Connections

CODESYS Username & Password

These fields are used to authenticate the WebSocket connection once it is established with the PLC.

Purpose

The CODESYS Username and Password must match the credentials expected by the CODESYS WebSocket server.

Default Credentials

Provided by the CODESYS backend library:

• Username: Administrator
• Password: Administrator

If authentication fails:

• The HMI will not be able to access PLC variables
• No data updates will be received

Important

To enable WebSocket communication on the PLC, you must instantiate the WebSocket server interface in your CODESYS code.

Add the following line (typically in PLC_PRG or a global initialization block):

wsINST : PLCVisu.wsInitFB; // Important instance, required to run the WebSocket server