MPI configuration


Thread Starter


1) Can I use a twisted pair cable as an MPI? What configuration will be required?

2) Can 2 S7 300 PLC stations share data with each other using a twisted pair cable? What hardware configuration will be required?

Please reply soon.

Adrian Hernandez

Yes you can use twisted cable to configure an MPI network.

About the hardware you should try with the siemens bus connectors 6ES7

Good luck.

Use part number 6XV18300EH10 for the MPI wire. The connector to use is 6ES7972-0BA50-0XA0. This is what I recommend for a trouble free installation.

As far as communications between stations go, just make sure the 2 programs are inserted into the same project. Then right click the MPI network icon (from the simatic manager). Click on "Define Global Data", then insert the 2 CPU's.
Besure the 2 CPU's have different MPI addresses, also make sure they are networked (double click on the CPU in the hardware configuration).

I hope this helps

Jaroslaw Klak

1. Yes, you can use shielded TP cable. Connect pin 3 to 3 and pin 8 to 8. Max. cable length is 50m.
2. Yes, you can exchange data using global data (in STEP7 project manager click MPI network and choose menu Options-Define Global Data)