How to connect to a Codesys V3 PLC using UDP/IP

[Brendon.S]

Introduction:

When communicating with the “CODESYS V3 (Ethernet)” driver, we often suggest using TCP/IP to facilitate the connection. However, if you experience a communication delay at startup or if communication can only be resumed by unplugging and re-inserting the Ethernet cable, we may recommend using the “UDP/IP” protocol setting instead. Within this post, we demonstrate how to setup and use this setting.

Software Version:

EasyBuilder Pro 6.09.01.556
Note: Certain options within objects or windows may be placed in other locations in different versions. The example below was designed with 6.09.01.556.

Instructions:

1. Within the “Device settings” menu, select the “Settings…” button:
   

   

2. Within the “Protocol” drop-down list select “V3 UDP/IP” or “V3 UDP/IP Communication Optimum”:
   

   

3. Select the “Scan Network…” option while the PC is connected to the PLC:
   

   

4. Choose the network adapter that is connected to the PLC:
   

   

5. When found, select the CODESYS plc and click “OK”:
   

   

6. EasyBuilder Pro will then assign the PLC’s “IP address”, “Port no”, and the “Source port no” to the correct settings:
   

   

7. Click “Ok” to close the “Device settings” menu.

8. Use the “Get Tag Info…” or “Import Tags…” button to import PLC tags: