Vijeo Citect Lite license have the following limitations.
1. No Networking (this means they cannot be made redundant).
2. No Connectivity (this means no applications can access the CTAPI or OPC Server).
3. Only the OPC Client is supported.
4. No additional drivers supported.
Vijeo Citect Lite only supports the OPC driver. Multiple OPC Servers can be connected like Schneider Electric OPC Server (OFS) or third party OPC Server.
Vijeo Citect Lite addresses the OEM marketplace where it is rare to get two different PLC manufacturers on the same piece of equipment. Also there are no networks or upper level connectivity, as it is more of a simple interface to a machine.