Vogtlin red-y smart mass flow meter/controller

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
gas_flow	0	F32BE	1	mln/min
temperature	2	F32BE	1	°C
totaliser	4	F32BE	1	mln
setpoint_gas_flow	6	F32BE	1	mln/min
measured_value_analog_input	8	F32BE	1	V or mA
valve_control_signal	10	F32BE	1	%
alarm	12	U16	1
hardware_error	13	U16	1
controller_mode	14	U16	1
measuring_range	20	F32BE	1	mln/min
serial_number_hardware	30	U32BE	1
totaliser_scaling_factor	16454	F32BE	1
zero_point_suppression	16460	F32BE	1	mln/min
backflow_detection	16466	F32BE	1

link settings as documented (unverified): RTU; default 9600 8N2; unit ID 247; FC 03,06,08,16; Address range: 01..247. Broadcast to all instruments: 00 => no answer from the instruments.

bench facts as documented (unverified)

terminals	9-pin sub-D connector (male)
A/B polarity	Pin 6: Tx+ RS485 (Y), Pin 7: Tx- RS485 (Z), Pin 8: Rx- RS485 (B), Pin 9: Rx+ RS485 (A)
termination	Bus Terminator Module (BTM 328-2139) available
connector	9-pin sub-D connector (male)
isolation	The RS-485/RS-232 converter should be galvanically isolated.
shield/ground	Use separate cables for signal ground pin 1 and power supply ground pin 2 to avoid interference problems.
inter-frame delay	4 ms
broadcast	supported
protocol notes	The number of bytes to be transmitted is limited to 20 because of the limited storage capacity of the RAM.
model register	0x0023..0x0026
serial register	0x001e..0x001f
firmware register	0x0021
power	+ 24 Vdc -5% / +10%, Massflow meter max. 100 mA, Massflow controller max. 250 mA
environment	Operating temperature 0 – 50°C, Ingress protection IP-50
accuracy	Standard +/- 1,5% of full scale, Hi-Performance +/- 0,3% of full scale, +/- 0,5% of reading
certifications	CE approved
doc revision	smart_E4_1
firmware applicability	This manual is valid for instruments with a serial number up to 109 999

generated by gemini:gemini-3.5-flash · harvested from https://www.voegtlin.com/data/329-3029_en_manualsmart109.pdf (Vogtlin Instruments); 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.