Yaskawa V7/E7/F7 drive (Modbus)

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
command	1	U16	1
frequency_reference	2	U16	0.01
pid_setpoint	6	U16	0.1
analog_output_1_setting	7	I16	1	VDC
analog_output_2_setting	8	I16	1	VDC
u1_01_frequency_ref	64	U16	0.01
u1_02_output_freq	65	U16	0.01
u1_03_output_current	66	U16	0.1
u1_05_motor_speed	68	U16	1
u1_06_output_voltage	69	U16	0.1
u1_07_dc_bus_voltage	70	U16	1
u1_08_output_kwatts	71	U16	0.1
u1_09_torque_reference	72	I16	0.1
u1_10_input_term_sts	73	U16	1
u1_11_output_term_sts	74	U16	1
u1_12_int_ctl_sts_1	75	U16	1
u1_13_elapsed_time	76	U16	1
u1_15_term_a1_level	78	I16	0.1
u1_16_term_a2_level	79	I16	0.1
u1_17_term_a3_level	80	I16	0.1
u1_24_pid_feedback	87	U16	0.1
u1_29_kwh_lower_4_dig	92	U16	1
u1_30_kwh_upper_5_dig	93	U16	1

link settings as documented (unverified): RTU; default 9600 8N1; unit ID 31; FC 03,06,08,16; RS232 is fixed at 9600 bps, no parity, 8 data bits, 1 stop bit. RS422/RS485 parameters are configurable via H5-xx.

⚠ Caution: Data sent to the F7 drive serially is sent to RAM. To retain it upon power loss, an ENTER command (register 0x0900) must be sent to transfer it to non-volatile memory. Maximum non-volatile writes cannot exceed 100,000. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)

terminals	S+, S-, R+, R-, IG
A/B polarity	+ to + and - to -
termination	S1 switch (Termination Resistor 110 ohm)
connector	RJ45 for RS232, Terminal block for RS422/RS485
shield/ground	IG terminal
wiring notes	RS232 maximum cable length is 50 ft (16m). RS422/RS485 maximum cable length is 4000 ft (1200m).
max registers/read	8
inter-frame delay	3 ms
broadcast	supported
protocol notes	Write multiple registers (10h) allows writing 1 to 16 consecutive registers. A send delay of 5 to 65 ms can be configured via H5-06.
model register	o2-04
firmware register	2010h
FC 43 device ID	not supported
certifications	CE
doc revision	TM.F7.11

generated by gemini:gemini-3.5-flash · harvested from http://www.efesotomasyon.com/html/YASKAWA/yaskawa_F7/Technical%20Manual%20for%20F7%20Modbus.pdf (Yaskawa); 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.