Configuring Modbus TCP Client

Activating the Modbus TCP Client in the system services

The Modbus TCP Client is deactivated by default. To activate Modbus TCP Client, proceed as follows: 

  • Log in to the WBM. 

Return to topicHow do I get to the WBM again? Click here for more information... 

Establishing a connection to the Web-based Management (WBM):

  • Open a web browser on your computer.
  • In the address field, enter the URL https://<IP-address-of-the-controller>/wbm,
    for example: https://192.168.1.10/wbm.

For further information, see WBM.

  • Open the System services page (System → System services) in the WBM. 
  • Activate the toggle switch of the PLCnext Store .
  • Click the SAVE PAGE & RESTART button. 

Adding the firewall rules

For a successful connection, you must add the appropriate firewall rules.

To add the firewall rules, proceed as follows:

  • Open the Firewall page (Security → Firewall). 
  • Open the IP INPUT RULES tab.
  • Provide the following information:
  • Open the IP OUTPUT RULES tab.
  • Provide the following information:
  • Click the SAVE & APPLY PAGE button.

For further information on Modbus TCP Client, refer to the main PLCnext Technology ‑ Info Center.

 

 

• Published/reviewed: 2025-06-27 • Revision 018 •