All three registers return zero or no value. What is wrong?

Confirm the meter's Modbus TCP service is active in its communication settings. Socomec Countis E-series meters require Ethernet to be enabled and a valid IP address assigned. Also verify the unit ID in the portal matches the value configured on the meter, which defaults to 1.

The frequency register reads an implausible value. How do I fix this?

Socomec meters encode 32-bit registers in big-endian word order. If your polling tool or gateway is configured for little-endian 32-bit word order, the two 16-bit words will be swapped and produce a nonsense value. Set your Modbus client to big-endian (high word first) for all uint32 registers on this device.

Energy counters appear stuck even though the meter is live.

The active consumption and production energy registers (50946 and 50952) are cumulative counters. If the meter was recently reset or replaced, the counters restart from zero and will only show movement once new energy flows occur. Cross-check the meter display to confirm the local counter is incrementing.

The gateway connects but drops readings every few minutes. Why?

This typically indicates a network issue: duplicate IP addresses on the LAN, a switch port with STP delay, or the meter's TCP connection timeout being too short. Assign a static IP to the meter, ensure no DHCP conflicts exist, and reduce the polling interval in the portal to keep the TCP session alive.

Free Modbus template: Socomec Singlephase

The Socomec Singlephase is a DIN-rail active energy meter from Socomec designed for single-phase electrical networks in residential, commercial, and light-industrial applications. This Modbus TCP template reads three registers from the meter: grid frequency, cumulative consumed energy, and cumulative exported energy. Connected via the ModbusCloud Gateway, the portal gives installers and building owners a continuous record of import and export totals alongside grid frequency, enabling reliable energy accounting without additional hardware.

Name	Address	Function	Type	Unit	Access
frequency AC grid frequency in hertz, typically 50 Hz in Europe.	•••	•••	•••	Hz	R
active_consumption_energy Cumulative active energy consumed from the grid, watt-hours.	•••	•••	•••	Wh	R
active_production_energy Cumulative active energy exported to the grid, watt-hours.	•••	•••	•••	Wh	R

Socomec Singlephase

Overview

Use cases

Installation

Things to watch for

Registers (3)

Working with Modbus in your projects?

Question about your setup?

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