{
 "manufacturer": "Eastron",
 "manufacturer_slug": "eastron",
 "model": "SDM630-DI",
 "model_slug": "sdm630-di",
 "short_model": "SDM630-DI",
 "aliases": [
  "SDM630 DI"
 ],
 "equipment_type": "Energy meter",
 "applies_to": "Eastron SDM630-DI three-phase DIN-rail meter (100 A direct, two digital inputs, RS485 Modbus RTU), manual V1.02.",
 "summary": "The SDM630-DI is a three-phase, direct-connected (up to 100 A) DIN-rail energy meter with two digital inputs and an RS485 Modbus RTU port. Live readings and energy totals are IEEE-754 floats in input registers (function 04); configuration is held as floats in holding registers (function 03 read, 16 write). This map covers per-phase and total electrical values, demand, THD, import/export energy per phase, and the RS485/demand/system settings.",
 "transport": [
  "RTU"
 ],
 "defaults": {
  "unit_id": 1,
  "baud": 9600,
  "parity": "None",
  "data_bits": 8,
  "stop_bits": 1,
  "tcp_port": null
 },
 "addressing": {
  "convention": "Modicon",
  "note": "Registers are printed Modicon style (30001 / 40001, and six-digit 3xxxxx / 4xxxxx for high addresses) next to the hex start address actually sent. Wire address = printed number minus 30001 or 40001 (or 300001 / 400001); e.g. 30001 is 0x0000 and 461457 is 0xF010."
 },
 "default_word_order": "ABCD",
 "firmware": null,
 "source": {
  "title": "SDM630-DI User Manual",
  "doc_number": "V1.02 (cover reads 2025 V1.01)",
  "revision_date": "2025-08-04",
  "url": "https://www.eastrongroup.com/eastrongroup/2025/08/06/eastronsdm630-diusermanualv1.02.pdf",
  "pages": "Chapter 4, pp. 19-27 (PDF pages 22-30)"
 },
 "notes": [
  "Word order: the manual states that Eastron sends floats big-endian with the first register holding the high 16 bits, and its worked example returns 42 70 00 00 for 60.0. All floats here are ABCD.",
  "The register table marks each input value as available or not for each wiring system (3P4W, 3P3W, 1P2W); the per-register descriptions repeat this where a value is not available on every system.",
  "Left out: the Int32 (0.1 V, 0.001 A, 0.1 W ...) and Int64 (Wh, VArh) mirror blocks from 310021 onwards. The manual states big-endian order only for floats, not for these integer types, so their word order is not confirmed by the document.",
  "Left out: 30255 'Total system power factor' because the table gives its unit as Degrees, which conflicts with 30063 (total power factor) and is likely an error in the source.",
  "Left out: DI-1/DI-2 counters (40770/40772) and the serial number (464513), which are unsigned 32-bit integers with no stated word order; and the CO2 rate setting (40071), whose 'hex' data format is not defined.",
  "The int64 CO2 at 310311 is omitted for the same reason; the float CO2 at 310315 is kept.",
  "Left out: DI filter time (40769). The register table gives its range in milliseconds while the setup-menu section gives the same 0-255 range in minutes, so the unit is ambiguous.",
  "Demand footnote: the manual says the power-sum demand is calculated for 'import – export' (en dash) without saying whether that means net import minus export or both directions combined; check on a live meter if the sign matters."
 ],
 "registers": [
  {
   "table": "input_register",
   "address": 0,
   "documented": "30001",
   "name": "L1 voltage (L-N)",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 2,
   "documented": "30003",
   "name": "L2 voltage (L-N)",
   "description": "Not provided on 1P2W or 3P3W wiring.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 4,
   "documented": "30005",
   "name": "L3 voltage (L-N)",
   "description": "Not provided on 1P2W or 3P3W wiring.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 6,
   "documented": "30007",
   "name": "L1 current",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 8,
   "documented": "30009",
   "name": "L2 current",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 10,
   "documented": "30011",
   "name": "L3 current",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 12,
   "documented": "30013",
   "name": "L1 active power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "W",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 14,
   "documented": "30015",
   "name": "L2 active power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "W",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 16,
   "documented": "30017",
   "name": "L3 active power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "W",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 18,
   "documented": "30019",
   "name": "L1 apparent power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VA",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 20,
   "documented": "30021",
   "name": "L2 apparent power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VA",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 22,
   "documented": "30023",
   "name": "L3 apparent power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VA",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 24,
   "documented": "30025",
   "name": "L1 reactive power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VAr",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 26,
   "documented": "30027",
   "name": "L2 reactive power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VAr",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 28,
   "documented": "30029",
   "name": "L3 reactive power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VAr",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 30,
   "documented": "30031",
   "name": "L1 power factor",
   "description": "Sign follows current direction: negative means reverse flow.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 32,
   "documented": "30033",
   "name": "L2 power factor",
   "description": "Sign follows current direction: negative means reverse flow.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 34,
   "documented": "30035",
   "name": "L3 power factor",
   "description": "Sign follows current direction: negative means reverse flow.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 36,
   "documented": "30037",
   "name": "L1 phase angle",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "Degrees",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 38,
   "documented": "30039",
   "name": "L2 phase angle",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "Degrees",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 40,
   "documented": "30041",
   "name": "L3 phase angle",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "Degrees",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 42,
   "documented": "30043",
   "name": "Average L-N voltage",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 46,
   "documented": "30047",
   "name": "Average line current",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 48,
   "documented": "30049",
   "name": "Sum of line currents",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 52,
   "documented": "30053",
   "name": "Total active power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "W",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 56,
   "documented": "30057",
   "name": "Total apparent power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VA",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 60,
   "documented": "30061",
   "name": "Total reactive power",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VAr",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 62,
   "documented": "30063",
   "name": "Total power factor",
   "description": "Sign follows current direction: negative means reverse flow.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 66,
   "documented": "30067",
   "name": "Total system phase angle",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "Degrees",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 70,
   "documented": "30071",
   "name": "Frequency",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "Hz",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 72,
   "documented": "30073",
   "name": "Import active energy",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 74,
   "documented": "30075",
   "name": "Export active energy",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 76,
   "documented": "30077",
   "name": "Import reactive energy",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 78,
   "documented": "30079",
   "name": "Export reactive energy",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 80,
   "documented": "30081",
   "name": "Apparent energy",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVAh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 82,
   "documented": "30083",
   "name": "Ah",
   "description": "Accumulated ampere-hours.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "Ah",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 84,
   "documented": "30085",
   "name": "Total active power demand",
   "description": "Footnoted as 'import – export' in the manual; see notes.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "W",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 86,
   "documented": "30087",
   "name": "Max total active power demand",
   "description": "Footnoted as 'import – export' in the manual; see notes.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "W",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 100,
   "documented": "30101",
   "name": "Apparent power demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VA",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 102,
   "documented": "30103",
   "name": "Apparent power max demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VA",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 104,
   "documented": "30105",
   "name": "Neutral current demand",
   "description": "3P4W only.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 106,
   "documented": "30107",
   "name": "Max neutral current demand",
   "description": "3P4W only.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 108,
   "documented": "30109",
   "name": "Reactive power demand",
   "description": "Footnoted as 'import – export' in the manual; see notes.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VAr",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 110,
   "documented": "30111",
   "name": "Reactive power max demand",
   "description": "Footnoted as 'import – export' in the manual; see notes.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "VAr",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 200,
   "documented": "30201",
   "name": "L1-L2 voltage",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 202,
   "documented": "30203",
   "name": "L2-L3 voltage",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 204,
   "documented": "30205",
   "name": "L3-L1 voltage",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 206,
   "documented": "30207",
   "name": "Average L-L voltage",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "V",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 224,
   "documented": "30225",
   "name": "Neutral current",
   "description": "3P4W only.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 234,
   "documented": "30235",
   "name": "L1 voltage THD (L-N)",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 236,
   "documented": "30237",
   "name": "L2 voltage THD (L-N)",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 238,
   "documented": "30239",
   "name": "L3 voltage THD (L-N)",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 240,
   "documented": "30241",
   "name": "L1 current THD",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 242,
   "documented": "30243",
   "name": "L2 current THD",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 244,
   "documented": "30245",
   "name": "L3 current THD",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 248,
   "documented": "30249",
   "name": "Average L-N voltage THD",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 250,
   "documented": "30251",
   "name": "Average line current THD",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 258,
   "documented": "30259",
   "name": "L1 current demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 260,
   "documented": "30261",
   "name": "L2 current demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 262,
   "documented": "30263",
   "name": "L3 current demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 264,
   "documented": "30265",
   "name": "Max L1 current demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 266,
   "documented": "30267",
   "name": "Max L2 current demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 268,
   "documented": "30269",
   "name": "Max L3 current demand",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "A",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 334,
   "documented": "30335",
   "name": "L1-L2 voltage THD",
   "description": "3P3W only.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 336,
   "documented": "30337",
   "name": "L2-L3 voltage THD",
   "description": "3P3W only.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 338,
   "documented": "30339",
   "name": "L3-L1 voltage THD",
   "description": "3P3W only.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 340,
   "documented": "30341",
   "name": "Average L-L voltage THD",
   "description": "3P3W only.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "%",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 342,
   "documented": "30343",
   "name": "Total kWh",
   "description": "Import plus export active energy.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 344,
   "documented": "30345",
   "name": "Total kVArh",
   "description": "Import plus export reactive energy.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 346,
   "documented": "30347",
   "name": "L1 import kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 348,
   "documented": "30349",
   "name": "L2 import kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 350,
   "documented": "30351",
   "name": "L3 import kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 352,
   "documented": "30353",
   "name": "L1 export kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 354,
   "documented": "30355",
   "name": "L2 export kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 356,
   "documented": "30357",
   "name": "L3 export kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 358,
   "documented": "30359",
   "name": "L1 total kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 360,
   "documented": "30361",
   "name": "L2 total kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 362,
   "documented": "30363",
   "name": "L3 total kWh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kWh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 364,
   "documented": "30365",
   "name": "L1 import kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 366,
   "documented": "30367",
   "name": "L2 import kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 368,
   "documented": "30369",
   "name": "L3 import kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 370,
   "documented": "30371",
   "name": "L1 export kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 372,
   "documented": "30373",
   "name": "L2 export kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 374,
   "documented": "30375",
   "name": "L3 export kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 376,
   "documented": "30377",
   "name": "L1 total kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 378,
   "documented": "30379",
   "name": "L2 total kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 380,
   "documented": "30381",
   "name": "L3 total kVArh",
   "description": "",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "kVArh",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "input_register",
   "address": 10314,
   "documented": "310315",
   "name": "CO2",
   "description": "Accumulated CO2 emissions figure.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "Kg",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 0,
   "documented": "40001",
   "name": "Demand time",
   "description": "Elapsed minutes of the first demand interval; demand readings are valid after one full period.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "min",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 2,
   "documented": "40003",
   "name": "Demand period",
   "description": "0 to 60 minutes; 0 updates demand every second. Default 60.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "min",
   "access": "RW",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 10,
   "documented": "40011",
   "name": "System type",
   "description": "Wiring system. Default 3P4W.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "1": "1P2W",
    "2": "3P3W",
    "3": "3P4W"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 14,
   "documented": "40015",
   "name": "Key parameter programming authorization (KPPA)",
   "description": "Read 0/1 authorization state; write the password to unlock key settings.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "Not authorized",
    "1": "Authorized"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 18,
   "documented": "40019",
   "name": "Parity / stop bits",
   "description": "RS485 framing. Default one stop bit, no parity.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "1 stop bit, no parity",
    "1": "1 stop bit, even parity",
    "2": "1 stop bit, odd parity",
    "3": "2 stop bits, no parity"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 20,
   "documented": "40021",
   "name": "Modbus address",
   "description": "Node address 1 to 247. Default 1.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 24,
   "documented": "40025",
   "name": "Password",
   "description": "Range 0000 to 9999. Default 1000.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 28,
   "documented": "40029",
   "name": "Baud rate",
   "description": "Default 9600.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "",
   "access": "RW",
   "values": {
    "0": "2400",
    "1": "4800",
    "2": "9600",
    "3": "19200",
    "4": "38400",
    "6": "115200"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 60,
   "documented": "40061",
   "name": "Backlight time",
   "description": "0 to 121; 0 keeps backlight on, 121 keeps it off. Default 60.",
   "data_type": "FLOAT32",
   "length": 2,
   "word_order": "ABCD",
   "scale": 1,
   "units": "min",
   "access": "RW",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 61456,
   "documented": "461457",
   "name": "Reset",
   "description": "Write a code to clear stored values.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "W",
   "values": {
    "0": "Reset maximum demand",
    "6": "Reset DI counts"
   },
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 64514,
   "documented": "464515",
   "name": "Meter code",
   "description": "Model identification code (hex).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 64644,
   "documented": "464645",
   "name": "Software version",
   "description": "High byte and low byte form version XX.YY.",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  },
  {
   "table": "holding_register",
   "address": 64646,
   "documented": "464647",
   "name": "Program number",
   "description": "Firmware program identifier (hex).",
   "data_type": "UINT16",
   "length": 1,
   "word_order": null,
   "scale": 1,
   "units": "",
   "access": "R",
   "values": null,
   "bits": null,
   "offset": 0
  }
 ],
 "integration": {
  "summary": "Read floats with function 04 starting at 0x0000 (two registers per value, high word first). Total power is at 0x0034, import/export kWh at 0x0048/0x004A. Settings are floats in holding registers and need the password written to the KPPA register first for key parameters.",
  "minimum_registers": [
   {
    "table": "input_register",
    "address": 0,
    "why": "L1 voltage"
   },
   {
    "table": "input_register",
    "address": 6,
    "why": "L1 current"
   },
   {
    "table": "input_register",
    "address": 52,
    "why": "Total active power"
   },
   {
    "table": "input_register",
    "address": 62,
    "why": "Total power factor"
   },
   {
    "table": "input_register",
    "address": 70,
    "why": "Frequency"
   },
   {
    "table": "input_register",
    "address": 72,
    "why": "Import kWh"
   },
   {
    "table": "input_register",
    "address": 74,
    "why": "Export kWh"
   }
  ],
  "enable": "Modbus RTU is always active on the RS485 terminals. To change key settings over Modbus, first write the meter password (default 1000) as a float to 40015 (KPPA); reading 40015 returns 1 when authorized.",
  "watchdog": null,
  "quirks": [
   "Every setting, including enumerations like baud rate, is a 32-bit float spanning two registers; write both registers with function 16.",
   "Some holding registers use six-digit Modicon numbers (461457, 464515...) that map to hex 0xF010, 0xFC02 and so on.",
   "Power factor carries a sign for current direction: positive for forward current, negative for reverse."
  ],
  "setup": [
   "Default RS485 settings: address 1, 9600 bps, 8 data bits, no parity, 1 stop bit.",
   "Address, baud, parity and stop bits can be set from the front-panel setup menu or the holding registers listed here.",
   "Set the system type (1P2W / 3P3W / 3P4W) to match the wiring; the table shows which values each system provides."
  ],
  "gotchas": [
   "The Int32 and Int64 copies of the readings (310021 onwards) are not mapped because their word order is not documented; use the float registers.",
   "Max demand and DI counters are cleared with the Reset register (0xF010) codes 0 and 6."
  ]
 },
 "page": "https://easymodbus.com/modbus-register-maps/eastron/sdm630-di",
 "address_note": "address = 0-based Modbus wire (PDU) address; documented = as printed in the source.",
 "note": "Re-typed from the manufacturer's public documentation (see source) and verified against it. Registers vary by firmware and options; verify against the live device before writing."
}