ABB TRIO-20.0/27.6-TL-OUTD string inverter

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
inverter_global_state	123	U16	1	Decimal
inverter_state	124	U16	1	Decimal
inverter_dcdc_channel_1_state	125	U16	1	Decimal
inverter_dcdc_channel_2_state	126	U16	1	Decimal
inverter_alarm_state	127	U16	1	Decimal
inverter_daily_energy	131	F32BE	1	Wh
inverter_total_energy	133	F32BE	1	kWh
inverter_partial_energy	135	F32BE	1	kWh
inverter_week_energy	137	F32BE	1	kWh
inverter_monthly_energy	139	F32BE	1	kWh
inverter_yearly_energy	141	F32BE	1	kWh
inverter_grid_voltage	143	F32BE	1	V
inverter_grid_current	145	F32BE	1	A
inverter_grid_power	147	F32BE	1	W
inverter_frequency	149	F32BE	1	Hz
inverter_input_1_power	151	F32BE	1	W
inverter_input_1_voltage	153	F32BE	1	V
inverter_input_1_current	155	F32BE	1	A
inverter_input_2_power	157	F32BE	1	W
inverter_input_2_voltage	159	F32BE	1	V
inverter_input_2_current	161	F32BE	1	A
inverter_temperature	163	F32BE	1	°C
inverter_booster_temperature	165	F32BE	1	°C
inverter_isolation_resistance	167	F32BE	1	MΩ
inverter_cos_phi	171	F32BE	1	N/A
heartbeat_counter	299	U16	1	Decimal
inverter_grid_reactive_power_holding	300	F32BE	1	VAR
inverter_grid_voltage_holding	302	F32BE	1	V
inverter_grid_power_holding	304	F32BE	1	W
inverter_grid_current_holding	306	F32BE	1	A

link settings as documented (unverified): RTU; default 19200 8N1; FC 03,04,06,16; Interface: RS-485 (half duplex). Start bit: 1, Stop bit: 1, Parity: No parity, Data bits: 8. Default baud rate is 9600 on USA and Japan versions, and 19200 on Europe versions.

bench facts as documented (unverified)

terminals	RS-485 serial line
broadcast	supported
model register	115
serial register	103
identification notes	Model identifier register is 115 (0-based). Serial number registers are 103 to 108 (0-based).
doc revision	1.6
firmware applicability	Minimum Inverter Update Version: 1542C for Europe version; 1542D for USA and Japan version

generated by gemini:gemini-3.5-flash · harvested from https://library.e.abb.com/public/c4f8b5d142a7488da678076c3ae01caf/Modbus_RTU_register_map_for_TRIO-20.0(27.6)-TL-OUTD_Revision_1.6.pdf (ABB); 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.