Socomec COUNTIS E28 - Active-energy meters three-phase - direct 80 A - Modbus TCP MID
Monitors three-phase active energy metering via Modbus TCP with MID certification.
Template for the Socomec COUNTIS E28, a three-phase active energy meter with direct 80 A connection and MID certification. It reads voltage, current, power, energy, and frequency across all three phases via Modbus TCP. It also exposes a writable tariff register for energy tariff selection.
- Protocol
- Modbus TCP
- Connection
- Ethernet, Modbus TCP
- Registers
- 24, read and write
- Brand
- Socomec
- Key readings
- Voltage L1 to L3 · Current L1 to L3 · Power L1 to L3 · Total Active Power · Energy Consumption · Frequency
- Available commands
- Tariff
- Compatible models
- COUNTIS E28
- Last updated
Registers (24)
23 read, 1 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Voltage L1 | V | Read | |||
| Voltage L2 | V | Read | |||
| Voltage L3 | V | Read | |||
| Current L1 | A | Read | |||
| Current L2 | A | Read | |||
| Current L3 | A | Read | |||
| Power L1 | W | Read | |||
| Power L2 | W | Read | |||
| Power L3 | W | Read | |||
| Total Active Power | kW | Read | |||
| Frequency | Hz | Read | |||
| Energy Consumption | kWh | Read | |||
| Energy Production | kWh | Read | |||
| Total Apparent Power | VA | Read | |||
| Total Reactive Power | var | Read | |||
| Neutral Current IN | A | Read | |||
| System value I Sys | A | Read | |||
| Phase to Phase Voltage: U12 | V | Read | |||
| Phase to Phase Voltage: U23 | V | Read | |||
| Phase to Phase Voltage: U31 | V | Read | |||
| System value U Sys | V | Read | |||
| System value V Sys | V | Read | |||
| Phase sequence | Read | ||||
| Tariff | Write |
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Use cases
- Monitor real-time voltage, current, and power per phase on a cloud dashboard for commercial buildings.
- Track cumulative energy consumption over time to generate monthly billing reports for tenants.
- Create an alert when total active power exceeds a predefined threshold to avoid demand charges.
- Switch the active tariff register remotely to match time-of-use electricity pricing schedules.
- Compare energy production and consumption values to evaluate on-site generation performance.
- Log frequency deviations to detect grid quality issues at industrial sites.
Installation
Mount the Socomec COUNTIS E28 on a DIN rail and wire the three-phase supply through the direct 80 A terminals according to the manufacturer's wiring diagram.
Connect the meter's Ethernet port to the same local network as the ModbusCloud Gateway using a standard Ethernet cable.
Assign a static IP address to the COUNTIS E28 via its front panel or configuration tool, and note the Modbus TCP port (default 502).
In the ModbusCloud portal, add a new Modbus TCP device using the meter's IP address and port, then import the Socomec COUNTIS E28 template.
Verify byte order settings in the template match the meter's configuration to ensure correct float32 decoding, especially for the Energy Production register at address 74.
Confirm live data appears on the ModbusCloud dashboard by comparing displayed values with the meter's local LCD readout.
Things to watch for
Float32 values appear as incorrect or very large numbers. What is wrong?
The COUNTIS E28 register map uses float32 encoding with a specific byte order. Check whether word swap (big-endian or little-endian word order) is set correctly in the ModbusCloud device settings. Compare a known reading on the LCD with the dashboard value to confirm.
Energy Production reads zero even though the installation has generation. How do I fix this?
The Energy Production register is at address 74, which is outside the main 50xxx register block. Verify that this register is included in the poll configuration and that its data type is set to float32.
Can I use this template with the COUNTIS E27 or other Socomec meters?
This template is mapped specifically for the COUNTIS E28 with Modbus TCP. Other models may have different register addresses or communication protocols. Use a dedicated template for other Socomec meters to avoid mismatched data.
Do I need current transformers for loads up to 80 A?
No. The COUNTIS E28 supports direct connection up to 80 A, so CTs are not required within that range. For loads exceeding 80 A, a CT-connected Socomec model would be needed instead.
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