Transfering configuration to IEDs using IEC 61850
The standardised configuration process is defined in part IEC 61850-6 (along with the SCL itself). In summary:


Each device should have an IED Capability Description (ICD) file, possibly generated by the IED online, or provided by the vendor.
A software tool should be used to manage and combine multiple ICD files into the full SCD file, and set up things like GOOSE and SV communications between IEDs.
Each IED should be configured with the full SCD file. It is possible to transfer files using MMS, but I think it is vendor-specific how the IED is configured from the SCD file.