Fronius Modbus-TCP Dashboard
Fronius Modbus TCP Example
This example shows how to retrieve data from a Fronius Inverter (e.g. Fronius Symo). Raw data is converted to json and sent to dashboard controls.
The Modbus node polls every 10 seconds for the MPPT values (DC side) to get voltage, current and power of the two available photovoltaic strings.
In contrast to the existing Fronius REST API you can retrieve data via Modbus TCP every few seconds.
The dashboard visualization is just an example, you could also send the json object directly to a time series database or add a threshold detector or ...
Note that the example just reads the registers for the MPPT (I160). There are plenty more registers to read. For further information visit the Fronius web site at Modbus RTU/TCP
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data[19],\n 'S1_DCV' : data[20],\n 'S1_DCW' : data[21],\n 'S1_DCWH' : data[22],\n 'S1_Tms' : data[24],\n 'S1_Tmp' : data[26],\n 'S1_DCSt' : data[27],\n 'S1_DCEvt' : data[28],\n \n 'S2_ID' : data[30],\n //'S2_IDStr' : data[31],\n 'S2_DCA' : data[39],\n 'S2_DCV' : data[40],\n 'S2_DCW' : data[41],\n 'S2_DCWH' : data[42],\n 'S2_Tms' : data[44],\n 'S2_Tmp' : data[46],\n 'S2_DCSt' : data[47],\n 'S2_DCEvt' : data[48],\n}\n\n\nvar VFactor = 0.01;\nvar AFactor = 0.01;\nvar WFactor = 0.01;\nvar WHFactor = 1;\n\n\nvar result ={\n 'S1_V' : VFactor * raw.S1_DCV,\n 'S1_A' : AFactor * raw.S1_DCA,\n 'S1_W' : WFactor * raw.S1_DCW,\n 'S1_WH' : WHFactor * raw.S1_DCWH,\n 'S1_TimeStamp' : raw.S1_Tms,\n 'S1_T' : raw.S1_Tmp,\n 'S1_State' : raw.S1_DCSt,\n \n 'S2_V' : VFactor * raw.S2_DCV,\n 'S2_A' : AFactor * raw.S2_DCA,\n 'S2_W' : WFactor * raw.S2_DCW,\n 'S2_WH' : WHFactor * raw.S2_DCWH,\n 'S2_TimeStamp' : raw.S2_Tms,\n 'S2_T' : raw.S2_Tmp,\n 'S2_State' : raw.S2_DCSt,\n}\n\nmsg.payload = {\n data : data,\n 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