Siemens S7-1200 to Arduino Modbus TCP/IP Communications Part 3.

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Welcome to a Siemens S7-1200 to Arduino Modbus TCP/IP Communications Tutorial Part 3.
In this video we have introduced an Arduino into the mix, which communicates with the Siemens S7-1200 PLC and Factory I/O using the Modbus TCP/IP Protocol.
This Siemens S7-1200 Modbus TCP/IP Video is 1 of 3 Modbus videos where we deal with the Arduino; programming it to function as a Modbus Server. The Arduino reads a potentiometers’ rotational position via an analogue input then stores that value in an input register.
In the following videos, the Siemens S7-1200 PLC, being on the same local area network is able to read the value stored in the Arduino Input register and use it as a setpoint to control the Water Level in the Tank.
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Please note at 1 minute 8 seconds into the video (1.08) it says Part 5 on the top right hand side of the screen. This is an error on my part as it should actually say Part 3. Sorry for any confusion Hope you enjoy the video .
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As a prelude to this video you may want to watch the previous two videos on Water Tank Level Control as they will definitely help you understand what we are trying to achieve. The Links are below:
Siemens S7-1200 Water Tank Level Control Part 1.
• Siemens S7-1200 Water ...
Siemens S7-1200 Water Tank Level Control Part 2.
• Siemens S7-1200 Water ...
To view the next video in the series, Siemens S7-1200 Modbus TCP/IP Communications with Arduino Part 3. select the link:
• Siemens S7-1200 to Ard...
A free 30 day Licence of Factory I/O
If you would like to get a free 30 day licence of Factory I/O or even purchase a copy, you can use the link below. I will earn a small commission for this, however, it helps me produce videos like this one to help you program PLCs now and in the future and it shouldn't make a difference to the price you pay.
Many thanks.
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Details about my patreon account will be added here shortly.
The Siemens S7-1200 System Manual
V4.4 11/2019, A5E02486680-AN

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Опубликовано:

20 фев 2021

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Комментарии : 59

@betasub 3 года назад

Hi! Today, I've done a prototype to measure high currents (80kA) through a shunt and an external ADC, then the Arduino send that to a PLC 1200. Thanks to your (great) tutorial, I've done that in few hours. Thank you very much!

@MarioCrispino 3 года назад

Great stuff Tristan. Sounds very technical.

@wafatikhurrosyad7089 2 года назад

Thanks for the tutorial, im using ESP32 instead of arduino with ethernet shield. Thank you so much

@MarioCrispino 2 года назад

You are welcome! Very glad you like the tutorial.

@Time4yes 2 года назад

How did you go about it? Is it wifi connection?

@MarekLS60 Год назад

Great tutorial

@MarioCrispino Год назад

Glad you like it Merek

@qzorn4440 2 года назад

do have one on esp32 serial2 modbus rtu rs485 19200n1 master read input-registers 30001 30002 from slave-1 digital panel-meter-modbus then display the values serial monitor? great modbus video, thank you 🙂

@arefrrafiee7546 8 месяцев назад

Thanks for this great tutorial. Are you sure about the the terminology you explained in the beginning of the video? I think Modbus server and Modbus Master are almost the same thing. It is correct for Modbus client and Modbus slave. But you mentioned something different. Could you check that please?

@MarioCrispino 8 месяцев назад

Think I may have used server for slave which makes sense to me. It was a long time ago though so not completely sure. I may have mentioned client for Master which again makes sense to me. Hope that helps

@mohamedaminesadki5542 3 года назад

Hello sir, first i would like to thank you for all your videos. If you don't mind i have a question for you: actually i'm working on a project where i need to use Tia Portal as an HMI (with an S7-1200 which is already done and works for me), but the problem is i that can't connect my PLC directly to my system, so i have to use an Arduino between the PLC and my system. For that, is there a way to make the connection you already made between Aduino and PLC but these time conversly? what i mean is i need to send data from PLC (specifically my HMI) to my Arduino. And thank you again for your time.

@MarioCrispino 3 года назад

I believe this is possible Sadki, it's a matter of changing the roles. What was the slave now becomes the master and vice versa. I think the information is in the PLC manual and the Arduino notes I show in the video. I haven't done it yet but I'm confident it is possible. God luck.

@rolandoespino6148 9 месяцев назад

Have you ever used the library Settimino to make a conection Arduino - PLC? Great tutorial btw

@MarioCrispino 9 месяцев назад

Don't think I've ever used that library. Glad you enjoyed the tutorial

@aakashmalhi2114 2 года назад

would be really helpful if you would give us the link for the libraries you downloaded in Arduino IDE

@aakashmalhi2114 2 года назад

github.com/andresarmento/modbus-arduino you can find it in the above link. Thank you

@MarioCrispino 2 года назад

Glad you found the link. I think I showed the link in this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IZjzgbkkImU.html

@moka6682 3 года назад

Hi, at home my code is working but when I do a ping test, I don't have any signal you have any idea?

@MarioCrispino 3 года назад

If the program is working and everything communicating then the ping should work. I had this problem and found that my hub was not suitable and my Arduino could not communicate with my PLC and PC. Once I replaced it everything was fine. Hope that helps.

@markbartolome6727 2 года назад

Hello sir, can you please help me on how to communicate the laptop and arduino using modbus protocol.

@MarioCrispino 2 года назад

Yes this is definitely possible but I don't have the time to go through it. I'm sure there are a few videos on RU-vid about this that explain it well.

@louisvanmeensel6512 5 месяцев назад

I always get a following fault message: Arduino\libraries\Modbus\src/Modbus.h:10:10: fatal error: vector: No such file or directory #include I tried to implement the vector libary in the arduino IDE, but this doesn't seem to work. Are there any solutions for this?

@marklee1209 2 года назад

I’m hoping this works over WiFi connection between S7 and Arduino? I have an Arduino Braccio shield on top of a Uno WiFi R2, adding the Ethernet shield causes the Braccio (robot arm) to fail.

@MarioCrispino 2 года назад

I've not used the Braccio but it looks good.

@marklee1209 2 года назад

@@MarioCrispino well, I’ve tried tonight following your tutorial… and it doesn’t seem to be connecting. The S7 looks like it’s waiting for the Server (Arduino) to connect. I’m guessing there maybe some Arduino code changes required to use WiFi rather than Ethernet. Arduino is new to me so I need to sit and understand more. I think tomorrow I’ll connect the Ethernet shield and disconnect the Braccio and see if it can connect over Ethernet, I’ll know them if it’s Arduino or S7 issue.

@marklee1209 2 года назад

Ok, good news. The Arduino with the ETH shield works. I know my Siemens config is correct. Now, I need to amend the Arduino code to work via WiFi. 🤔

@MarioCrispino 2 года назад

Sounds like you are getting there. Great stuff!

@dewargoosen8951 Год назад

@@marklee1209 Have you found anything working over WiFi? I tried the Eth method and is working fine, but want to go over WiFi.

@dj1encore 2 года назад

I have tried to port this code to the rp2040. The rp2040 uses ‘C’ code and I needed to modify the headers. Unfortunately I was not able to adapt the code. I wonder if anyone else has tried to port the Modbus tcp code to stm32 or rp2040 (I feel I’ve that they are both arm cortex M0).

@MarioCrispino 2 года назад

Interesting David. Could I ask why you are trying that? Good idea though.

@MarioCrispino 2 года назад

Are you trying it step by step as a RP would scan a different way to a PLC? I'm sure it can be done but might be quite involved.

@dj1encore 2 года назад

@@MarioCrispino I started to implement the libraries step by step. In android the compiler errors were hard to follow so I moved to VS code which is supported by the Raspberry PI organization. This is where I found the compiler error that “Class” is not recognized and guessed that the pi pico did not support it. I am trying again step by step. My starting point is tcp functional code. Thank you for the excellent video and help.

@dj1encore 2 года назад

I now have it working with the RP2040, the RP2040 has a different pin out, I also had to delete the default Ethernet libraries and install the wiznet library. The libraries work really well and are very easy to implement. The next step is to port then to freeRTOS.

@MarioCrispino 2 года назад

Well done David, I think you should make a video about it and place it on RU-vid.

@anishassen1768 2 года назад

hello please can you help me about communication between esp 32 arduino and interface HMI

@MarioCrispino 2 года назад

Unfortunately I can't really comment on anything I haven't done in the videos

@thuanhuynhthanh9680 Год назад

can you show me how to code when i have two more potentiometer, please help me

@MarioCrispino Год назад

Unfortunately I don't have time to even get my own work done at the moment. Good luck, if you understand the basics about using one pot then it shouldn't be too much of a leap for more of them.

@user-vz1jo9rf8c 2 месяца назад

What type of ethernet switch did you use?

@MarioCrispino 2 месяца назад

I just used and old router

@kamugishajoseph6467 Год назад

thanks sir for the nice video. how do i configure my Arduino as master in tia potal? thanks

@kamugishajoseph6467 Год назад

can i configure it the same way for plc

@MarioCrispino Год назад

I've not done this yet but it shouldn't be too difficult to switch them around depending on what you are trying to achieve.

@Time4yes 2 года назад

Sir, can I connect arduino shield straight to my laptop,So that it acts as the real plc? I don't have enough money to buy s7-1200.

@MarioCrispino 2 года назад

The shield needs a network connection to a hub/router and it needs to be mounted on the Arduino. Then the laptop needs to be connected to the hub/router too.

@Time4yes 2 года назад

@@MarioCrispino thanks, since I have a router that means I can be able to do this project, right? The network should be Ethernet connection in this case.

@MarioCrispino 2 года назад

What will you do for the PLC? SIM?

@Time4yes 2 года назад

@@MarioCrispino yes.

@DeKempster Год назад

Wait whut, slave = server and master = client. Who thought that was a good naming scheme.

@MarioCrispino Год назад

I agree.

@jackkrawatt3908 3 года назад

hi, very good guide, but i havent now a s71200 to test, can i try the guide with my tiaportal 15.1 with plc sim? or i try many tolls for modbus but dont work ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7EHTXIpfSks.html can you give me a help to verify your arduino software ty in advance!

@MarioCrispino 3 года назад

I haven'y tried it with PLC Sim, would be good to find out

@jackkrawatt3908 3 года назад

@@MarioCrispino i try plc sim but dont work beacause the simulation cut off every connection to virtualize plc, but i chek the arduino function by this free software modbus pool www.modbustools.com/download.html , but to read the arduino modbus tcp you need to set data type: (R04) and starting address 101. the question now is to read many arduino tcp what we need to do? a loop to switch every arduino ip can work?

@MarioCrispino 3 года назад

Thanks for the feedback Jack