Hi

I have a S7-300 panel with CPU 312 hardware configuration. Currently, this panel is connected to a PC (WINCC 7) via a MPI-USB link.

Is it possible or is there a way to connect two PC (on each PC, WINCC is installed) to the CPU with MPI link?

I don’t want to add the CP card to the panel and establishing the connection over the Ethernet.

Hi,

I know these FAQ - hope this helps you:

How do you configure a connection between WinCC flexible Runtime (PC/Panel) and a SIMATIC S7-300/S7400 via PROFIBUS/MPI?

 Regards,

Towome

 but i have Wincc 7.1 not Wincc flexible.

Towome

Hi,

I know these FAQ - hope this helps you:

How do you configure a connection between WinCC flexible Runtime (PC/Panel) and a SIMATIC S7-300/S7400 via PROFIBUS/MPI?

 Regards,

Towome

Can you explain the wiring of that, how i can take two link (wire) of one port on CP 5612?

RIAN Che

Please check the LINK HERE.

MPI will support 31 nodes but length is limited to 50 meter.  PC's must have a CP card [like CP 5612]. 

Hello sajjad;

MPI is a subset of Profibus networks, and uses the same RS-485 cabling infrastructure, daisy-chaining the elements of a network.

RS-485 cable (shilded twisted-pair) and sub-D 9-pin connectors are easy and cheap to locate (connect pins 3-5-8 on each connector), and termination resistance can be implemented with a bit of thought.

But generally we prefer using Profibus connectors and cables, a bit more expensive but all elements are certified (so they will work as expected without a problem) and termination circuits are already built-in. See the attachment for an illustration, and this list of Profibus connectors part numbers (from Siemens; there are many manufacturers offering similar connectors, such as HelmHoltz, ABB,  Phoenix Contacts...).

Where can you find information on the dimensions of PROFIBUS connectors and where can you find dimensioned drawings of the PROFIBUS connectors?

https://support.industry.siemens.com/cs/fr/en/view/19425126

Hope this helps,

Daniel Chartier