- OPC Server
What is the difference between TCP and UDP?
TCP and UDP are transport layer protocols, and they are used according to system requirements.
For detail technical information on TCP/UDP, please refer to other articles and books.
In using these protocol in OPC server, each features are described below.
- Used when reliable communication is required.
- To secure a session with the connected device, connection may not be possible if the port is occupied by other software.
- There is no need to set the number of retries on the OPC server side because it has a retransmission control function.
*When TCP protocol is selected, it is recommended to set the timeout to "31.5 seconds or more" and the retry count to "0" on Ethernet port setting.
- Used when high speed communication is required.
- To not secure a session with the connected device, one port can communicate with multiple software.
- Packet loss may occur.
- There is no retransmission control function, and retry setting is required.