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Delta VFD-E Modbus register map

Delta VFD-E compact drive (RS-485 Modbus): control and status words, output measurements, and the main motor and communication parameters

  • Official
  • 32 registers
  • Modbus RTU
  • Revision 1 · 2026-11-10

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

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Communication

Protocol
Modbus RTU
Unit ID
1
Serial
9600 8N2 · 9600 baud, 8 data bits, none parity, 2 stop bits
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
0-based

Connection values are defaults: the device may be configured differently.

Map

Registers
32 holding registers
Groups
3
Translation tables
12
Revision
1 · 2026-11-10
Added
()
File
maps/delta/vfd-e.mbmap.json · 14 KB · history
SHA-256
5396b63944aaf066809c2b7ab0e2906e4ea4916ce88b016736c82c77856022ba
Manufacturer
deltaww.com

Sources and notes

  • Delta VFD-E Series User Manual · version SW PW V1.11 / CTL V2.11 (04EE), 2008-06
    chapter 4, group 9 communication parameters and section 3.5 address list; also on deltaww.com

Source: Delta VFD-E Series User Manual, SW PW V1.11 / CTL V2.11, June 2008 (04EE)

  • The drive answers the Modbus functions 03 (read), 06 (write one register) and 10 (write several); a parameter GG.nn is the holding register 0xGGnn (Pr.04.01 is 0x0401), and only one parameter can be read per request.
  • Factory serial format is ASCII 7N2 at 9600 bit/s, station 1 (Pr.09.04 = 0). This map assumes RTU 8N2 (Pr.09.04 = 3), so set that parameter on the drive first; the baud rate and station are not changed by it.
  • The manual's address list gives units only for current and voltages (one decimal). The 0.01 Hz scale of the frequency registers follows Pr.01.00 and the other frequency parameters, which have two decimals.
  • The control word (0x2000) and fault bits (0x2002) are write-only; they are listed as bit fields of the same register. To start, write run and direction together in one 0x2000 write.
  • To control the drive over the link set Pr.02.00 = 3 (frequency) and Pr.02.01 = 3 or 4 (run command). Only the most used parameters are listed; any other parameter can be added by its GG.nn address.
  • Written from the manufacturer's manual; not tested on a device.
AreaAddressNameTypeAccessUnitScaleDescription
HR 8192 uint16 bits 0–1 W Bits 1-0 of the command word: stop or run.
HR 8192 uint16 bits 4–5 W Bits 5-4 of the command word.
HR 8192 uint16 bits 6–7 W Bits 7-6 of the command word: acceleration and deceleration set to use.
HR 8193 uint16 RW Hz ×0.01 Frequency set point written through the serial link, in 0.01 Hz (5000 = 50.00 Hz). Used when the master frequency source is RS-485 (Pr.02.00 = 3).
HR 8194 uint16 bit 0 W Bit 0: 1 raises an external fault (EF).
HR 8194 uint16 bit 1 W Bit 1: 1 resets the drive after a fault.
HR 8448 uint16 R Last fault of the drive; 0 means no fault.
HR 8449 uint16 bits 0–1 R Bits 1-0 of the status word: RUN/STOP LED state.
HR 8449 uint16 bit 2 R Bit 2: 1 while a jog command is active.
HR 8449 uint16 bits 3–4 R Bits 4-3 of the status word.
HR 8449 uint16 bit 8 R Bit 8: 1 when the master frequency comes from the serial interface.
HR 8449 uint16 bit 9 R Bit 9: 1 when the master frequency comes from an analog signal.
HR 8449 uint16 bit 10 R Bit 10: 1 when the operation command comes from the serial interface.
HR 8450 uint16 R Hz ×0.01 Frequency set point in use.
HR 8451 uint16 R Hz ×0.01 Output frequency of the drive.
HR 8452 uint16 R A ×0.1 Output current.
HR 8456 uint16 R V ×0.1 DC bus voltage.
HR 8457 uint16 R V ×0.1 Output voltage.
HR 8458 uint16 R °C Temperature of the IGBT.
HR 0 uint16 R Pr.00.00: model code of the drive, which gives its power and rated voltage class.
HR 1 uint16 R A ×0.1 Pr.00.01: rated current of the drive.
HR 2 uint16 RW Pr.00.02: 0 = parameters can be written, 1 = read-only, 9 = reset to factory settings (50 Hz base), 10 = reset to factory settings (60 Hz base).
HR 256 uint16 RW Hz ×0.01 Pr.01.00.
HR 265 uint16 RW s ×0.1 Pr.01.09. The unit is 0.1 s or 0.01 s depending on Pr.01.19.
HR 266 uint16 RW s ×0.1 Pr.01.10. The unit is 0.1 s or 0.01 s depending on Pr.01.19.
HR 512 uint16 RW Pr.02.00.
HR 513 uint16 RW Pr.02.01.
HR 2304 uint16 RW Pr.09.00: Modbus station address of the drive (1 to 254).
HR 2305 uint16 RW Pr.09.01.
HR 2306 uint16 RW Pr.09.02.
HR 2307 uint16 RW s ×0.1 Pr.09.03: 0 disables the check.
HR 2308 uint16 RW Pr.09.04: Modbus mode and frame format.

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