How to get data from SIMATIC S7-300 to PC

Hi all,

I am so sorry if the same topic already exists.

I would like to ask you, what is easiest way to get data from SIMATIC S7-300.

I found out the possible way is OPC, but there is a lot of setting at PLC configuration in my opinion.

1. Is there any way how to get data from PLC without reconfigurate PLC project?

2. Is possible to use DDE conection?

3. Could you please recommend me some kind of instruction manual or tutorial for a beginer?

Thank you in advance for your advices.

Jiri Hanka

Hanka Jiri

Hi all,

1. Is there any way how to get data from PLC without reconfigurate PLC project?

2. Is possible to use DDE conection?

3. Could you please recommend me some kind of instruction manual or tutorial for a beginer?

 Hello Jiri;

Before you begin such a project you must answer certain questions: how much data do you want to send from the S7-300, at what interval, what link will you use between the PLC and the PC (Ethernet?)  and what container will you have in the PC to retrieve and organize the data?

There are various ways to communicate with a PC, as you can see from the first link below. Specific functions exist for TCP/IP, UDP,Profinet, Send-Receive data transfers. But OPC is thone of the most common (and easier) way to exchange data between PLCs and PCs. 

Note that DDE is considered a primitive development of OPC, it was much slower and difficult to setup. Use OPC instead. Look it up, for example here:

https://control.com/thread/1026174662

If your PC container is Excel, for example, there are S7 controls you can download and incorporate to Excel to make exchanges using OPC very easy. Or you can consider OPC DA exchanges, as explained in section 3,2 of the first link below..

If you are conversant with Visual Basic.NET, you could develop your own GUI  and OPC client to gather data from a S7-300; look into the third link below.

- SIMATIC NET PC software Industrial Communication with PG/PC Volume 1 - Basics System Manual

https://support.industry.siemens.com/cs/ww/en/view/77376110

See section 3,.2, Data Access

- How do you incorporate the S7 controls in Microsoft Excel?

https://support.industry.siemens.com/cs/ww/en/view/23931842

- OPC Communication via the SEND/RECEIVE Protocol with a Visual Basic .NET OPC Client

https://support.industry.siemens.com/cs/ww/en/view/21523291

Tell us if these options do not meet your requirements, of if you need more help.

Hope this helps,

Daniel Chartier

Hello Hanka,

If you want to store and process only few, essential PLC data on PCs and do not need opc, you can use the TCP Fileserver.

https://support.industry.siemens.com/cs/ww/en/view/109475508

• the STEP 7 blocks "TcpClient" in the individual S7 stations, which prepare the data and send it to the PC station.
• The "TCP-Fileserver" PC program receives the data from the SIMATIC stations and saves them line by line in the files.
  

The solution was realized for S7-300, S7-1200 and S7-1500 CPUs.

Perhaps another possibility for you (and much easier:-))

Hello

What do you want to do with the PLC Data on PC.

If you use a HMI Software like WInCC Advanced RT its quite easy to gt the Data because it has a Communication channel inside.

I also wrote a .Net Program for a user sepcific application and this works with a communication framework which culd speak S7 "language".

In your case the S7300 can be used with classic Put/GEt RFC1006 Communication.

There are a few solution online. like Snap7 for example.

Of course OPC does also work, but you need an OPC Server that can communicate with the S7.

Bye Murof

Hi!

Is there any site where I still find these kind of information in 2023?

Thx,
Jonatan Herczeg

HungarianHJ

Hi!

Is there any site where I still find these kind of information in 2023?

Thx,
Jonatan Herczeg

 Hello HungarianHJ

The functionalities for S7300 do not have changed since the last posts. So the information are still present.

Bye Murof