How to Change the MPI Node Address For a Siemens S7-300 PLC
- January 16, 2017
- Posted by: marlenedubois
- Category: CPR Training
I have seven Siemens S7-300 PLCs connected together using the MPI (Multi Point Interface) interface. The Siemens MPI protocol is actually used by Siemens PLCs to communicate with external devices. I want to rename each of the seven PLCs. Here are the steps to accomplish that will task.
First, connect your MPI cable to the first PLC. I will be connecting my laptop to each PLC individually. Power up the PLC along with open Simatic Manager. The “brand-new Project” Wizard window will open. Just click Cancel to close the window. right now click the Accessible Nodes icon on the toolbar. A window will open showing the identification of the PLC you are connected to. My window is actually showing MPI = 2(directly). Make a note of This particular address along with close the window.
Next we need to download a hardware configuration to the PLC. This particular is actually where we will rename the PLC node address. There are probably a couple of different ways to do This particular – following is actually how I accomplish This particular. All seven of my PLCs are the same design; therefore, I am using the same hardware configuration. For the obvious reasons, I want to give each a different MPI node address. I have a project file that will contains all seven of my PLC programs along with one hardware configuration file. I open the one hardware configuration file, along with then double click Hardware within the right hand window. This particular will open the HW Configuration window. In This particular window you should see your PLC with its MPI address given.
Remember when we clicked the Accessible Nodes icon along with saw MPI = 2(directly)? My Hardware Configuration Window is actually showing a MPI address of 7. Place your mouse cursor on the 7 along with double click. Your CPU Properties window will open. that will should open to the General tab. Look down along with you will see Interface Type MPI with an address of 7. Click Properties along with the MPI interface Properties window will open. Using the pull down menu, choose your MPI node address along with make sure the MPI (1) 187.5kbps is actually highlighted along with click OK. You are right now back on the CPU Properties window where you will see your address has changed. Click OK along with you will go back to the Hard Ware window where you can verify your MPI node address has changed.
You will right now click the Save along with Compile icon along with then click the download icon. The Select Target Module window will open. Click OK along with the Select Node Address window will open. Here you will see the MPI node address you assigned earlier. You will need to click the View button right below This particular. You will see the current node address appear, This particular should be the same as what you saw earlier when you clicked the Accessible Nodes icon. Simply click on This particular number along with you will see that will appear within the MPI address slot under the Enter connection to target station. Click OK along with the Download to Module window will open. Click OK along with the Stop Target Modules window will open. Click OK along with the “Do you want to start the module?” window will open. Click Yes.
right now go back to the SIMATIC Manager window along with click the accessible nodes icon. You will see your brand-new MPI node address. You can see This particular same article with pictures at http://www.moorerobotics.com.