Carlo Gavazzi EM580 (three-phase, Eichrecht signing meter for EV chargers)

Status: Vendor Confirmed · Register points: 76 · Transports: Modbus RTU

A curated ModDef profile for the Carlo Gavazzi EM580 (three-phase, Eichrecht signing meter for EV chargers). Import it as carlogavazzi.em580 or load the .moddef.yaml directly.

Connect to one over Web Serial and watch its values live in the device dashboard.

Usage

Load the profile, bind a transport, and read a point by name. The runtime applies the offset, scaling, byte order, and sentinels from the definition.

Go

doc, _ := moddef.Load("carlo-gavazzi-em580.moddef.yaml")
dev, _ := client.New(doc, "carlo-gavazzi-em580", transport) // your modbus.Transport
v, _ := dev.ReadPoint(ctx, "voltage_l1_n")
fmt.Println(v)

TypeScript

import {Device} from '@moddef/core';
import {loadDocument} from '@moddef/core/node';

const doc = await loadDocument('carlo-gavazzi-em580.moddef.yaml');
const dev = Device.create(doc, 'carlo-gavazzi-em580', transport);
console.log(await dev.readPoint('voltage_l1_n'));

Rust

let doc = moddef_core::load("carlo-gavazzi-em580.moddef.yaml")?;
let mut dev = Device::new(&doc, Some("carlo-gavazzi-em580"), transport)?;
let v = dev.read_point("voltage_l1_n").await?;

Python

from moddef import Device, load
from moddef.pymodbus import Options, PymodbusTransport

doc = load("carlo-gavazzi-em580.moddef.yaml")
transport = await PymodbusTransport.tcp("192.168.1.50", options=Options())
dev = Device.create(doc, "carlo-gavazzi-em580", transport)
print(await dev.read_point("voltage_l1_n"))

C

md_doc_t doc;
md_doc_init(&doc, flash_ptr, flash_len);        /* zero-copy view */

md_dev_t dev;
md_dev_init(&dev, &doc, MD_STR("carlo-gavazzi-em580"), &transport);

md_value_t v;
md_dev_read(&dev, MD_STR("voltage_l1_n"), &v);

C++

auto doc = moddef::Document::view(flash_bytes).value();   // zero-copy over flash
auto dev = moddef::Device::open(doc, "carlo-gavazzi-em580", transport).value();

if (auto v = dev->read("voltage_l1_n"); v)
    std::cout << v->to_string() << '\n';

Commands

Multi-step register procedures (spec §11.7) this profile defines — write params, arm a trigger, poll for completion, then read the result. Run one with your language's command executor (RunCommand, runCommand, run_command, or md_cmd_begin/md_cmd_tick in C/C++).

start_transaction — Start Transaction

Write the OCMF identification fields and begin a signed charging session ('B')

Params

Field	Type	Required
transaction_id	STRING
evse_id	STRING
identification_status	enum ocmf_identification_status
identification_level	enum ocmf_identification_level
identification_type	enum ocmf_identification_type
identification_data	STRING
identification_flags_rfid	enum ocmf_identification_flags_rfid
identification_flags_ocpp	enum ocmf_identification_flags_ocpp
identification_flags_iso15118	enum ocmf_identification_flags_iso15118
identification_flags_plmn	enum ocmf_identification_flags_plmn
tariff_text	STRING

Results

Field	Type
status	—
transaction_id	STRING

stop_transaction — Stop Transaction

End the charging session ('E'), wait for the signed OCMF file, read it, and confirm the read to release the meter

Results

Field	Type
ocmf	BYTES
length	UINT32
transaction_id	UINT32

Measurands

The 10 semantic quantities this device reports, each linked to the measurand catalog. Query a device by measurand instead of a raw point when you want portable code.

Base quantity	Name	Unit	Description
voltage	Voltage	V	RMS voltage; qualify with phase_ref (L1_N, L1_L2, ...)
current	Current	A	RMS current; qualify with phase_ref / direction
active_power	Active Power	W	Instantaneous real power
apparent_power	Apparent Power	VA	Instantaneous apparent power
reactive_power	Reactive Power	var	Instantaneous reactive power
power_factor	Power Factor	1 (ratio)	Ratio of real to apparent power (dimensionless)
frequency	Frequency	Hz	Grid frequency
energy_active	Active Energy	Wh	Cumulative active energy register
energy_reactive	Reactive Energy	varh	Cumulative reactive energy register
energy_apparent	Apparent Energy	VAh	Cumulative apparent energy register

Source

• Profile: energy-meter/carlo-gavazzi-em580/carlo-gavazzi-em580.moddef.yaml
• Register map: vendor documentation