MBMap Registry
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  2. Carlo Gavazzi
  3. EM24 Ethernet

Carlo Gavazzi EM24 Ethernet Modbus register map

Also covers EM24DINAV23XE1X, EM24DINAV23XE1PFA, EM24DINAV23XE1PFB, EM24DINAV53XE1X, EM24DINAV53XE1PFA, EM24DINAV53XE1PFB

Three-phase energy analyzer, Modbus TCP version (EM24-DIN E1)

  • Official
  • 75 registers
  • Modbus TCP
  • Revision 1 · 2026-10-14
  • Identity: model, firmware, serial number

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

Download .mbmap.json Raw JSON View on GitHub Suggest a correction Report a problem

Communication

Protocol
Modbus TCP
Unit ID
1default
TCP port
502
Byte / word order
CDAB · bytes big-endian, words low first (word swap)
Addresses
0-based

Connection values are defaults: the device may be configured differently.

Map

Registers
14 holding registers, 61 input registers
Groups
9
Revision
1 · 2026-10-14
Added
()
File
maps/carlo-gavazzi/em24-ethernet.mbmap.json · 13 KB · history
SHA-256
1b671b37ac3f79e4da1834e5ccef558062f48df3a06988cf9bfc4768329f6a66
Manufacturer
gavazziautomation.com

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Registers
RoleRegisterAddressTypeValues
Model Carlo Gavazzi identification code input 11 uint16 0x0670 = EM24DINAV23XE1X, 0x0671 = EM24DINAV23XE1PFA, 0x0672 = EM24DINAV23XE1PFB, +3 more
Firmware Measurement firmware major input 770 uint16 bits 12–15
Firmware Measurement firmware minor input 770 uint16 bits 8–11
Firmware Measurement firmware revision input 770 uint16 bits 0–7
Serial number Serial number input 20480 string[7]

Sources and notes

Source: Carlo Gavazzi EM24_E1 (Ethernet) communication protocol, version 0 revision 1.3

  • Measurements can be read with FC04 (input) or FC03 (holding): both return the same values.
  • 32-bit values are sent low word first.
  • The same measurements are also available grouped by phase from 0x00FE to 0x017E; this map uses the table grouped by variable type.
  • The RS-485 EM24-DIN models use a different protocol document and are not covered here.
AreaAddressNameTypeAccessUnitScaleDescription
IR 0 int32 CDAB R V ×0.1
IR 2 int32 CDAB R V ×0.1
IR 4 int32 CDAB R V ×0.1
IR 6 int32 CDAB R V ×0.1
IR 8 int32 CDAB R V ×0.1
IR 10 int32 CDAB R V ×0.1
IR 12 int32 CDAB R A ×0.001
IR 14 int32 CDAB R A ×0.001
IR 16 int32 CDAB R A ×0.001
IR 18 int32 CDAB R W ×0.1
IR 20 int32 CDAB R W ×0.1
IR 22 int32 CDAB R W ×0.1
IR 24 int32 CDAB R VA ×0.1
IR 26 int32 CDAB R VA ×0.1
IR 28 int32 CDAB R VA ×0.1
IR 30 int32 CDAB R var ×0.1
IR 32 int32 CDAB R var ×0.1
IR 34 int32 CDAB R var ×0.1
IR 36 int32 CDAB R V ×0.1
IR 38 int32 CDAB R V ×0.1
IR 40 int32 CDAB R W ×0.1
IR 42 int32 CDAB R VA ×0.1
IR 44 int32 CDAB R var ×0.1
IR 46 int16 R ×0.001 Negative = leading (capacitive), positive = lagging (inductive)
IR 47 int16 R ×0.001 Negative = leading (capacitive), positive = lagging (inductive)
IR 48 int16 R ×0.001 Negative = leading (capacitive), positive = lagging (inductive)
IR 49 int16 R ×0.001 Negative = leading (capacitive), positive = lagging (inductive)
IR 50 int16 R Meaningful on three-phase systems only
IR 51 uint16 R Hz ×0.1
IR 52 int32 CDAB R kWh ×0.1
IR 54 int32 CDAB R kvarh ×0.1
IR 56 int32 CDAB R W ×0.1
IR 58 int32 CDAB R W ×0.1
IR 60 int32 CDAB R kWh ×0.1 Partial counter
IR 62 int32 CDAB R kvarh ×0.1 Partial counter
IR 64 int32 CDAB R kWh ×0.1
IR 66 int32 CDAB R kWh ×0.1
IR 68 int32 CDAB R kWh ×0.1
IR 70 int32 CDAB R kWh ×0.1 Tariff 1
IR 72 int32 CDAB R kWh ×0.1 Tariff 2
IR 74 int32 CDAB R kWh ×0.1 Tariff 3
IR 76 int32 CDAB R kWh ×0.1 Tariff 4
IR 78 int32 CDAB R kWh ×0.1
IR 80 int32 CDAB R kvarh ×0.1
IR 90 int32 CDAB R h ×0.01
IR 110 int32 CDAB R kvarh ×0.1 Tariff 1
IR 112 int32 CDAB R kvarh ×0.1 Tariff 2
IR 114 int32 CDAB R kvarh ×0.1 Tariff 3
IR 116 int32 CDAB R kvarh ×0.1 Tariff 4
IR 118 int32 CDAB R VA ×0.1
IR 120 int32 CDAB R VA ×0.1
IR 122 int32 CDAB R A ×0.001
IR 11 uint16 R Must be read on its own (length 1)
IR 770 uint16 bits 12–15 R
IR 770 uint16 bits 8–11 R
IR 770 uint16 bits 0–7 R
IR 772 uint16 bits 12–15 R
IR 772 uint16 bits 8–11 R
IR 772 uint16 bits 0–7 R
IR 20480 string[7] R
IR 41216 uint16 R
HR 4096 uint16 RW
HR 4098 uint16 RW Writable only when the selector is not in LOCK; PFA and PFB models support 3P.n only
HR 4099 uint32 CDAB RW ×0.1 Max 2615.0 on MID models, and CT x VT must stay within that limit; read-only on AV2 models
HR 4101 uint32 CDAB RW ×0.1 Read-only on AV2 and MID models; CT x VT must stay within the limit
HR 4112 uint32 CDAB RW min
HR 4360 uint16 RW
HR 4361 uint16 RW
HR 4609 uint16 RW To change it, write 0x5A00 + tariff (e.g. 0x5A03 for tariff 3); a change resets the demand values
HR 40960 uint16 RW PFA models: A, B, C, G; PFB models: E, F, H
HR 16385 uint16 W Write 1; not in LOCK position
HR 16386 uint16 W Write 1
HR 16387 uint16 W Write 1; not in LOCK position
HR 16388 uint16 W Write 1
HR 16389 uint16 W Write 1

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