Why do 32-bit register values look scrambled or incorrect?

The ECR380D uses 0-based hexadecimal addressing, and 32-bit registers are stored as two consecutive 16-bit words. If the word order does not match your master's expectation, all uint32 and int32 values will appear wrong. Confirm that your Modbus master reads the high word first (big-endian word order) and swap if the values are implausible.

The Gateway connects but returns exception code 02 on measurement registers. Why?

The ECR380D Modbus table uses 0-based addresses: the measurement block starts at decimal 45056, which is hex B000. If your configuration uses 1-based Modbus reference notation (e.g. register 45056 interpreted as address 5055), you will receive an ILLEGAL DATA ADDRESS exception. Use the raw decimal address 45056 as configured in this template.

No response at all from the meter over RS-485. What should I check?

First confirm the A/B polarity is consistent across all devices on the bus. Then verify that 120-ohm termination resistors are installed at both ends of the RS-485 segment, not in the middle. Also check that baud rate and parity on the ECR380D match the Gateway settings exactly, as a mismatch produces silence rather than an error response.

Active energy reads a value but power reads zero. Is the meter faulty?

This usually indicates a phase sequence wiring error. The ECR380D will display blinking L1/L2/L3 icons if the cabling sequence is wrong. Swap two phase voltage wires (L1 and L2, or L2 and L3) to correct the sequence. If the display shows ERROR N02 or ERROR N03, the meter has a hardware fault and must be replaced.

Free Modbus template: Hager ECR380D

Name: Hager ECR380D
Brand: Hager
SKU: 0f13321b-be38-4b22-999d-8df511608131

The Hager ECR380D is a three-phase, direct-connection energy meter rated at 80 A, MID-certified, and designed for commercial and industrial grid metering on DIN rail. This Modbus RTU template reads per-phase voltages (L1, L2, L3) and line-to-line voltages, per-phase currents, total and per-phase active and reactive power, power factor in both IEC and IEEE conventions, grid frequency, and cumulative imported and exported active and reactive energy broken down by phase. Connecting the ECR380D to your ModbusCloud Gateway gives installers a continuous, structured record of consumption and production without manual meter reads.

Registers (61)

61 read / 0 write

Name	Address	Function	Type	Unit	Access
vendor_name Manufacturer name string stored in device memory.	4096	FC03	string		R
product_code Manufacturer product code identifier string.	4112	FC03	string		R
sw_version Firmware software version string of the meter.	4128	FC03	string		R
vendor_url Manufacturer website URL string.	4130	FC03	string		R
product_name Full product name string from device memory.	4146	FC03	string		R
model_name Device model designation string.	4162	FC03	string		R
application_name Application or configuration profile name string.	4178	FC03	string		R
hw_version Hardware revision version string.	4194	FC03	string		R
production_code_serial_number Unit serial number assigned at production.	4196	FC03	string		R
production_site_code Factory or production site identifier string.	4212	FC03	string		R
production_day_of_year Day of year the unit was manufactured, 1 to 366.	4214	FC03	uint16		R
production_year Calendar year the unit was manufactured.	4215	FC03	uint16		R
voltage_l1 Phase L1 to neutral voltage, volts.	45056	FC03	uint16	V	R
voltage_l2 Phase L2 to neutral voltage, volts.	45057	FC03	uint16	V	R
voltage_l3 Phase L3 to neutral voltage, volts.	45058	FC03	uint16	V	R
v_l1_l2 Line-to-line voltage between L1 and L2.	45059	FC03	uint16	V	R
v_l2_l3 Line-to-line voltage between L2 and L3.	45060	FC03	uint16	V	R
v_l3_l1 Line-to-line voltage between L3 and L1.	45061	FC03	uint16	V	R
frequency Grid frequency, hertz, typically 50 or 60.	45062	FC03	uint16	Hz	R
current_l1 RMS current on phase L1, amperes.	45065	FC03	uint32	A	R
current_l2 RMS current on phase L2, amperes.	45067	FC03	uint32	A	R
current_l3 RMS current on phase L3, amperes.	45069	FC03	uint32	A	R
i_neutral Neutral conductor current, unscaled raw value.	45071	FC03	uint32	A	R
active_power Total three-phase active power, watts, signed.	45073	FC03	int32	W	R
reactive_power Total three-phase reactive power, var, signed.	45075	FC03	int32	var	R
s_sum Total apparent power, unscaled raw value.	45077	FC03	uint32	VA	R
pf_sum_iec Total power factor per IEC convention, signed.	45079	FC03	int16		R
pf_sum_ieee Total power factor per IEEE convention, signed.	45080	FC03	int16		R
active_power_l1 Active power on phase L1, watts, signed.	45081	FC03	int32	W	R
active_power_l2 Active power on phase L2, watts, signed.	45083	FC03	int32	W	R
active_power_l3 Active power on phase L3, watts, signed.	45085	FC03	int32	W	R
reactive_power_l1 Reactive power on phase L1, signed.	45087	FC03	int32	W	R
reactive_power_l2 Reactive power on phase L2, signed.	45089	FC03	int32	W	R
reactive_power_l3 Reactive power on phase L3, signed.	45091	FC03	int32	W	R
s_l1 Apparent power on phase L1, unscaled raw value.	45093	FC03	uint32	VA	R
s_l2 Apparent power on phase L2, unscaled raw value.	45095	FC03	uint32	VA	R
s_l3 Apparent power on phase L3, unscaled raw value.	45097	FC03	uint32	VA	R
pf_l1_iec Phase L1 power factor per IEC convention, signed.	45099	FC03	int16		R
pf_l2_iec Phase L2 power factor per IEC convention, signed.	45100	FC03	int16		R
pf_l3_iec Phase L3 power factor per IEC convention, signed.	45101	FC03	int16		R
pf_l1_ieee Phase L1 power factor per IEEE convention, signed.	45102	FC03	int16		R
pf_l2_ieee Phase L2 power factor per IEEE convention, signed.	45103	FC03	int16		R
pf_l3_ieee Phase L3 power factor per IEEE convention, signed.	45104	FC03	int16		R
active_consumption_energy Cumulative imported active energy, watt-hours.	45152	FC03	uint32	Wh	R
er_plus_sum Cumulative imported reactive energy, unscaled total.	45154	FC03	uint32	varh	R
active_production_energy Cumulative exported active energy, watt-hours.	45156	FC03	uint32	Wh	R
er_minus_sum Cumulative exported reactive energy, unscaled total.	45158	FC03	uint32	varh	R
ea_plus_detailed_sum Detailed cumulative imported active energy, unscaled.	45160	FC03	uint32	Wh	R
ea_minus_detailed_sum Detailed cumulative exported active energy, unscaled.	45162	FC03	uint32	Wh	R
active_consumption_energy_l1 Cumulative imported active energy on phase L1.	45440	FC03	uint32	Wh	R
active_consumption_energy_l2 Cumulative imported active energy on phase L2.	45442	FC03	uint32	Wh	R
active_consumption_energy_l3 Cumulative imported active energy on phase L3.	45444	FC03	uint32	Wh	R
active_production_energy_l1 Cumulative exported active energy on phase L1.	45446	FC03	uint32	Wh	R
active_production_energy_l2 Cumulative exported active energy on phase L2.	45448	FC03	uint32	Wh	R
active_production_energy_l3 Cumulative exported active energy on phase L3.	45450	FC03	uint32	Wh	R
er_plus_l1 Cumulative imported reactive energy on phase L1.	45452	FC03	uint32	varh	R
er_plus_l2 Cumulative imported reactive energy on phase L2.	45454	FC03	uint32	varh	R
er_plus_l3 Cumulative imported reactive energy on phase L3.	45456	FC03	uint32	varh	R
er_minus_l1 Cumulative exported reactive energy on phase L1.	45458	FC03	uint32	varh	R
er_minus_l2 Cumulative exported reactive energy on phase L2.	45460	FC03	uint32	varh	R
er_minus_l3 Cumulative exported reactive energy on phase L3.	45462	FC03	uint32	varh	R