ABB FSCA-01 Modbus adapter (ACS580/880)

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
control_word	0	U16	1
reference_1	1	I16	1
reference_2	2	I16	1
status_word	3	U16	1
actual_value_1	4	I16	1
actual_value_2	5	I16	1
status_word_enhanced	50	U16	1
actual_value_1_enhanced	51	I16	1
actual_value_2_enhanced	52	I16	1
reset_internal_error_registers	89	U16	1
failed_query_function_code	90	U16	1
internal_error_code	91	U16	1
failed_register	92	U16	1
last_written_register	93	U16	1
last_read_register	94	U16	1

link settings as documented (unverified): RTU; default 9600 8N1; unit ID 1; FC 03,06,08,16,23,43

bench facts as documented (unverified)

terminals	X1
wiring notes	RS-485 Adapter Module
FC 43 device ID	supported
doc revision	3AUA0000044530 REV A

generated by gemini:gemini-3.5-flash · harvested from https://library.e.abb.com/public/49472d80c9341126c125751a00361f80/en_fsca-01-PR_a_screen.pdf (ABB); 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.

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.