the download icon in OB1 is disabled. After watching this video you’ll learn how you can download your program to the PLC in this situation.
The “stop” switches are normally close. In this lesson you’ll learn how you can turn off all the outputs with pressing a single stop switch!
And at the end you’ll learn how to test your PLC program with PLC simulator and see the signal changes in the online mode!
==========================
To stay up to date with our last videos and more lessons, make sure to subscribe to this KZbin channel:
goo.gl/Y6DRiN
=============================
Like us on Facebook: / therealpars
Follow us on Twitter: / realpars
Follow us on LinkedIn: / realpars
#RealPars #PLCProgramming #SiemensPLC

[@realpars]

Want to learn about industrial automation? Go here: www.realpars.com/individual-pricing Want to train your team in industrial automation? Go here: www.realpars.com/pricing-team

[@sshashlan]

i cant tell you how much i appreciate great content and good teaching keep them coming

[@jollyharami816]

Any good but iam all gues my best don't playing

[@ardentdfender4116]

🤔 This was really awesome from a junior programmer in Automations Controls perspective having watched both videos part 1 & 2. Clearly demonstrated from opening the program, setting the project configuration, clearly showing which exact buttons and tabs etc in configuring the logic controller setup, then clear details how to exactly configure the logic for the system. This should be applauded because many people just say but don’t actually show in details for someone learning and following along and you can be confused as to which button they clicked or drop tab for something. This 2 part video was very well explained and I’ve never even used Siemens Step 7 Software. Well not yet. But this tremendously helps if I did have it in understanding how to setup a project and configure. My 1 only suggestion would be in a future video if possible to use the very same tank, pump system and do a video using Rockwell Studio 5000 with ControlLogic controller in the same detail. As well in same video add a logic version maybe in simple Function Block programing demonstration of same logic for the input/outputs so any newer person learning can clearly see both versions of the logic programing in standard ladder and or including if using Function Blocks.

[@realpars]

Thanks for sharing your thoughts and knowledge with us, Ardent! Regarding your topic request, I have forwarded this to our creator team to add to the list. Thanks a lot!

[@sambromley7394]

I've learned more from KZbin than my $20k trade school. Smh.

[@realpars]

The sad reality. Although we are certainly happy to hear that you are learning so much through our video courses! Keep up the learning curve!

[@myounas1238]

Bro can help me??

[@ronaldoramizo955]

I'm being watching your video it's learn lot on plc

[@kotur10]

Nice video , but ... With this kind STOP button , your reset is active until stop button is not pushed

[@Godsglory777]

This fall (2021) I'm going to school for CNC certification, my first class is industrial robotics and PLC's I wanted to have an idea before I rushed in blind, and these videos are teaching me more than I could have hoped for. Thank you very much.

[@realpars]

That's great to hear, Riley! Best of luck and feel free to leave us any questions you might have.

[@Godsglory777]

@@realpars thank you very much, I might just take you up on that offer.

[@grins047]

Hello RealPars, thank you for doing these introductory videos for PLCs. I really appreciate them.

[@realpars]

+grins047 Thanks for watching!

[@cahyakirana3884]

@@realpars l)l

[@Metallizombie]

I did a similar project for my plc’s I final in school. Our instructor had us se it up for full and half batches as well as mix 1 and mix 2.

[@abhiram721]

animation videos are always helpful and easy to understand....thank you

[@Aswany788]

I think law level switch(L-LEVEL) should be normal close , not as mention to be normal open , then we may need to make some change after.

[@rezaalinejadtory934]

Yes thank you, i was looking for someone mentioning this in the comments

[@daniell1870]

Thank you for this tutorial! Gave me a good start in my Simatic PLC training. I do have one comment to make about it, and maybe you can clarify this for me. The two sensors (H_Level and L_Level), L_Level will always be active when the product is in the tank and approaching H_Level. When the product reaches H_Level, L_Level will still be active. This will make the SR Latch useless and it should instead be a JK flip-flop. Anyways, thank you once again, it does give me a good start on how to use the software and what can be accomplished using it! The animations were very helpful.

[@realpars]

Daniel Lutz Thanks for the input Daniel! When the liquid rises past the level of the "low level" switch, it stops being energized. :)

[@VikashKumar-tk3de]

its very nice video. i do have a query related to network 3. you have used IO.1 high level as a input for valve which will be high or 1 or NC when fluid level is at max and then only output side of valve will be 1 and allow water to discharge at other place. but when fluid level is in the middle level during discharging time then input IO.1 will be low or 0 or NO then output side of the valve will be 0. Then how valve will be remain open to discharge rest fluid?

[@blessedprince883]

I was just introduce to PLC yesterday, and all I can say is that your the best. Please more video on how to use the various tools on processes will be appreciated

[@realpars]

Thanks a million for your kind comment! I will happily pass your feedback and suggestion on to our course developers.

[@mff860]

Thank you RealPars. I think there is a mistake in the last step of the program. The 'stop' button must be modeled as a normally open contact in the program, or if we want to model it as a normally close contact, we should put it in series with the contacts in 'reset' signal path.

[@alekseyalexej9665]

Yes. I noticed this too. An open circuit is required to stop. Accordingly, at the input "R" of the trigger, this signal needs an inversion.

[@МаркЛеонтьев-л4б]

I am also agree with you

[@denys_shvets]

Nice content, thank you so much. Only question is: why in this case NC contact of Stop switch is used(signal is present in reset input of RS flip flop? Looks like in order to make system operate “Stop” button should be pushed all time long. Thank you.

[@anjanakudva476]

The way you say the word “energize” reminds me of Star Trek 😃 Great content!

[@dilpher]

That was awesome. You simplified PLC's for me. Very thourough, step - by - step demonstration. Thank you so much.

[@realpars]

You're very welcome! Great to hear that you fount this video helpful.

[@samanthalopezgarrido5840]

you are the best explaining PLC I ever found! Thank you so much

[@realpars]

Thats great to hear! Thank you, Samantha!

[@ideaCore]

Hello RealPars... You are the master of PLC... I am new and very interested with the system like programming... i like to works with my laptop... Very easy to understand... in hopes you are doing class in Malaysia... Really appreciate it... looking forward for continued relationship...

[@realpars]

+ideaCore Thanks for the input!

[@ericthered9655]

It would be 10 times easier to just write a program in C++.

[@querrythis]

excellent presentation with a simple example to demonstrate the principles. Thanks a lot for sharing your knowledge

[@realpars]

You're very welcome!

[@happysilinda]

It helps a lot especially when your have basic plc training.

[@rickmurphy9613]

Appreciate the explanations you provide, some of us are moving into supporting this equipment from working with other larger gear and no training on even simple programming.

[@realpars]

Thanks for your support, Rick!

[@seankrake4776]

Great tutorial. I know this is a small and relatively basic system, but how much more complex would a typical project be for a control systems engineer? This one had a few processes, and only a handful of I/o devices. I know modular plcs can have significantly more inputs and outputs. I have worked in an engineering environment for nearly a decade, and even in a relatively complex setting, I feel like the programming wouldn’t be difficult, but perhaps tedious.

[@arvinmistry9744]

This is a great tutorial ,if pump 1and 2, are supply by 120v than how we can implement in this projact, Sir thank you

[@uccoskun]

The part 1 and the part 2 are amazing videos. Very easy to understand and follow. I have noticed. The low-level switch is open when there is water, and the high-level switch is closed when there is water. Should not we use the normally closed switch for the low-level switch?

[@realpars]

Hello, Thank you for your question! We see in network 1 both switches are shown logically “open” before any action happens. And in the simulator they are also open which simulates the physical position of the switch “normally open.” But when we close the switch on the simulator the logic of the “L_LeveL” switch turns “green” meaning we made it a logic “1” because we have no water in the tank and we just closed it. As it is stated when the level passed the level of the low level switch we open it in the simulator and it will not be fully “green” as you can see. But it looks “open” because we are just changing the logic. Therefore, with this logic we can’t not make it a normally closed switch unless we change the logic. Hope this clarifies your question. Happy learning!

[@ParadigmShulk]

I was surprised by how well this taught me -E

[@brilianaulia9834]

very easy to understand all video in this channel,Thanks RealPars

[@realpars]

Great to hear that!

[@georgealbo]

Hi sir, Minute 7:31 assume i am discharging and the liquid level between the high level and low level, in this case, the L_Level is on and it will close the valve before the tank is fully discharged, I mean we should put a closed contact for the L_Level so it means that the liquid level is below the L_Level sensor

[@georgealbo]

also i should run the pumps when high level is ---| |------ energized , not working on the low level

[@mahlabeesau8722]

thanks for helping me with plc programing.

[@Venkatesh.Selvaraj]

Please refer our website to know more about the PLC SCADA DCS training programs, www.excelautomationsolutions.com/plc-training-in-chennai/

[@neelendrapandey9902]

Very easy way to understand the basic lvl plc programming. Thnks a lot

[@realpars]

You are very welcome!

[@gregorye6075]

You guys explain better than my tutor in college. Many thanks for such content!!!

[@realpars]

That's a great compliment, Gregory! Thanks a lot!

[@alakenno5497]

Thank you very much for this video. I am an Electrical Engineer, machines and drives.

[@realpars]

Amazing, Ala! Thanks for sharing.

[@jvrbwn6232]

I remember we dont know how to do this kind of mixer. But today, you just have to follow these step.

[@jollyharami816]

Oh my god god miss

[@Shiva68]

This is realy usefull for beginners and the instructor realy super, amazing,thank you very much...

[@realpars]

That's great! Thank you!

[@buudeens]

Low level should be negated contact. Otherwise sensor will give out sigal while liquid is above low level sensor and will be resetting dischage valve flip flop. So if we set LowLVL contact as a NC it will close once level drops below bottom level thus setting on pumps. Of course a relay with NC contact can be used to invert LowLVL signal, but that's aditional cost.

[@babankathare802]

Great video... But i have a small question.. When the liquid reaches to maximum level and high level switch is activated. And mixer and valve are turned on respectively. But when the liquid goes below high level switch the status of high level switch will change and that will affect the entire process... What say?

[@realpars]

The high-level switch, when triggered at high level, starts the agitator and stops the pumps. But unlike the low-level switch, the high-level switch initiates a timer, which, after it times out, opens the bottom valve. The level will go below the high-level switch, but there is no logic that is activated when this happens. When the low-level switch is reached the cycle starts over again

[@guikich]

The FlipFlop is an SR type. Does it give preference to the SET input or RESET input when both are energized? In your example the SET was energized and then you have clicked on RESET. The pumps turned off , so it gave preference to the R input. Does Siemenes have a SR FF with preference to the S input?

[@realpars]

The RS flip flop has the opposite priority of S and R as the SR flip flop.

[@automatikerwunderbar219]

I can't wait for next programming tutorials. You videos, explenations are really good. Thank you for that work!

[@kirpalsingh9724]

Very concise, clear and easy to understand basic programming of PLC. Thankyou very much.

[@realpars]

Kirpal Singh thank you for the kind words :)

[@sammaazani2553]

Best tutorial i ever seen, thanks alot 👍

[@realpars]

Glad you liked it!

[@Index_Nine]

Thanks a lot for the tutorial, I just have two questions: since the stop button is normally closed, doesn't it just reset the flip flops immediately? Also actuating the stop button seems to just discontinue power to the reset part of the flop, please explain how the stop button works. Thank you.

[@realpars]

The stop button is a normally closed pushbutton in the field, so the PLC input is high (or "1") when the button is not pressed. In the video, the stop pushbutton bit had to be set before demonstrating the logic, indicated "not pressed". When the pushbutton is pressed, the contact is broken and the input goes low, or "0". This causes the NC contact to activate the "R" input to each flip-flop, which resets the "Q" output. The "S" input will then need to be reset and then set again to once again set the "Q" output.

[@Index_Nine]

@@realpars thanks a lot, I've been following up with your tutorials please don't stop making them, once again thank you.

[@cadinvent]

Clear and concise.

[@realpars]

Happy learning!

[@tombx5921]

Explanation is clear and easy to understand. Thanks RealPars!

[@realpars]

Glad to hear it!

[@simonrenatus6996]

very nice video and has opened my eyes interms of PLC programming keep us posted with other high level videos for programming.

[@realpars]

Glad you found the video helpful! :)

[@likhoeric9912]

Bro i really appreciate what you doing, God bless

[@realpars]

Thrilled to hear this. Let us know if you have any questions.

[@engcaiobarros]

Your lessons are very appreciated. Thank you so much.

[@realpars]

You're very welcome! Thanks for watching.

[@ismailchirammal7936]

your explanation very easy to teach( crystal clear) thank you sir

[@realpars]

You are most welcome!

[@okolceaser6056]

You're such a good teacher ,I need more illustration on how to link PLC with HMIs thanks

[@realpars]

Glad it was helpful! Thanks for your suggestion.

[@devashishchurendra8427]

Thanks for making this video. It was so helpful to understand the basics

[@realpars]

You are very welcome! Happy to hear that.

[@vuyanijaju9282]

I appreciate this so much. I think I want recommend to my clients to use Siemens computers because of the free training that you give on your machines. How much do your advanced programmes cost

[@realpars]

Hi Vuyani! Great to hear that! You can obtain full access to our complete Course Library (400+ video courses) by subscribing to either our monthly package for $19.99 a month or our yearly package for $119,- ($9.99 per month). You can subscribe through the following link bit.ly/2IpeCp3 Feel free to browse around our Course Library to see which topics we currently cover bit.ly/30AVJaR If you have any other questions or would like any further assistance, feel free to reach back out or email us at [e-mail] Happy learning!

[@azizullah6360]

since output coil is used only one time. so if the all output contacts are connected with the close switch contact, we dont need to connect separate stop contact with each network

[@johngaleleo3273]

Greatly appreciated. Thank you.

[@realpars]

You're very welcome!

[@oyekanmibamidele6196]

Thank God I'm alive for this great teacher

[@realpars]

Thank you!

[@kuahaytiok]

First of all great tutorial content from you guys. I have a question regarding the solution with respect to the usage of the SR latch. We know that SR latch are sequential digital elements which cannot have both it's S & R inputs at logic "1" because that will lead to an undetermined state at the output. Now, what if we hit the "Stop" button at the moment when liquid drops below the "L-Level"? I suppose the SR latch will receive a digital high input both from L-Level sensor and the normally close stop button putting the SR latch into undetermined state? Thank you.

[@realpars]

An SR flip-flop in Siemens S7 is designed to eliminate any undetermined state. This instruction does not behave as an SR latch in electronic circuit design. It is a true flip-flop that takes action on an the leading edge of the S and R inputs. If the S input to the flip-flop is true, the output Q is set true. The output Q stays true, even if the S input goes false, and will remain true until the R, or reset, input is true. If the S input is also true when R is true, the result is that Q will be true. This prevents indeterminate behavior.

[@abdelnacer7721]

one of the best plc videos on youtube !

[@VictorThomas26]

This is lovely, I really gained a lot of knowledge watching this video

[@realpars]

Glad you enjoyed it!

[@brynneraquilena2695]

in your simulation, you turn off "0" the L_LEVEL, if in this program, L_LEVEL is normally open, what happen in the L_LEVEL if it remains "close" or "1"? in actual practice, float level or floatless level switch remain close if the liquid reaches above level of the switch.

[@davidberkouwer]

hi, I agree with you, the low level still remains true the whole time. I suggest to change the normaly opencontact of L_LEVEL in network 3 is changed to Normally closed.

[@sudarshanjogul840]

Thank you sir excellent video. Your explanation is excellent.

[@johnchristianbaguio4793]

Thanks to this video. Now I have the idea of what PLC is😌. I really appreciate this.

[@realpars]

Great to hear that! Thanks for your support.

[@paladin590]

thank you so much, you made the topic looks so simple and easy to understand!

[@realpars]

+AYF Paladin You're very welcome! :)

[@jhonedienbonillaurrutia5629]

it's so insteresting the way that you explained everything thanks i catch it

[@realpars]

You're very welcome! Glad to hear that.

[@thegodfather491]

i appreciate it. This video was so helpful. Thank you!!

[@realpars]

You're so welcome!

[@elmerlacaren2955]

Nice tutorial.. keep making free educational videos

[@realpars]

Thanks for your support, Elmer!

[@veereswararaomaddala3582]

Thank you sir excellent video. Your explanetion is excellent......

[@realpars]

+veereswararao maddala Thanks for the input!

[@josephalexmensah2990]

Your tutorials are very impressive, am grateful to your impartation. Thanks. I am currently operating on 2# electric gas kilns and using plc board in operating to the system, so your program is helpful to me. Keep up with your good job.

[@realpars]

Thanks a lot, Joseph! Great to hear that.

[@jesperlennert920]

PLC seem pretty easy. that you can put a normally closed stop, parallel is confusing when you learned stops should be in series, Electricity wise.

[@andreasbahda2935]

great tutorial. But i have one question. Why the contact of "Stop" use NC? On minute 11:03 , why contact "Stop" not energizing the input reset? Thank you

[@realpars]

Typically, the physical STOP pushbutton is normally closed and energized until it is pressed. This is a fail-safe installation, since breaking the circuit by pushing the button or other electrical event (power loss, wire break, etc.) will also serve to break the circuit and stop the mixer or close the valve. So when the STOP PB is pressed, the NC contact in the R input logic to the SR Flip-Flop becomes true (field input is false) and the flip-flop is reset.

[@akshaykumbhar1464]

Thank you bro , you are a great teacher

[@GobeshonaBD]

Please make a video about PID controller. We want to build a beverage process system. Water and syrup will be mixed with different ratio.

[@realpars]

Hey, thanks for the comment. We have already created 3 videos about PID controller. I will list the links below. What are PID Tuning Parameters?realpars.com/pid-tuning-parameters/ How to Program a Basic PID Loop in ControlLogixrealpars.com/pid-loop/ What is a PID Controller? realpars.com/pid-controller/ Also, if you want to learn more, we have created a full course about configuring and programming a PID controller in TIA Portal. How to Configure a PID Controller in TIA Portal learn.realpars.com/how-to-configure-a-pid-controller-in-tia-portal Feel free to let us know if you have questions while watching the videos. Just put them in the comment section and we'll get back to in less than 24 hours. Happy learning,

[@sneakerhappy35]

good basic tutorial for free. if you go to school for this basic lesson about plc maybe you'll pay 15k to 25k dollars. thank you for this free lesson.

[@realpars]

Glad it was helpful! You're more than welcome.

[@antoniocavalli5474]

You are a true teacher. All very clear and understandable. Thank you

[@Venkatesh.Selvaraj]

Please refer our website to know more about the PLC SCADA DCS training programs, www.excelautomationsolutions.com/plc-training-in-chennai/

[@fatmachinistfataman5360]

is the purchased video include any simulation of PLC for further practice?? I mean what if i want to create some other ladder circuit, i want to know it work or not, do you provide the simulator software??

[@realpars]

+fatmachinist fataman You need to have STEP 7 V5.5 or V13 installed on your computer.

[@b.p.7875]

So is there some kind of primacy in place based on the order of programs? I’m just picturing the valve opening because there’s a time after h_level is energized where the mixer has not yet turned on.

[@realpars]

First, ladder programs, in general., are executed top to bottom, left to right. Since the mixer starts on a high level with no other input conditions in Network 1, the mixer output is set as soon as the high-level switch is energized. On the same program scan, the mixer output Q4.2 is set, thereby preventing the valve from opening in Network 2. Your question raises a very good point. It is always best to use input conditioning to prevent outputs from firing when not wanted, and to avoid the use of rung-position-dependent logic. This is something that comes naturally with practice and experience.

[@richarddemeny611]

Awesome video. Clear explanation

[@realpars]

Glad you found it useful!

[@ayfokirtsega9380]

Your Tutorial is Simple and easily understandable, really !!! thanks so much

[@realpars]

Glad to hear that!

[@marghubhussain2943]

very well explained ...thank you

[@realpars]

You are welcome!

[@h20no63]

Great videos. can you do some examples of add/sub/compare/forcing/modding/or when you need to be offline to change something and when you don't.

[@cogs11]

I wish engineers spoke like this. In my two internships, senior engineers with years of experience never knew how to explain like this. It makes work incredibly frustrating and a waste of time.

[@realpars]

That is an amazing compliment, thanks for sharing that with us!

[@srivatsaa.r.9936]

thanks for yr video on PLC PROGRAMMING FOR BEGINNERS TUTORIAL PART1 AND DEMONSTRATION OF SIMULATION AND TESTING. WELL DONE. S.VATSA

[@realpars]

Thanks for the feedback! :)

[@darrenyoung483]

Will you please make a video with a ultrasonic level meter instead of rotating paddles

[@richardneilson]

Without a short delay to energise the valve output would you not, maybe in the real hardware,get a brief pulse of the valve when the high level sensor is tripped, just as the mixer output locks out the valve SR block? Or would this never happen due to the order of the networks in the program cycle?

[@scottsommer6480]

Because of the order of rungs in this video, the pulsing of the valve when the High Level switch is detected will not happen. However, in the real world, I sometimes use a delay on timer (with a set time of 250 msec or so) to hold off energizing a valve if there is a potential "bit race".

[@alibader04]

This tips is really good . I just have knowledge for how to start plc

[@anjelcosta4839]

Thank you for video. I have one question. When mixer is working for 7 sec his close contact in the Flip Flop (SR M0.1) remain open?. And after 7 sec mixer's conact again became close and valve will open ?

[@realpars]

Correct! While the mixer is running, Q4.2 is on, so the NC contact in the input logic to the M0.1 flip-flop is false. When the mixer times out after 7 seconds, the input of the M0.1 flip-flop goes from false to true, causing the valve to open.

[@khalafabed2427]

Thank you so much It is really very helpful

[@realpars]

You are most welcome!

[@vivinmanikandan1189]

Sir I have some doubts,The low level sensor is to be in NC contact to start the process ,and how could you use the output valve as an input in reset flip-flop sir to shut down the mixer

[@realpars]

What the logic is doing is keeping the mixer from running when the bottom valve is opened. When the high level is reached, the mixer starts for seven seconds (T0 is energized for seven seconds), and when it turns off when the timer expires, the bottom valve can open because the R input will be false.

[@kirankmns2647]

Thank you so much for such an excellent video lecture, My first doubt: is any where memory addresses for timer, sr flip flops were used How MIXER mimics created?

[@jimmyterry2472]

Really Good broth, it's a very good info! We hope you to show us more , from your good info!

[@realpars]

Glad to hear that, Jimmy! Happy learning

[@roadmonitoroz]

I could write the same thing for an arduino or a raspberry pi in python but it was interesting to see how these PLC's are programmed. Of course PLC's have relays built in and are for commercial switching.

[@levi_ackerman111]

Both liquid sensors will be energized at high level .. Right ?

[@mohammadrezagolbaz432]

Very clearly and understood accent Thank you very much

[@realpars]

Great to hear!

[@israelvalerdi3905]

Thanks man do not stop to show us!!!

[@realpars]

You are very welcome! Happy learning!

[@laypyu]

Fantastic explanation. Thank you very much.

[@realpars]

You're very welcome!

[@willytar4411]

One week ago, I bought the WinSP S7V5, do you have some tutorial about this software?

[@realpars]

William Tarazona William, we don't have have video tutorials on this subject unfortunately.

[@jkj1459]

THANK YOU SO MUCH SIR VERY EXCELLENT

[@iraklislas7818]

how can the low level sensor turn off?

[@kaanerdem2822]

when level of the liquid is on high or when valve is ejecting liquid

[@RelativeEarth]

The stop switch (normally closed) How does it not keep the Reset high? Turning off all outputs.

[@jordanblack3447]

Great video, quick question. Technically when the high level switch is immediately activated the mixer is not on. Why wouldnt the logic of the valve open up right when that happens? Or is it going in order of the logic? Thank you.

[@realpars]

The logic is executed one rung at a time, starting at Network 1. When the high-level switch is reached. the mixer logic (on Network 2) energizes the mixer motor which keeps the valve logic (Network 3) from opening the valve until the mixer motor has stopped (after 7 seconds). The inputs are evaluated prior to the evaluation of the Network 1 logic.

[@yeethiolij]

Thank you so much. Can I get the schematic diagram for the electronic part?

[@antoniocavalli5474]

Very good videos. I like them. But i noticed when you energize low level. It cant reset as it will stay energized in this logic as long as there will be liquid in there.

[@versedraina89]

Great work done.Easily understood.Keep it up!

[@Venkatesh.Selvaraj]

Please refer our website to know more about the PLC SCADA DCS training programs, www.excelautomationsolutions.com