{
  "$schema": "https://raw.githubusercontent.com/nobrega8/mbmap-library/main/schema/mbmap-2.schema.json",
  "mbmap": 2,
  "vendor": "Novus",
  "model": "DigiRail-VA",
  "models": ["DigiRail-VA"],
  "vendor_website": "novus.com.br",
  "description": "Single-phase AC voltage and current transducer (0-300 V, 0-5 A, True RMS) with 4-20 mA / 0-10 V outputs and Modbus RTU over RS485 or USB: voltage, current, powers, power factor and frequency",
  "revision": 1,
  "revised": "2026-10-31",
  "source": "Novus DigiRail-VA manual (Portuguese)",
  "sources": [
    {"title": "DigiRail-VA - Manual de Operação", "url": "https://github.com/user-attachments/files/34218847/Manual_DigiRail-VA_PT.pdf", "note": "linked in issue #87; chapter 8 (Modbus commands and register table)"}
  ],
  "notes": [
    "Every value is a holding register. Functions 03, 06 and 16.",
    "Measurements are given twice: as IEEE 754 floats (registers 0-17, high word first) and as scaled integers (registers 20-28). The peak voltage and peak current are only in the integer block.",
    "The manual does not give the RS485 factory settings. The connection defaults in this map are the ones it gives for the USB interface (virtual serial port): 115200 bit/s, no parity, 2 stop bits, address 255. Set the RS485 address, baud rate, parity and stop bits with DigiConfig.",
    "Reactive power is given as a magnitude; register 31 says whether it is inductive or capacitive.",
    "The manufacturer says the device is not meant for energy billing.",
    "Written from the manufacturer's manual; not tested on a device."
  ],
  "protocol": "rtu",
  "unit_id": 255,
  "baudrate": 115200,
  "databits": 8,
  "parity": "N",
  "stopbits": 2,
  "byte_order": "big",
  "word_order": "big",
  "address_base": 0,
  "x_status": "official",
  "registers": [
    {"name": "Voltage", "group": "Measurements", "area": "holding", "address": 0, "type": "float32", "unit": "V", "access": "R", "description": "RMS"},
    {"name": "Current", "group": "Measurements", "area": "holding", "address": 2, "type": "float32", "unit": "A", "access": "R", "description": "RMS"},
    {"name": "Active power", "group": "Measurements", "area": "holding", "address": 8, "type": "float32", "unit": "W", "access": "R"},
    {"name": "Apparent power", "group": "Measurements", "area": "holding", "address": 10, "type": "float32", "unit": "VA", "access": "R"},
    {"name": "Reactive power", "group": "Measurements", "area": "holding", "address": 12, "type": "float32", "unit": "var", "access": "R", "description": "Magnitude; see Reactive power sign"},
    {"name": "Power factor", "group": "Measurements", "area": "holding", "address": 14, "type": "float32", "access": "R"},
    {"name": "Frequency", "group": "Measurements", "area": "holding", "address": 16, "type": "float32", "unit": "Hz", "access": "R"},
    {"name": "Reactive power sign", "group": "Measurements", "area": "holding", "address": 31, "type": "uint16", "access": "R", "enum": {"0": "Inductive", "1": "Capacitive"}},

    {"name": "Voltage (integer)", "group": "Integer values", "area": "holding", "address": 20, "type": "uint16", "scale": 0.1, "unit": "V", "access": "R"},
    {"name": "Current (integer)", "group": "Integer values", "area": "holding", "address": 21, "type": "uint16", "scale": 0.01, "unit": "A", "access": "R"},
    {"name": "Peak voltage", "group": "Integer values", "area": "holding", "address": 22, "type": "uint16", "scale": 0.1, "unit": "V", "access": "R", "description": "Highest peak voltage"},
    {"name": "Peak current", "group": "Integer values", "area": "holding", "address": 23, "type": "uint16", "scale": 0.01, "unit": "A", "access": "R", "description": "Highest peak current"},
    {"name": "Active power (integer)", "group": "Integer values", "area": "holding", "address": 24, "type": "uint16", "scale": 0.1, "unit": "W", "access": "R"},
    {"name": "Apparent power (integer)", "group": "Integer values", "area": "holding", "address": 25, "type": "uint16", "scale": 0.1, "unit": "VA", "access": "R"},
    {"name": "Reactive power (integer)", "group": "Integer values", "area": "holding", "address": 26, "type": "uint16", "scale": 0.1, "unit": "var", "access": "R"},
    {"name": "Power factor (integer)", "group": "Integer values", "area": "holding", "address": 27, "type": "int16", "scale": 0.001, "access": "R"},
    {"name": "Frequency (integer)", "group": "Integer values", "area": "holding", "address": 28, "type": "uint16", "scale": 0.1, "unit": "Hz", "access": "R"},

    {"name": "Serial number", "group": "Identity", "area": "holding", "address": 200, "type": "uint32", "access": "R", "role": "serial"},
    {"name": "Firmware version", "group": "Identity", "area": "holding", "address": 202, "type": "uint16", "scale": 0.01, "access": "R", "role": "firmware", "description": "204 is version 2.04"}
  ]
}