Hi All, Im also working on UDP using Studio5000 and AB 1769-L33ERM. I follow the manual of AB but still not able to make it work. I already created the User Defined Data Types (Socket Address,etc) for UDP communication. Im stuck at the first step - CREATE SOCKET. It always show different errors when I configure it. The process are: 1. Create Socket 2. Open Connection 3. Write My Only objective - just give commands to a third party device using AB PLC. I'm nearly giving up, If someone here can please share a .ACD file configuration on how the UDP for Allen Bradley PLC works - you are my savior!