Chint CPS SCA-M 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
phase_a_voltage	4097	U16	0.1	0.1V
phase_a_current	4098	U16	0.01	0.01A
phase_a_power	4099	U32BE	0.1	0.1W
phase_a_frequency	4101	U16	0.01	0.01Hz
phase_b_voltage	4102	U16	0.1	0.1V
phase_b_current	4103	U16	0.01	0.01A
phase_b_power	4104	U32BE	0.1	0.1W
phase_b_frequency	4106	U16	0.01	0.01Hz
phase_c_voltage	4107	U16	0.1	0.1V
phase_c_current	4108	U16	0.01	0.01A
phase_c_power	4109	U32BE	0.1	0.1W
phase_c_frequency	4111	U16	0.01	0.01Hz
pv1_voltage	4112	U16	0.1	0.1V
pv1_current	4113	U16	0.01	0.01A
mppt1_power	4114	U32BE	0.1	0.1W
pv2_voltage	4116	U16	0.1	0.1V
pv2_current	4117	U16	0.01	0.01A
mppt2_power	4118	U32BE	0.1	0.1W
pv3_voltage	4120	U16	0.1	0.1V
pv3_current	4121	U16	0.01	0.01A
mppt3_power	4122	U32BE	0.1	0.1W
inner_temperature	4124	I16	1	1°C
inverter_mode	4125	U16	1
error_code	4126	U32BE	1
total_energy	4129	U32BE	1	kWh
total_generation_time	4131	U32BE	1	Hour
today_energy	4135	U32BE	1	wh
active_power	4151	U32BE	0.1	0.1W
reactive_power	4153	U32BE	0.1	0.1Var
today_peak_power	4155	U32BE	0.1	0.1W
power_factor	4157	I16	0.001	0.001
pv4_voltage	4158	U16	0.1	0.1V
pv4_current	4159	U16	0.01	0.01A
mppt4_power	4160	U32BE	0.1	0.1W

link settings as documented (unverified): RTU; default 9600 8N1; unit ID 1; FC 03,06,16; Modbus communication adopts 2-line RS-485 interface, half duplex, and a single host can connect up to 247 inverters.

bench facts as documented (unverified)

terminals	2-line RS-485 interface
wiring notes	D+ and D- connections
max registers/read	124
broadcast	supported
model register	0x1A00
serial register	0x1A10
firmware register	0x1A1C
doc revision	V4.16

generated by gemini:gemini-3.5-flash · harvested from https://chint.it/wp-content/uploads/product-docs/CPS-SCA-M/Manuali/CPS-SCA-M%20Modbus%20Protocol%20V4.16_EN.pdf (Chint Power Systems); 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.