Toshiba VF-AS3 drive

Register map(s) for this device, with a note of how far each has been checked. Addresses are 0-based, as on the wire. Scale and byte order are confirmed only at the hardware-verified rung.

coherence-checked

Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.

point	address (0-based)	type	scale	unit
Command mode selection	3	U16	1
Frequency setting mode selection 1	4	U16	1
Setting of acceleration / deceleration time unit	1305	U16	1
Integrating wattmeter display unit selection	1865	U16	1
MODBUS continuous address	2096	U16	1
Number of motor pole pair for communication	2134	U16	1
Communication function reset	2201	U16	1
Device Name 1	49281	U16	1
Device Name 2	49282	U16	1
Device Name 3	49283	U16	1
Device Name 4	49284	U16	1
Device Name 5	49285	U16	1
Device Name 6	49286	U16	1
Device Name 7	49287	U16	1
Device Name 8	49288	U16	1
Device Name 9	49289	U16	1
Device Name 10	49290	U16	1
Device Name 11	49291	U16	1
Device Name 12	49292	U16	1
Device Name 13	49293	U16	1
Device Name 14	49294	U16	1
Device Name 15	49295	U16	1
Device Name 16	49296	U16	1
Emb Eth. Communication error detection delay	50694	U16	0.1	sec
Emb Eth. Communication error operation	50695	U16	1
Emb Eth. Preset speed at communication error	50696	U16	1
Emb Eth. Communication error detection	50697	U16	1
Emb Eth. IP setting mode	50698	U16	1
Emb Eth. IP address setting value 1	50699	U16	1
Emb Eth. IP address setting value 2	50700	U16	1
Emb Eth. IP address setting value 3	50701	U16	1
Emb Eth. IP address setting value 4	50702	U16	1
Emb Eth. Subnet mask setting value 1	50703	U16	1
Emb Eth. Subnet mask setting value 2	50704	U16	1
Emb Eth. Subnet mask setting value 3	50705	U16	1
Emb Eth. Subnet mask setting value 4	50706	U16	1
Emb Eth. Default gateway setting value 1	50707	U16	1
Emb Eth. Default gateway setting value 2	50708	U16	1
Emb Eth. Default gateway setting value 3	50709	U16	1
Emb Eth. Default gateway setting value 4	50710	U16	1
Emb Eth. MAC address monitor 1	50723	U16	1
Emb Eth. MAC address monitor 2	50724	U16	1
Emb Eth. MAC address monitor 3	50725	U16	1
Emb Eth. MAC address monitor 4	50726	U16	1
Emb Eth. MAC address monitor 5	50727	U16	1
Emb Eth. MAC address monitor 6	50728	U16	1
Emb Eth. IP address monitor 1	50729	U16	1
Emb Eth. IP address monitor 2	50730	U16	1
Emb Eth. IP address monitor 3	50731	U16	1
Emb Eth. IP address monitor 4	50732	U16	1
Emb Eth. Subnet mask monitor 1	50733	U16	1
Emb Eth. Subnet mask monitor 2	50734	U16	1
Emb Eth. Subnet mask monitor 3	50735	U16	1
Emb Eth. Subnet mask monitor 4	50736	U16	1
Emb Eth. Default gateway monitor 1	50737	U16	1
Emb Eth. Default gateway monitor 2	50738	U16	1
Emb Eth. Default gateway monitor 3	50739	U16	1
Emb Eth. Default gateway monitor 4	50740	U16	1
Emb Eth. Scanner input select 1	50753	U16	1
Emb Eth. Scanner input select 2	50754	U16	1
Emb Eth. Scanner input select 3	50755	U16	1
Emb Eth. Scanner input select 4	50756	U16	1
Emb Eth. Scanner input select 5	50757	U16	1
Emb Eth. Scanner input select 6	50758	U16	1
Emb Eth. Scanner input select 7	50759	U16	1
Emb Eth. Scanner input select 8	50760	U16	1
Emb Eth. Scanner output select 1	50769	U16	1
Emb Eth. Scanner output select 2	50770	U16	1
Emb Eth. Scanner output select 3	50771	U16	1
Emb Eth. Scanner output select 4	50772	U16	1
Emb Eth. Scanner output select 5	50773	U16	1
Emb Eth. Scanner output select 6	50774	U16	1
Emb Eth. Scanner output select 7	50775	U16	1
Emb Eth. Scanner output select 8	50776	U16	1
Emb Eth. I/O scan timeout detection time	50790	U16	0.1	s
Emb Eth. Web server	50792	U16	1
Emb Eth. Web server reset	50793	U16	1
Emb Eth. Unit ID	50794	U16	1
Emb Eth. Command monitor	50838	U16	1
Emb Eth. Frequency command monitor	50839	U16	1
Emb Eth. Error monitor	50840	U16	1
Emb Eth. External error monitor	50841	U16	1
Communication command1 from embedded ethernet	64054	U16	1
Frequency command from embedded ethernet	64055	U16	0.01	Hz
Communication command 2 from embedded ethernet	64056	U16	1
Torque command setting from embedded ethernet	64064	U16	0.01	%
Terminal output data	64080	U16	1
Alarm code	64657	U16	1
Output frequency	64768	U16	0.01	Hz
Inverter status 1	64769	U16	1
Output current	64771	U16	0.01	%
Input voltage (DC detection)	64772	U16	0.01	% (V)
Output voltage	64773	U16	0.01	% (V)
Input terminal status	64774	U16	1
Output terminal status	64775	U16	1
Speed feedback frequency (real time)	64790	I16	0.01	Hz
Torque	64792	I16	0.01	% (Nm)
Torque current	64796	U16	1
PID feedback value	64802	U16	0.01	Hz
Motor overload factor	64803	U16	1
Inverter overload factor	64804	U16	1
Braking resistor overload factor	64805	U16	1
Motor load factor	64806	U16	1
Inverter load factor	64807	U16	1
Input power	64809	U16	0.01	kW
Cumulative run time for monitor	65044	U16	1	hour
Terminal RR input value	65077	U16	0.01	%
Terminal RX input value	65078	I16	0.01	%
Terminal II input value	65079	U16	0.01	%
FM output monitor	65088	U16	1
AM output monitor	65089	U16	1

link settings as documented (unverified): TCP; unit ID 0; FC 03,06,16,23,43; Modbus TCP over Ethernet. Unit ID 0 or C670 value is used to access the inverter. Unit ID 255 is used for the I/O Scanner.

bench facts as documented (unverified)

connector	Dual RJ45 shielded connector
wiring notes	Supports Daisy chain topology and Star topology. Auto MDI-X and LLDP are supported.
max registers/read	63
protocol notes	Writing via function codes 06 and 16 writes to EEPROM, which has a lifespan of approximately 100,000 writes. Writing via function code 23 (I/O scanning) writes to RAM.
identification notes	Supports Read Device Identification (0x2B) for Basic and Regular Device ID.
FC 43 device ID	supported
doc revision	E6582125②

⚠ disputed: output_power @ 64810 — disputed by Embedded Ethernet Function Manual E6582125, which states output_power is at 0xFD30 (64816). 64810 (0xFD2A) is an invalid/unused address.

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

Siemens S7-1200 MB_CLIENT block may return error 8381 (Function code not supported) when attempting to read registers like FD01h (64769) if the Unit ID is set to 0. To resolve this, change the inverter's C670 parameter (Emb Eth. Unit ID) to 1 and set the PLC's MB_Unit_ID to 1. [source]
The VF-AS3 does not have parameters for communication numbers ending in A through F (e.g., 0xXXXA to 0xXXXF and 0xXXAX to 0xXXFX). Reading a block of registers that spans these non-existent ranges will result in a Modbus error unless parameter F830 (MODBUS continuous address) is enabled (set to 1), which allows the drive to skip these addresses. [source]
confirmed: comms defaults and function codes (03, 06, 16, 23, 43) — confirmed by Embedded Ethernet Function Manual E6582125
confirmed: Unit ID 0 or C670 value is used to access the inverter, and Unit ID 255 is used for the I/O Scanner — confirmed by Embedded Ethernet Function Manual E6582125
confirmed: Dual RJ45 shielded connector supporting Daisy chain and Star topologies, Auto MDI-X, and LLDP — confirmed by Embedded Ethernet Function Manual E6582125
confirmed: Writing via FC06 and FC16 writes to EEPROM (lifespan ~100,000 writes), while FC23 writes to RAM — confirmed by Embedded Ethernet Function Manual E6582125
confirmed: frequency_command @ 64055 (0xFA07) — confirmed by Embedded Ethernet Function Manual E6582125
confirmed: torque_command @ 64064 (0xFA40) — confirmed by Embedded Ethernet Function Manual E6582125
confirmed: alarm_code @ 64657 (0xFC91) — confirmed by Embedded Ethernet Function Manual E6582125
confirmed: output_frequency @ 64768 (0xFD00) — confirmed by Embedded Ethernet Function Manual E6582125

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.
coherence-checked — Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.
hardware-verified (software-key) x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

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