ebm-papst EC fan (product range)

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
default_set_value	53249	U16	1
operating_hours_counter	53257	U16	1	h
operating_minutes_counter	53258	U16	1	min
actual_speed	53264	U16	1	rpm
motor_status	53265	U16	1
warning	53266	U16	1
dc_link_voltage	53267	U16	1
dc_link_current	53268	U16	1
module_temperature	53269	I16	1
motor_temperature	53270	I16	1
electronics_interior_temperature	53271	I16	1
current_direction_of_rotation	53272	U16	1
current_modulation_level	53273	U16	0.0015258789
current_set_value	53274	U16	1	%
actual_sensor_value	53275	U16	0.00015258789
enable_input_status	53276	U16	1
current_parameter_set	53277	U16	1
current_control_function	53278	U16	1
current_power	53281	U16	1
actual_sensor_value_1	53283	U16	0.00015258789
actual_sensor_value_2	53284	U16	0.00015258789
operating_hours_counter_backup	53632	U16	1	h
reference_dc_link_voltage	53664	U16	0.02	mV
reference_dc_link_current	53665	U16	0.002	mA

link settings as documented (unverified): RTU; default 19200 8E1; unit ID 1; FC 03,04,06,08,16,67,68,70,80; Maximum telegram length is 23 bytes. Custom function codes 0x43, 0x44, 0x46, 0x50 are supported for addressing via serial number.

bench facts as documented (unverified)

terminals	RS485 twisted pair
wiring notes	A twisted pair wire with RS485 standard should preferably be used.
max registers/read	9
broadcast	supported
protocol notes	Maximum telegram length is 23 bytes. Holding registers range 0xD000 to 0xD37F, Input registers range 0xD000 to 0xD026.
model register	53669
serial register	53666
firmware register	53251
identification notes	Model register is D1A5 (Holding), Serial register is D1A2 (Holding), Firmware register is D003 (Input).
doc revision	V5.00

generated by gemini:gemini-3.5-flash · harvested from https://ebmpapst.se/sv/dat/site_common/upload/MODBUS_parameter_specifications_V5.00.pdf (ebm-papst); 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.