Socomec DIRIS A40/A41 power meter

Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based as on the wire; word order and scaling are only confirmed at the hardware-verified rung.

interop-verified

Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.

point	address (0-based)	type	scale	unit
hour_meter	50512	U32BE	0.01	1/100 h
phase_to_phase_voltage_u12	50514	U32BE	0.01	V/100
phase_to_phase_voltage_u23	50516	U32BE	0.01	V/100
phase_to_phase_voltage_u31	50518	U32BE	0.01	V/100
simple_voltage_v1	50520	U32BE	0.01	V/100
simple_voltage_v2	50522	U32BE	0.01	V/100
simple_voltage_v3	50524	U32BE	0.01	V/100
frequency	50526	U32BE	0.01	Hz/100
current_i1	50528	U32BE	0.001	mA
current_i2	50530	U32BE	0.001	mA
current_i3	50532	U32BE	0.001	mA
neutral_current	50534	U32BE	0.001	mA
active_power	50536	U32BE	0.01	kW/100 (Signed)
reactive_power	50538	U32BE	0.01	kvar/100 (Signed)
apparent_power	50540	U32BE	0.01	kVA/100
power_factor	50542	U32BE	0.001	0.001 (Signed)
active_power_phase_1	50544	U32BE	0.01	kW/100 (Signed)
active_power_phase_2	50546	U32BE	0.01	kW/100 (Signed)
active_power_phase_3	50548	U32BE	0.01	kW/100 (Signed)
reactive_power_phase_1	50550	U32BE	0.01	kvar/100 (Signed)
reactive_power_phase_2	50552	U32BE	0.01	kvar/100 (Signed)
reactive_power_phase_3	50554	U32BE	0.01	kvar/100 (Signed)
apparent_power_phase_1	50556	U32BE	0.01	kVA/100
apparent_power_phase_2	50558	U32BE	0.01	kVA/100
apparent_power_phase_3	50560	U32BE	0.01	kVA/100
power_factor_phase_1	50562	U32BE	0.001	0.001 (Signed)
power_factor_phase_2	50564	U32BE	0.001	0.001 (Signed)
power_factor_phase_3	50566	U32BE	0.001	0.001 (Signed)
partial_positive_active_energy	50780	U32BE	1	kWh
partial_positive_reactive_energy	50782	U32BE	1	kvarh
module_temperature	51457	U16	1
thd_u12	51536	U16	0.1
thd_u23	51537	U16	0.1
thd_u31	51538	U16	0.1
thd_v1	51539	U16	0.1
thd_v2	51540	U16	0.1
thd_v3	51541	U16	0.1
thd_i1	51542	U16	0.1
thd_i2	51543	U16	0.1
thd_i3	51544	U16	0.1
thd_in	51545	U16	0.1

link settings as documented (unverified): RTU; default 38400 8O1; unit ID 1; FC 03; PLC programming examples suggest default/matching port settings of 38.4/8/Odd/1 and Slave ID 1.

bench facts as documented (unverified)

terminals	Diris A10 RS-485 Port: NC, +, - (terminals 13, 15, 17). Diris A20 RS-485 Optional Module: +, -, 0.
termination	Diris A10: 120 ohm resistor supplied as loose component to connect between + and - terminals at last slave. Diris A20: Set the 2 DIP switches on the last module on the bus to ON.
shield/ground	Only link the shield to the end on one end to guarantee the same potential of the shield. There is no other required earthing.
power	Diris A20: 110 / 240 VAC, 120 / 250 VDC. Diris A10: 110-277 VAC.
environment	50 or 60 Hz distribution system. Max voltage across voltage-input terminals (V1, V2, V3, VN) 520VAC phase-to-phase or 300VAC phase-to-neutral. Max current of 6A on current-input terminals (I1, I2, I3).

generated by gemini:gemini-3.5-flash · harvested from https://cdn.automationdirect.com/static/manuals/disconnects/dirisa.pdf (Socomec); manual-faithful — the document's claims, panel risk: LOW — panel concurs, no field disagreements; proved interop-verified on 2026-06-10 · recorded 2026-06-10

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

generated — A prompt produced it. Unproven — anyone can regenerate this.
structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
interop-verified — Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.
simulator-verified — Decoded correctly against a protocol emulator seeded with known-true values — catches word-order/scaling errors vs the emulator, not the physical device.
hardware-verified x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

Have a device that isn't here? Upload its register map — generation is free, and the connector earns its rung by being proven, not claimed.

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