I have a 90kW microgrid, with a Cerbo GX on the Victron side, an external Datamanager and 4 x Fronius Eco 27 units on the output of the Victrons. System is configured for modbus control, I can provide the settings I have used if necessary in case I have that wrong, and there is a condition activating an overide throttle function on the DNO Editor of the Fronius for when the generator is providing grid. I cannot get the Cerbo GX to "see" two of the Fronius inverters which is therefore giving an inaccurate reading on the Dashboard of the GX device. System seems to be throttling on command with the usual delay some of the time, but not all of the time. The entire system is connected via LAN and all cables tested, both sides are online. Comms between the Fronius units on the CAN protocol are perfect, and all DATCOMs are in state ok...I have read all the threads pertaining to this situation and applied all the recommendations and still cannot pick up the last two Fronius units. We have tried a new Cerbo GX as well with no difference. In the initial commissioning, all four units were picked up on the Cerbo - we had to replace three Recerbos on three of the slaves, after a surge, which was successfully accomplished. I am about to try replacing the last two inverters completely, to see if that makes any difference. Is there anyone there who can help me more please?