Commands from S+ operations to AC500 via Codesys OPC Server suddenly not working.
Please check with your CoDeSys OPC server with any OPC client.
Once you will be getting data into OPC client then would be easy to find out the exact problem.
If your OPC client also will not communicate then just ensure that Updated .sdb file is there in the 'Gateway File' folder.
Also ensure the communication and gateway setting into the CoDeSys OPC server.
Hope It Helps you.