Sigma S7 EtherNet/IP functions are licenced for use in a single compatible Siemens S7-1200 CPU and the licence is not transferrable to another CPU.
Siemens S7-1200 PLC IO Scanner communication.
Sigma S7 1200 EtherNet/IP Driver Licence -IO-Scanner
This product provides a totally integrated solution to easily allow a Siemens S7 PLC to communicate as an EtherNet/IP IO Scanner utilising the PLC systems existing Ethernet modules.