Siemens S7 1200 Modbus TCP/IP Communication with Arduino

Simple communication between Siemens S7 1200 and Windows Modbus client

Step by step guide, project archive provided

PLC program archive, TIA V15.1

Arduino program

Siemens TIA Portal V15.1 30 days Trial version

Modbus Tool for testing communication

Introduction to Modbus

How do you establish a Modbus/TCP communication from a SIMATIC S7-300/S7-400 and where can you find further information?

How do you use the blocks for MODBUS/TCP communication via the integrated PROFINET interface of the CPU in STEP 7 Professional (TIA Portal)?

Modbus General Description

[EmbeddedGate]

ModbusIP_ENC28J60, where to find this library?

[guillermobeldagarcia]

Hello, thanks for your video. Im trying to make it work on a Mega but the program get stuck in the mb.config line. I have tried almost everything I found on the internet but it wont work. Can you give me some advices please? Thank you.

[harunaltntas]

Awesome! After trying for so long! Couple of changes I made: DB2 Send, remote and local ports changed to 502. I am using w5500 ethernet shield (MKR ETH), so the libraries I used are SPI.h Ethernet.h ModbusEthernet.h. There are several more changes in the declarations, but finally it works!

[szolek]

Really nice tutorial, thanks a lot for your time. I have question, why sometimes we have to add 4000 or 3000 (depend on the type of register) to the server data address, and sometimes not, for exp. you did not add, but I saw on the few turotials people added. Does that depand on the modbus library version?

[ERGU]

hello, there are some esp32 modules that have ethernet port. Can we use that port to modbus communication with plc and then upload data to the internet with help of the esp32's ability to connect wifi.?

[Doanquang]

why do i download the modbus library file and add it via IDE, it says the file is not valid

[AnatoliiOrestism]

My friend, thank you for the video.
Everything was clear until 6:28 ( you work in DB2, ok. Then you jump to arduino to see the IP, and when you come back to DB2 THERE A LOT OF NEW VALUES CAME FROM NOWHERE ( I am beginner in TIA). So at 6:28 I see DB2 with some values, but 6:33 the same DB2 has 16739101 new values. How? From where ? I am desperate ….

[PatjJasco]

Can you make the same video with a siemens Logo 8 ?

[ouailmakhebi]

When i start the script for esp (with if (c=4) (send 40 for reg1 for exemple and if c=5 send 30 for regs1 ) i have the same value in plc data block all time ( with c=5 i have 40 also ) what the prblm!!

[deepakkumawat]

Can we use esp with w5500 to connect with Siemens 1200

[DuyNguyen-kjry]

Thank you for your video
But i have issue. I use a IP for Ethenet Shield and use mac [ ] same you and make code same you. However Status of MB_CLIENT show is 16#7002. Disconnect Arduino with PLC
You have any solve for me. Thank you so much

[hoangquocphong]

Hello Sir, Thanks for your Video, I have a question about the connect PLC S71200 with Arduino. How to connect 2 Arduino with PLC S71200 using Modbus TCP/IP? Please Answer my disturbance..

[ICSolucoesEmAutomacao]

Hey, buddy! Can you help me, please? I'm following the example of your video, but when I insert in Step 7 the second block Modbus Client and Do the settings to write in arduino nothing happens. My second Modbus communication block never works... The "Done" status of the block always becomes false.... Would you have any tips to give me? I'm using an S71200 with an Arduino and a shild ethernet.

[viktorjanjic]

Hi, thanks for video. Can you say how you physically connect PLC and arduino? Did you use only RJ45 between these two devices?

[anismahmoudbacha]

Thanks for the video. I just want to know if such a communication can be established using a virtual plc ( Plcsim or Plcsim Advanced) instead of a real physical S7-1200.

[plant_paradox]

For PLCs with firmware lower than V4.0, the correct protection settings are: No protection

[zamborichard]

Hello Sir! Can you provide some wiring information about ENC28J60 for arduino mega? I searched everywhere and found nothing :(

[DomenicoMadeo]

hello, I downloaded your files and only change my IP, but the blocks are both in error, can you help me understand why? thanks

[brendancadec]

Any chance you did this with a M340?? ahah. still trying to figure out how to send data to Arduino using a M340? any help is welcome. Thank you.

[phloxic]

Does that work with the basic Arduino AG ETHERNET SHIELD 2 ?