Distributed network with s7-300(using IM 360/361)

Hello everyone,

I am trying to build a master slave network using s-7-300 315-2 pn/dp or s-7-300 315-2 dp. But before buying components I want to make sure that my plan will work. I am also thinking to use Interface module 360 or 361.

Issue-1: I was wondering if I can have a central s-7 300 and then place the Interface module, i/o modules without any CPU to different area. My pan is to communicate through interface module to the mother plc. If my assumption is wrong please give necessary advice.

Issue-2: Can I program for profibus dp in step 7 and how address works for different node.

Issue-3: Can I build tree topology using profibus dp? Refer necessary manual and example to build one.

Issue-4: Refer to manual on programming profibus dp for addressing.

Hello nayeem;

The screenshot below shows the difference between expansion modules (with IM 360/361 pairs) and distributed I/O stations, using the integrated Profibus-DP port on the 2 CPUs you mention.

 You can look at chapter 8 "Interface Modules" in the S7-300 Module Data manual to get the specifications for an IM 360/361 used to create expansion racks for an S7-300 CPU. The special cable 368 for IM 360/361 is limited to 10 m max, and the IM 360/361 are used mostly to connect additional S7-300 modules is separate but close-by cabinets.

https://support.industry.siemens.com/cs/ww/en/view/8859629

Profibus-DP (or Profinet) networks use the integrated Profibus (or Profinet) ports of the CPU, or specialized CPs, such as CP 342-5 for Profibus and CP 343-1 for Profinet, to connect to distirbuted I/O stations that can extend much further than expansion rack scenarios, and use different types of I/O families depending on the local requirements. You can have an idea of available types of ET 200 (distributed I/O) stations in this document;

https://www.elfadistrelec.no/Web/Downloads/_b/ro/siemens_simatic-et200_eng_bro.pdf

So, after this introduction, to your specific questions:

-1. You can communicate as you describe with distributed I/O stations through Profibus (or Profinet), as discussed before. You can even connect 2 Profibus masters on Profibus with a DP/DP coupler, or on Profinet with a PN/PN coupler. Note that there are limitations on what the second CPU can do with the I/O, we can discuss this later, when you are more familiar with Profibus-DP and Profinet..

These documents will show you the range of Profibus and Profinet hardware available for connections on the plant floor (we can help you select the materials when you have advanced further in your project deployment):

SIMATIC NET PROFIBUS Network Manual System Manual

https://support.industry.siemens.com/cs/ww/en/view/35222591

SIMATIC NET: Industrial Ethernet/PROFINET Industrial Ethernet

https://support.industry.siemens.com/cs/ww/en/view/27069465

-2. The I/O addressing for Profibus-DP or Profinet modules is the same as if the I/O were in the same rack as the CPU. The I/O is seen as part of the process image or the peripheral modules of the CPU.(see answer to point 4)

-3. This training manual will show you step-by-step example of setting up a Profibus-DP connection between a S7-315-2DP with a ET 200M station (ET 200M: IM 153-2 with S7-300 I/O modules):

https://www.automation.siemens.com/sce-static/learning-training-documents/classic/field-bus-systems/d04-cpu315-et200m-en.pdf

-4.The document cited above, on page 15, for example, shows how the remote station DI and DO modules (on the ET 200M) are attributed "normal" addresses inside the process image tables of the CPU.

You will find more detailed information in the following manual:

SIMATIC Configuring Hardware and Communication Connections STEP 7

https://support.industry.siemens.com/cs/ww/en/view/109751824

Hope this helps,

Daniel Chartier

dchartier

-3. Training manual will show you step-by-step example of setting up a Profibus-DP connection between a S7-315-2DP with a ET 200M station (ET 200M: IM 153-2 with S7-300 I/O modules):

https://www.automation.siemens.com/sce-static/learning-training-documents/classic/field-bus-systems/d04-cpu315-et200m-en.pdf

 Thank you for your reply. Could you give me a manual that uses step 7 software instead of tia?

Hello Nayeem;

I am surprised by your request, the document you are showing is designed with Simatic Manager (Step 7 v5.x). The screenshots shown were probably developed with an older version of Step 7, possibly v5.3 or v5.4, but they are still an excellent guide even if you use Step 7 v5.6.

Maybe you were asking for different information?

In any case, Siemens has prepared a new access point for its training materials, the Simatic SCE training portal:

https://new.siemens.com/global/en/company/sustainability/education/sce/learning-training-documents.html

For S7-300 CPUs with Simatic Manager documents, open the Classic Modules. If you look in section D, Industrial Field Bus Systems, you will find the document you were pointing to today.

For S7-1200 and s7-1500 CPUs with TIA Portal, open the TIA Portal link.

PCS 7 and LOGO! training is also available, and you can find many other training tutorials in that SCE page that could interest you when you decide to expand your knowledge of Siemens automation equipment: RFID transmitters, different Sinamics drives, communications configurations and even Digital Twin programming.

Hope this helps,

Daniel Chartier