{ "manufacturer": "huawei", "model": "SUN2000 8-28KTL", "device": "SUN2000 8-28KTL", "category": "Altro", "protocol": "modbus", "version": "v1", "firmware": null, "verification": "IMPORTED", "isDemo": false, "source": { "title": "Import PDF HUAWEI_SUN2000_245KTL28KTL_MODBUS_Interface_Definitions_20150715_JP.pdf", "url": null, "documentRef": null, "revision": null }, "generatedAt": "2026-09-21T14:44:21.358Z", "registers": [ { "address": "40002", "addressNumeric": 1, "signal": "grid_code", "name": "Grid code", "description": "Range 0-23.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40004", "addressNumeric": 3, "signal": "mppt_setting", "name": "MPPT setting", "description": "0=Disable, 1=Enable.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ_WRITE", "endianness": null, "group": null, 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"overfrequency_deration_exit_threshold", "name": "Overfrequency deration exit threshold", "description": "Range 49.9-51.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 0.01, "offset": 0, "unit": "Hz", "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40036", "addressNumeric": 35, "signal": "overfrequency_deration_recovery_gradient", "name": "Overfrequency deration recovery gradient", "description": "Range 5-20.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "%/min", "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40037", "addressNumeric": 36, "signal": "q_u_characteristic_curve_mode", "name": "Q-U characteristic curve mode", "description": "Range 0-1.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40038", "addressNumeric": 37, "signal": "q_u_dispatch_trigger_power_percent", "name": "Q-U dispatch trigger power percent", "description": "Range 10-100.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "%", "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40041", "addressNumeric": 40, "signal": "soft_startup_time_after_grid_failure", "name": "Soft startup time after grid failure", "description": "Range 20-800.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "s", "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40051", "addressNumeric": 50, "signal": "lvrt", "name": "LVRT", "description": "00=Disable, 01=Enable.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40052", "addressNumeric": 51, "signal": 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"unit": "ms", "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40066", "addressNumeric": 65, "signal": "level_1_of_prot", "name": "Level-1 OF prot.", "description": "Range 100%-115%Fn.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 0.01, "offset": 0, "unit": "Hz", "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40067", "addressNumeric": 66, "signal": "level_2_of_prot_time_nome_cosi_nel_documento", "name": "Level-2 OF prot. time (nome cosi' nel documento)", "description": "Range 50-600000. ATTENZIONE: il documento chiama questo registro \"Level-2 OF prot. time\" ma la sua posizione (subito dopo Level-1 OF prot. a 40066, prima di Level-2 OF prot. a 40069) suggerisce che sia in realta' il tempo di Level-1. 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"name": "Reactive power adjustment time", "description": "Range 5-120.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": "s", "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40200", "addressNumeric": 199, "signal": "power_on", "name": "Power on", "description": "Comando, valore fisso 0.", "functionCode": 6, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40201", "addressNumeric": 200, "signal": "power_off", "name": "Power off", "description": "Comando, valore fisso 0.", "functionCode": 6, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "WRITE", "endianness": null, "group": null, "notes": null }, { "address": "40234", "addressNumeric": 233, "signal": "active_power_deration_percent", "name": "Active power deration percent", "description": "Range 0-100.", 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"description": "Per tutte le classi di potenza.", "functionCode": 3, "datatype": "int16", "length": 1, "scale": 0.01, "offset": 0, "unit": "A", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40523", "addressNumeric": 522, "signal": "co2_reduction", "name": "CO2 reduction", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 0.01, "offset": 0, "unit": "kg", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40525", "addressNumeric": 524, "signal": "active_power", "name": "Active power", "description": null, "functionCode": 3, "datatype": "int32", "length": 2, "scale": 0.001, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40527", "addressNumeric": 526, "signal": "uab", "name": "Uab", "description": null, "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 0.01, "offset": 0, "unit": "V", "access": "READ", 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"functionCode": 3, "datatype": "int16", "length": 1, "scale": 0.1, "offset": 0, "unit": "°C", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40544", "addressNumeric": 543, "signal": "reactive_output_power", "name": "Reactive output power", "description": null, "functionCode": 3, "datatype": "int32", "length": 2, "scale": 0.001, "offset": 0, "unit": "kVar", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40546", "addressNumeric": 545, "signal": "frequency", "name": "Frequency", "description": null, "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 0.01, "offset": 0, "unit": "Hz", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40560", "addressNumeric": 559, "signal": "e_total", "name": "E-Total", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 0.01, "offset": 0, "unit": "kWh", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40562", "addressNumeric": 561, "signal": "current_day_yield", "name": "Current-day yield", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 0.01, "offset": 0, "unit": "kWh", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40572", "addressNumeric": 571, "signal": "ia", "name": "Ia", "description": null, "functionCode": 3, "datatype": "int16", "length": 1, "scale": 0.01, "offset": 0, "unit": "A", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40573", "addressNumeric": 572, "signal": "ib", "name": "Ib", "description": null, "functionCode": 3, "datatype": "int16", "length": 1, "scale": 0.01, "offset": 0, "unit": "A", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40574", "addressNumeric": 573, "signal": "ic", "name": "Ic", "description": null, "functionCode": 3, "datatype": "int16", "length": 1, "scale": 0.01, "offset": 0, "unit": "A", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40613", "addressNumeric": 612, "signal": "inverter_start_time", "name": "Inverter start time", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 1, "offset": 0, "unit": "s", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40615", "addressNumeric": 614, "signal": "inverter_shutdown_time", "name": "Inverter shutdown time", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 1, "offset": 0, "unit": "s", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40685", "addressNumeric": 684, "signal": "inverter_efficiency", "name": "Inverter efficiency", "description": null, "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 0.01, "offset": 0, "unit": "%", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40686", "addressNumeric": 685, "signal": "mppt1_total_input_power", "name": "MPPT1 total input power", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 0.001, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40688", "addressNumeric": 687, "signal": "mppt2_total_input_power", "name": "MPPT2 total input power", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 0.001, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40690", "addressNumeric": 689, "signal": "mppt3_total_input_power", "name": "MPPT3 total input power", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 0.001, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40692", "addressNumeric": 691, "signal": "total_input_power", "name": "Total input power", "description": null, "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 0.001, "offset": 0, "unit": "kW", "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40696", "addressNumeric": 695, "signal": "zero_voltage_ride_through_protection", "name": "Zero voltage ride through protection", "description": "0=no, 1=yes.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40697", "addressNumeric": 696, "signal": "lvrt_protection", "name": "LVRT protection", "description": "0=no, 1=yes.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40698", "addressNumeric": 697, "signal": "anti_islanding", "name": "Anti-islanding", "description": "0=no, 1=yes.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40699", "addressNumeric": 698, "signal": "locking", "name": "Locking", "description": "0=lock, 1=not lock.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40710", "addressNumeric": 709, "signal": "rated_inverter_power", "name": "Rated inverter power", "description": "Codice modello. Vedi tabella \"Mapping Between Inverter Models and Rated Power\" nel documento originale: 0=20KTL, 1=17KTL, 2=15KTL, 3=12KTL, 4=10KTL, 5=8KTL, 9=500KTL, 16=24.5KTL, 17=23KTL, 18=28KTL, 19=33KTL, 20=40KTL.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40713", "addressNumeric": 712, "signal": "esn", "name": "ESN", "description": "Stringa ASCII multi-registro (MLD), 10 registri.", "functionCode": 3, "datatype": "string", "length": null, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40789", "addressNumeric": 788, "signal": "hardware_version", "name": "Hardware version", "description": "Stringa ASCII multi-registro (MLD), 15 registri.", "functionCode": 3, "datatype": "string", "length": null, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40819", "addressNumeric": 818, "signal": "software_version", "name": "Software version", "description": "Stringa ASCII multi-registro (MLD), 15 registri.", "functionCode": 3, "datatype": "string", "length": null, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40834", "addressNumeric": 833, "signal": "modbus_protocol_version", "name": "ModBus protocol version", "description": "Stringa ASCII multi-registro (MLD), 15 registri.", "functionCode": 3, "datatype": "string", "length": null, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40931", "addressNumeric": 930, "signal": "inverter_on_off_status", "name": "Inverter on/off status", "description": "Bit1: 1=grid-tied, 0=shutdown.", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40939", "addressNumeric": 938, "signal": "inverter_status", "name": "Inverter status", "description": "0x0000=Idle:Initializing, 0x0001=Idle:ISO Detecting, 0x0002=Idle:Irradiation Detecting, 0x0100=Starting, 0x0200=On-grid, 0x0201=On-grid:Limited, 0x0300=Shutdown:Abnormal, 0x0301=Shutdown:Forced, 0x0401=Grid Dispatch:cosψ-P Curve, 0x0402=Grid Dispatch:Q-U Curve, 0xA000=Idle:No Irradiation.", "functionCode": 3, "datatype": "uint16", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "40000", "addressNumeric": 40000, "signal": "date_and_time_synchronization", "name": "Date and time synchronization", "description": "Range 0-3155759999.", "functionCode": 3, "datatype": "uint32", "length": 2, "scale": 1, "offset": 0, "unit": null, "access": "READ_WRITE", "endianness": null, "group": null, "notes": null }, { "address": "50000", "addressNumeric": 50000, "signal": "alarm_word_0x50000", "name": "Alarm word (0x50000)", "description": "bit0x01 Abnormal String1(AlarmID106,CauseID1,Warning); bit0x02 Abnormal String2(107,1,Warning); bit0x03 Abnormal String3(108,1,Warning); bit0x04 Abnormal String4(109,1,Warning); bit0x05 Abnormal String5(110,1,Warning); bit0x06 Abnormal String6(111,1,Warning); bit0x0A Software Ver. Unmatch(504,1,Minor); bit0x0C Upgrade Failed(505,1,Major); bit0x0D Flash Fault(61440,1,Minor).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50001", "addressNumeric": 50001, "signal": "alarm_word_0x50001", "name": "Alarm word (0x50001)", "description": "bit0x01 Software Ver. Unmatch(504,2,Minor); bit0x02 Software Ver. Unmatch(504,3,Minor); bit0x03 System Fault(400,1,Major); bit0x06 Abnormal Inv. Circuit(202,20,Major); bit0x07 Abnormal Resid. Cur.(318,1,Major); bit0x08 Cabinet Overtemp.(321,1,Major); bit0x09 Cabinet Overtemp.(321,2,Major); bit0x0F System Fault(400,5,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50002", "addressNumeric": 50002, "signal": "alarm_word_0x50002", "name": "Alarm word (0x50002)", "description": "bit0x00 Low Insulation Res.(313,1,Major); bit0x06 Cabinet Overtemp.(321,6,Major); bit0x09 String 3 Reversed(122,1,Warning); bit0x0F System Fault(400,23,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50003", "addressNumeric": 50003, "signal": "alarm_word_0x50003", "name": "Alarm word (0x50003)", "description": "bit0x01 String1 Reversed(120,1,Warning); bit0x02 String2 Reversed(121,1,Warning); bit0x06 String4 Reversed(123,1,Warning); bit0x07 String5 Reversed(124,1,Warning); bit0x08 String6 Reversed(125,1,Warning); bit0x09 High DC Input Volt.(103,1,Major); bit0x0A High DC Input Volt.(103,2,Major); bit0x0B High DC Input Volt.(103,3,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50004", "addressNumeric": 50004, "signal": "alarm_word_0x50004", "name": "Alarm word (0x50004)", "description": "bit0x01 Cabinet Overtemp.(321,14,Major); bit0x02 String1 Reversed(120,2,Warning); bit0x03 String2 Reversed(121,2,Warning); bit0x0C String3 Reversed(122,2,Warning); bit0x0D String4 Reversed(123,2,Warning); bit0x0E String5 Reversed(124,2,Warning); bit0x0F String6 Reversed(125,2,Warning).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50005", "addressNumeric": 50005, "signal": "alarm_word_0x50005", "name": "Alarm word (0x50005)", "description": "bit0x01 Abnormal DC Circuit(200,3,Major); bit0x02 Abnormal Auxiliary Power Supply(410,4,Major); bit0x04 Abnormal DC Circuit(200,10,Major); bit0x05 Abnormal DC Circuit(200,11,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50006", "addressNumeric": 50006, "signal": "alarm_word_0x50006", "name": "Alarm word (0x50006)", "description": "bit0x00 Abnormal Inv. Circuit(202,4,Major); bit0x06 System Fault(400,3,Major); bit0x0A Abnormal Inv. Circuit(202,13,Major); bit0x0C Abnormal Inv. Circuit(202,14,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50007", "addressNumeric": 50007, "signal": "alarm_word_0x50007", "name": "Alarm word (0x50007)", "description": "bit0x01 Abnormal Inv. Circuit(202,16,Major); bit0x04 Anti-islanding(300,1,Warning); bit0x05 System Fault(400,21,Major); bit0x07 Abnormal Grid Volt. ABupper(301,16,Major); bit0x04 Grid Volt. B>upper(301,17,Major); bit0x05 Grid Volt. C>upper(301,18,Major); bit0x06 Grid freq>standard(305,2,Major); bit0x07 Grid frequpper threshold(301,26,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50009", "addressNumeric": 50009, "signal": "alarm_word_0x50009", "name": "Alarm word (0x50009)", "description": "bit0x00 Output A phase low impedance/short(301,31,Major); bit0x01 Output B phase low impedance/short(301,32,Major); bit0x02 Output C phase low impedance/short(301,33,Major); bit0x06 System Fault(400,11,Major); bit0x08 Grid Volt. above 10-min OV threshold(301,19,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null }, { "address": "50011", "addressNumeric": 50011, "signal": "alarm_word_0x50011", "name": "Alarm word (0x50011)", "description": "bit0x0A AB line voltage>upper(301,20,Major); bit0x0B BC line voltage>upper(301,21,Major); bit0x0C CA line voltage>upper(301,22,Major).", "functionCode": 3, "datatype": "bitfield", "length": 1, "scale": 1, "offset": 0, "unit": null, "access": "READ", "endianness": null, "group": null, "notes": null } ] }