{
  "$schema": "https://raw.githubusercontent.com/nobrega8/mbmap-library/main/schema/mbmap-2.schema.json",
  "mbmap": 2,
  "vendor": "Siemens",
  "model": "SINAMICS G120 (CU240B-2 / CU240E-2)",
  "models": [
    "SINAMICS G120",
    "G120",
    "CU240B-2",
    "CU240E-2"
  ],
  "vendor_website": "siemens.com",
  "description": "SINAMICS G120 inverter with CU240B-2 or CU240E-2 Control Unit (RS485, Modbus RTU): process data, I/O, converter data, diagnostics, faults and technology controller registers",
  "revision": 1,
  "revised": "2026-11-10",
  "source": "Siemens, \"SINAMICS G120 Inverter with CU240B-2 and CU240E-2 Control Units Operating Instructions\", 01/2011, FW 4.4, A5E02299792B AB, section 6.2.3 Communication over Modbus RTU, table 6-30; https://pogoni.etf.bg.ac.rs/PLC_PLUS/Control_Units_CU240B-2_and_CU240E-2_en-US.pdf",
  "sources": [
    {
      "title": "SINAMICS G120 Inverter with CU240B-2 and CU240E-2 Control Units, Operating Instructions",
      "version": "A5E02299792B AB, FW 4.4",
      "date": "2011-01",
      "url": "https://pogoni.etf.bg.ac.rs/PLC_PLUS/Control_Units_CU240B-2_and_CU240E-2_en-US.pdf",
      "note": "section 6.2.3, Table 6-30 Assigning the Modbus register to the parameters of the Control Unit (copy of the Siemens manual hosted by a university; the Siemens support site refused automated download)"
    }
  ],
  "notes": [
    "Set p2030 = 2 (fieldbus protocol Modbus) with the macro P0015 = 21; the address comes from the DIP switches or p2021 (1 to 247, effective after a power cycle), the baud rate from p2020 (factory 19200 bit/s). The Control Unit is a Modbus RTU slave with even parity.",
    "Addresses are the manual's register numbers minus 40001 (40100 is address 99). Only function codes 3 (read) and 6 (write single register) are used; reading more than 125 registers or crossing the edge of a register block returns an exception.",
    "Valid holding registers run from 40001 to 40522. The manual says 40001-40065 are compatible with the Micromaster MM436 but does not list them, so only 40100 onward is mapped.",
    "The process data registers 40100, 40101, 40110 and 40111 are monitored by p2040 (factory 100 ms): the drive raises alarm F1910 (setpoint timeout) if they are not accessed within that time. The p2000 reference speed scales the setpoint and actual value words (0x4000 = 100 %).",
    "Written from the manual of the CU240B-2/CU240E-2 for firmware 4.4. The CU230P-2 and later firmware use the same Modbus RTU interface, but their manuals were not checked, so the map may differ from them.",
    "The manual lists no register with a fixed value, so the map has no reference values.",
    "Written from the manufacturer's manual; not tested on a device."
  ],
  "protocol": "rtu",
  "unit_id": 1,
  "baudrate": 19200,
  "databits": 8,
  "parity": "E",
  "stopbits": 1,
  "byte_order": "big",
  "word_order": "big",
  "address_base": 0,
  "x_status": "official",
  "registers": [
    {
      "name": "Control word (STW)",
      "group": "Process data",
      "area": "holding",
      "address": 99,
      "type": "uint16",
      "access": "RW",
      "description": "Process data 1: control word 1 (STW1). Start = 0x047F, OFF1 = 0x047E."
    },
    {
      "name": "Main setpoint (HSW)",
      "group": "Process data",
      "area": "holding",
      "address": 100,
      "type": "uint16",
      "access": "RW",
      "description": "Process data 2: main setpoint, 0x4000 (16384) = 100 % of the reference speed (p2000)."
    },
    {
      "name": "Status word (ZSW)",
      "group": "Process data",
      "area": "holding",
      "address": 109,
      "type": "uint16",
      "access": "R",
      "description": "Process data 1: status word 1 (ZSW1)."
    },
    {
      "name": "Main actual value (HIW)",
      "group": "Process data",
      "area": "holding",
      "address": 110,
      "type": "uint16",
      "access": "R",
      "description": "Process data 2: main actual value, 0x4000 (16384) = 100 % of the reference speed (p2000)."
    },
    {
      "name": "Digital output 0",
      "group": "I/O",
      "area": "holding",
      "address": 199,
      "type": "uint16",
      "access": "RW",
      "description": "p0730, r0747.0. HIGH = 1, LOW = 0."
    },
    {
      "name": "Digital output 1",
      "group": "I/O",
      "area": "holding",
      "address": 200,
      "type": "uint16",
      "access": "RW",
      "description": "p0731, r0747.1. HIGH = 1, LOW = 0."
    },
    {
      "name": "Digital output 2",
      "group": "I/O",
      "area": "holding",
      "address": 201,
      "type": "uint16",
      "access": "RW",
      "description": "p0732, r0747.2. HIGH = 1, LOW = 0."
    },
    {
      "name": "Analog output 0",
      "group": "I/O",
      "area": "holding",
      "address": 219,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r0774.0."
    },
    {
      "name": "Analog output 1",
      "group": "I/O",
      "area": "holding",
      "address": 220,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r0774.1."
    },
    {
      "name": "Digital input 0",
      "group": "I/O",
      "area": "holding",
      "address": 239,
      "type": "uint16",
      "access": "R",
      "description": "r0722.0. HIGH = 1, LOW = 0."
    },
    {
      "name": "Digital input 1",
      "group": "I/O",
      "area": "holding",
      "address": 240,
      "type": "uint16",
      "access": "R",
      "description": "r0722.1. HIGH = 1, LOW = 0."
    },
    {
      "name": "Digital input 2",
      "group": "I/O",
      "area": "holding",
      "address": 241,
      "type": "uint16",
      "access": "R",
      "description": "r0722.2. HIGH = 1, LOW = 0."
    },
    {
      "name": "Digital input 3",
      "group": "I/O",
      "area": "holding",
      "address": 242,
      "type": "uint16",
      "access": "R",
      "description": "r0722.3. HIGH = 1, LOW = 0."
    },
    {
      "name": "Digital input 4",
      "group": "I/O",
      "area": "holding",
      "address": 243,
      "type": "uint16",
      "access": "R",
      "description": "r0722.4. HIGH = 1, LOW = 0."
    },
    {
      "name": "Digital input 5",
      "group": "I/O",
      "area": "holding",
      "address": 244,
      "type": "uint16",
      "access": "R",
      "description": "r0722.5. HIGH = 1, LOW = 0."
    },
    {
      "name": "Analog input 0",
      "group": "I/O",
      "area": "holding",
      "address": 259,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r0755[0]."
    },
    {
      "name": "Analog input 1",
      "group": "I/O",
      "area": "holding",
      "address": 260,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r0755[1]."
    },
    {
      "name": "Analog input 2",
      "group": "I/O",
      "area": "holding",
      "address": 261,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r0755[2]."
    },
    {
      "name": "Analog input 3",
      "group": "I/O",
      "area": "holding",
      "address": 262,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r0755[3]."
    },
    {
      "name": "Power unit number",
      "group": "Identity",
      "area": "holding",
      "address": 299,
      "type": "uint16",
      "access": "R",
      "description": "r0200 (power unit code number)."
    },
    {
      "name": "Converter firmware version",
      "group": "Identity",
      "area": "holding",
      "address": 300,
      "type": "uint16",
      "scale": 0.01,
      "access": "R",
      "description": "r0018. The manual gives the scaling factor as 0.0001 but the range as 0.00 to 327.67; the factor 100 of the V20 table is used here."
    },
    {
      "name": "Rated power of the power unit",
      "group": "Identity",
      "area": "holding",
      "address": 319,
      "type": "uint16",
      "scale": 0.01,
      "unit": "kW",
      "access": "R",
      "description": "r0206."
    },
    {
      "name": "Current limit",
      "group": "Drive settings",
      "area": "holding",
      "address": 320,
      "type": "uint16",
      "scale": 0.1,
      "unit": "%",
      "access": "RW",
      "description": "p0640."
    },
    {
      "name": "Ramp-up time",
      "group": "Drive settings",
      "area": "holding",
      "address": 321,
      "type": "uint16",
      "scale": 0.01,
      "unit": "s",
      "access": "RW",
      "description": "p1120."
    },
    {
      "name": "Ramp-down time",
      "group": "Drive settings",
      "area": "holding",
      "address": 322,
      "type": "uint16",
      "scale": 0.01,
      "unit": "s",
      "access": "RW",
      "description": "p1121."
    },
    {
      "name": "Reference speed",
      "group": "Drive settings",
      "area": "holding",
      "address": 323,
      "type": "uint16",
      "unit": "RPM",
      "access": "RW",
      "description": "p2000."
    },
    {
      "name": "Speed setpoint",
      "group": "Diagnostics",
      "area": "holding",
      "address": 339,
      "type": "int16",
      "unit": "RPM",
      "access": "R",
      "description": "r0020."
    },
    {
      "name": "Speed actual value",
      "group": "Diagnostics",
      "area": "holding",
      "address": 340,
      "type": "int16",
      "unit": "RPM",
      "access": "R",
      "description": "r0022."
    },
    {
      "name": "Output frequency",
      "group": "Diagnostics",
      "area": "holding",
      "address": 341,
      "type": "int16",
      "scale": 0.01,
      "unit": "Hz",
      "access": "R",
      "description": "r0024."
    },
    {
      "name": "Output voltage",
      "group": "Diagnostics",
      "area": "holding",
      "address": 342,
      "type": "uint16",
      "unit": "V",
      "access": "R",
      "description": "r0025."
    },
    {
      "name": "DC link voltage",
      "group": "Diagnostics",
      "area": "holding",
      "address": 343,
      "type": "uint16",
      "unit": "V",
      "access": "R",
      "description": "r0026."
    },
    {
      "name": "Actual value of current",
      "group": "Diagnostics",
      "area": "holding",
      "address": 344,
      "type": "uint16",
      "scale": 0.01,
      "unit": "A",
      "access": "R",
      "description": "r0027."
    },
    {
      "name": "Actual torque value",
      "group": "Diagnostics",
      "area": "holding",
      "address": 345,
      "type": "int16",
      "scale": 0.01,
      "unit": "Nm",
      "access": "R",
      "description": "r0031."
    },
    {
      "name": "Actual active power",
      "group": "Diagnostics",
      "area": "holding",
      "address": 346,
      "type": "uint16",
      "scale": 0.01,
      "unit": "kW",
      "access": "R",
      "description": "r0032."
    },
    {
      "name": "Energy consumption",
      "group": "Diagnostics",
      "area": "holding",
      "address": 347,
      "type": "uint16",
      "unit": "kWh",
      "access": "R",
      "description": "r0039."
    },
    {
      "name": "Control priority",
      "group": "Status",
      "area": "holding",
      "address": 348,
      "type": "uint16",
      "access": "R",
      "description": "r0807: HAND / AUTO."
    },
    {
      "name": "Fault number 0",
      "group": "Faults",
      "area": "holding",
      "address": 399,
      "type": "uint16",
      "access": "R",
      "description": "r0947[0]."
    },
    {
      "name": "Fault number 1",
      "group": "Faults",
      "area": "holding",
      "address": 400,
      "type": "uint16",
      "access": "R",
      "description": "r0947[1]."
    },
    {
      "name": "Fault number 2",
      "group": "Faults",
      "area": "holding",
      "address": 401,
      "type": "uint16",
      "access": "R",
      "description": "r0947[2]."
    },
    {
      "name": "Fault number 3",
      "group": "Faults",
      "area": "holding",
      "address": 402,
      "type": "uint16",
      "access": "R",
      "description": "r0947[3]."
    },
    {
      "name": "Fault number 4",
      "group": "Faults",
      "area": "holding",
      "address": 403,
      "type": "uint16",
      "access": "R",
      "description": "r0947[4]."
    },
    {
      "name": "Fault number 5",
      "group": "Faults",
      "area": "holding",
      "address": 404,
      "type": "uint16",
      "access": "R",
      "description": "r0947[5]."
    },
    {
      "name": "Fault number 6",
      "group": "Faults",
      "area": "holding",
      "address": 405,
      "type": "uint16",
      "access": "R",
      "description": "r0947[6]."
    },
    {
      "name": "Fault number 7",
      "group": "Faults",
      "area": "holding",
      "address": 406,
      "type": "uint16",
      "access": "R",
      "description": "r0947[7]."
    },
    {
      "name": "Alarm number",
      "group": "Faults",
      "area": "holding",
      "address": 407,
      "type": "uint16",
      "access": "R",
      "description": "r2110[0]."
    },
    {
      "name": "Parameter error code",
      "group": "Parameter access",
      "area": "holding",
      "address": 498,
      "type": "uint16",
      "access": "R"
    },
    {
      "name": "Technology controller enable",
      "group": "PID",
      "area": "holding",
      "address": 499,
      "type": "uint16",
      "access": "RW",
      "description": "p2200, r2349.0."
    },
    {
      "name": "Technology controller setpoint (MOP)",
      "group": "PID",
      "area": "holding",
      "address": 500,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "RW",
      "description": "p2240."
    },
    {
      "name": "Technology controller actual value filter time constant",
      "group": "PID",
      "area": "holding",
      "address": 509,
      "type": "uint16",
      "scale": 0.01,
      "access": "RW",
      "description": "p2265."
    },
    {
      "name": "Technology controller actual value scaling",
      "group": "PID",
      "area": "holding",
      "address": 510,
      "type": "uint16",
      "scale": 0.01,
      "unit": "%",
      "access": "RW",
      "description": "p2269."
    },
    {
      "name": "Technology controller proportional gain",
      "group": "PID",
      "area": "holding",
      "address": 511,
      "type": "uint16",
      "scale": 0.001,
      "access": "RW",
      "description": "p2280."
    },
    {
      "name": "Technology controller integral time",
      "group": "PID",
      "area": "holding",
      "address": 512,
      "type": "uint16",
      "unit": "s",
      "access": "RW",
      "description": "p2285."
    },
    {
      "name": "Technology controller D time constant",
      "group": "PID",
      "area": "holding",
      "address": 513,
      "type": "uint16",
      "access": "RW",
      "description": "p2274."
    },
    {
      "name": "Technology controller upper limit",
      "group": "PID",
      "area": "holding",
      "address": 514,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "RW",
      "description": "p2291."
    },
    {
      "name": "Technology controller lower limit",
      "group": "PID",
      "area": "holding",
      "address": 515,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "RW",
      "description": "p2292."
    },
    {
      "name": "Technology controller setpoint after ramp",
      "group": "PID",
      "area": "holding",
      "address": 519,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r2250."
    },
    {
      "name": "Technology controller actual value after filter",
      "group": "PID",
      "area": "holding",
      "address": 520,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r2266."
    },
    {
      "name": "Technology controller output",
      "group": "PID",
      "area": "holding",
      "address": 521,
      "type": "int16",
      "scale": 0.01,
      "unit": "%",
      "access": "R",
      "description": "r2294."
    }
  ]
}