Heidelberg/Amperfied Energy Control wallbox (Modbus RTU)

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
modbus_register_layouts_version	4	U16	1
charging_state	5	U16	1
l1_current_rms	6	U16	0.1	0.1 A
l2_current_rms	7	U16	0.1	0.1 A
l3_current_rms	8	U16	0.1	0.1 A
pcb_temperature	9	I16	0.1	0.1 °C
voltage_l1_n_rms	10	U16	1	V
voltage_l2_n_rms	11	U16	1	V
voltage_l3_n_rms	12	U16	1	V
extern_lock_state	13	U16	1
power	14	U16	1	VA
energy_since_power_on	15	U32BE	1	VAh
energy_since_installation	17	U32BE	1	VAh
hardware_configuration_maximal_current	100	U16	1	A
hardware_configuration_minimal_current	101	U16	1	A
modbus_master_watchdog_timeout	257	U16	1	ms
standby_function_control	258	U16	1
remote_lock	259	U16	1
maximal_current_command	261	U16	0.1	0.1 A
failsafe_current_configuration	262	U16	0.1	0.1 A

link settings as documented (unverified): FC 03,04,06

bench facts as documented (unverified)

model register	200
firmware register	203
doc revision	Status 22 February 2021

generated by gemini:gemini-3.5-flash · harvested from https://www.amperfied.de/wp-content/uploads/2022/06/ModBus-Register-Tabelle.pdf (Amperfied (Heidelberg)); manual-faithful — the document's claims, panel risk: ELEVATED — panel is not confident; 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.

Need it proven on your own device? Hardware verification — if it doesn't verify, you don't pay.

Building a platform? License the verified library — machine-readable maps, firmware matrix, API access.