ABB AquaMaster 3 flowmeter

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 confirmed at the hardware-verified rung and at no rung below it.

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
flow_rate	5016	F32BE	1	User flow units
flow_percent	5018	F32BE	1	%
pressure	5024	F32BE	1	User units
pressure_percent	5026	F32BE	1	%
left_electrode_impedance	5028	F32BE	1	kOhm
right_electrode_impedance	5030	F32BE	1	kOhm
coil_current	5038	F32BE	1	A
pulse_output_frequency	5040	F32BE	1	Hz
calibrated_velocity	5050	F32BE	1	m/s
voltage_reference	5056	F32BE	1	V
sig_a_volts	5062	F32BE	1	V
sig_b_volts	5064	F32BE	1	V
external_power_voltage	5068	F32BE	1	V
internal_3v8_voltage	5070	F32BE	1	V
internal_3v2_voltage	5072	F32BE	1	V
totaliser_forward	12002	U32BE	1
totaliser_reverse	12004	U32BE	1
totaliser_net	12006	U32BE	1
totaliser_tariff_a	12008	U32BE	1
totaliser_tariff_b	12010	U32BE	1
external_power_status	1020	U16	1
internal_power_status	1022	U16	1

link settings as documented (unverified): RTU; FC 01,02,03,04,05,06,15,16; AquaMaster 3 RS485 MODBUS option implements the MODBUS over Serial Line protocol. Low power mode after 10s inactivity requires 1 retry to wake up within 1s.

bench facts as documented (unverified)

connector	RS485
wiring notes	RS485 MODBUS option
response timeout	1000 ms
protocol notes	Turnaround delay: 800ms. Low power state after 10s inactivity requires 1 retry to wake up.
identification notes	TransmitterUniqueID at RO 32-Bit register 4013
power	Designed for low power consumption so that it can be used with battery or renewable energy supplies (as well as with mains power).
certifications	UKAS Calibration Laboratory No. 0255
doc revision	COI/FET2XX/MOD/TBL–EN
firmware applicability	WAJC2103 v01.00.00 or above

field reports — community-sourced, unverified (checked 2026-06-11)

confirmed: framing: RTU — confirmed by ABB AquaMaster 3 MODBUS Tables Supplement (COI/FET2XX/MOD/TBL-EN) stating it follows Modbus Over Serial Line V1.02 using 2-wire RS485
confirmed: function_codes: [1, 2, 3, 4, 5, 6, 15, 16] — confirmed by ABB AquaMaster 3 MODBUS Tables Supplement (COI/FET2XX/MOD/TBL-EN) register mapping table
confirmed: low power mode after 10s inactivity requires 1 retry to wake up within 1s — confirmed by ABB AquaMaster 3 MODBUS Tables Supplement (COI/FET2XX/MOD/TBL-EN) section 1.1
confirmed: certifications: UKAS Calibration Laboratory No. 0255 — confirmed by ABB AquaMaster 3 User Guide (OI/FET2XX-EN)
confirmed: doc_revision: COI/FET2XX/MOD/TBL–EN — confirmed by ABB AquaMaster 3 MODBUS Tables Supplement (COI/FET2XX/MOD/TBL-EN)
confirmed: firmware_applicability: WAJC2103 v01.00.00 or above — confirmed by ABB AquaMaster 3 MODBUS Tables Supplement (COI/FET2XX/MOD/TBL-EN)
confirmed: TransmitterUniqueID at RO 32-Bit register 4013 — confirmed by ABB AquaMaster 3 MODBUS Tables Supplement (COI/FET2XX/MOD/TBL-EN) which lists TransmitterUniqueID at 1-based address 4013 (0-based 4012)
confirmed: physical: RS485 — confirmed by ABB AquaMaster 3 User Guide (OI/FET2XX-EN)

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.

If your device isn't here, upload its register map. Generation is free, and the connector keeps the rung it earns under testing.

To prove a connector against your own device, order hardware verification. If it doesn't verify, you don't pay.

Platform builders can license the verified library: machine-readable maps, the firmware matrix, API access.