Using OPC-UA protocol on PLC, PLC actually acts as a OPC-UA Server and Cloud Rilheva is therefore a OPC-UA Client.
In case PLC has no internet connectivity, a gateway has to be used to establish communication.
In this setup, Client must reach the Server and this can be achieved in 2 ways:
- Enabling a VPN channel between PLC and RILHEVA IIoT Platform
- Expose PLC on Internet through a public IP, adding security rules for access control and accepting communication from Rilheva Cloud only.
We strongly recommend the first choice: using VPN grants higher communication security.