Modbus Cross-Communication: Activating Different Port Numbers in the Controller Firewall

  1. An Application template needs to have been created in the WAGO Solution Builder Plug-in software to allow Modbus cross-communication.
  2. The Application template must be available as an .atpkg file.
  1. Select the “Applications” menu item.
  2. Click [Select File].
  3. Upload the Application template as an .atpkg file.
  4. Drag and drop the Application template to assign it to a higher-level entity of type “Controller” (for example, “Floor distributor”).
  5. An additional entity of type “Controller” is created each time a new assignment is made by dragging and dropping.
  6. Repeat step 4 two times in a row to create a total of three entities of type “Controller.”
  7. Select the “Cross-communication” menu item.
  8. Configure two cross-communication links for the three new entities of type “Controller” (see 8 Configuring Cross-Communication).
  9. For each cross-communication link, select Modbus TCP from the “Type” drop-down menu.
  10. From the “Connector” drop-down menu, select a connector for each cross-communication link you defined in the WAGO Solution Builder Plug-in software.
  11. Assign a unique port number for each cross-communication link. These port numbers must be different.


  12. Select the “Configuration” menu item.
  13. In the tree structure, select one of the newly created entities of type “Controller.”
  14. Select the “CONTROLLER“ tab.
  15. Select the “WBM – Web-Based-Management” item.
  16. Verify that the assigned port numbers are listed under “Controller Settings.”
  1. The assigned port numbers will be activated the next time the controller firewall is synchronized.
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