may/june 2017 ieee power & energy magazine 27 Utility Modem Utility SCADA DMS Data Communications Between ANM Subsystems Utility Modem/ D t Data Cell Utility SCADA Network "Existing SCADA: RTU Protocol and Conversations" figure 7. A high-level overview of ANM Strata implementation in the FICS project. er DNP3 over Ethernett DNP3 over Serial SGS External Field Switch ub sgs Comms Hub sgs Core Central ANM Controller Energy y Control Center Utility RTU DNP3 o ove overr Ethernet Modbus TCP Modbus TCP Generator Controller C Connect+ Hardwired Discrete I/O DER Site Circuit Breaker Connect+ Voltage Current Transducer Feeder with 2-MW Solar PVs Hardwired I/O DNP3 Serial LTC Relay Feeder with Constraint Location Utilityy Feeder Modem/ with Meter VT Data M Constraint Cell Location Utility Modem/ Data Mete Meter VT Cell Utility Modem/ Data Cell DNP3 over Ethernet Substation