An unofficial summary of facts (addresses, types, units, scaling) from the maker's manual. Not affiliated with the maker; values can differ by firmware or model. Always check the device manual before writing (run commands, settings).
Default communication
| Protocol | Modbus RTU |
|---|---|
| Baud (factory) | 19200 bps — options: 4800, 9600, 19200, 38400 |
| Data · parity · stop | 8 · Even · 1 |
| Max per request | 63 registers |
| Manual address style | Wire address as is (0-based) |
- Addressing: the read example (p.19) sends 02 03 0C 1E 00 04 27 6C to read W3102-W3105 and gets 02 03 08 00 28 02 58 01 F4 00 00 52 B0 (the manual table prints the count as «004», one digit short). The write example is 02 06 23 29 00 0D 92 70 (W9001, p.19) and the FC16 example 02 10 23 29 00 02 04 00 14 00 1E 73 A4 -> 02 10 23 29 00 02 9B B7 (p.20). Manual number = frame address (0-based). All CRCs match calculation.
- Factory settings: Add = OFF (no address assigned; set 1-247 to get replies), tbr 19.2 kbps, tFO 8E1, tto 10 s (pp.32-33). 8O1/8E1/8N1/8N2 and 4.8-38.4 kbps selectable. Changed communication settings take effect after a power cycle (p.31).
- Function codes 03 (up to 63 words), 06, 16 (up to 61 words), 23 (20 read + 20 write words), 43/14 (device identification) and 08 (p.18).
Registers (44)
«Wire» is the 0-based address in the request frame (PortDock's «0-based» notation). Value = raw × scale. Table: HR holding register, IR input register, CO coil, DI discrete input. Function codes in hex.
44
Swipe the table sideways — the first column (manual address) stays put.
| Manual | Wire | Table | Name | Type | Unit · scale | R/W | FC | Details |
|---|---|---|---|---|---|---|---|---|
| 3102 | 3102 (0x0C1E) | HR | SFr switching frequency | U16 | ×0.1 kHz | R | 03 | Manual read example: 4 kHz = 0028h p.19 |
| 3103 | 3103 (0x0C1F) | HR | tFr maximum output frequency | U16 | ×0.1 Hz | R | 03 | Manual read example: 60 Hz = 0258h p.19 |
| 3104 | 3104 (0x0C20) | HR | HSP high speed | U16 | ×0.1 Hz | R | 03 | Manual read example: 50 Hz = 01F4h p.19 |
| 3105 | 3105 (0x0C21) | HR | LSP low speed | U16 | ×0.1 Hz | R | 03 | Manual read example: 0 Hz = 0000h p.19 |
| 6001 | 6001 (0x1771) | HR | Add Modbus address | U16 | R/W | 03·06·10 | 1-247. Changed communication settings take effect after a power cycle Range 0 ~ 247 0 = OFF: no address assigned (factory setting) p.31, p.32 | |
| 6003 | 6003 (0x1773) | HR | tbr Modbus baud rate | U16 | R/W | 03·06·10 | 24 = 4800 bps · 28 = 9600 bps · 32 = 19200 bps (factory setting) · 36 = 38400 bps p.32 | |
| 6004 | 6004 (0x1774) | HR | tFO Modbus data format | U16 | R/W | 03·06·10 | 2 = 8O1 · 3 = 8E1 (factory setting) · 4 = 8N1 · 5 = 8N2 p.32 | |
| 6005 | 6005 (0x1775) | HR | tto Modbus timeout | U16 | ×0.1 s | R/W | 03·06·10 | Factory setting 10 s. SLF1 fault if no request arrives within the time Range 0.1 ~ 30 s p.33, p.80 |
| 6010 | 6010 (0x177A) | HR | M1EC Modbus CRC error count | U16 | R | 03 | Stops at 65535 p.74 | |
| 6011 | 6011 (0x177B) | HR | M1Ct Modbus frames received | U16 | R | 03 | Counts correct and incorrect frames. Wraps from 65535 to 0 p.74 | |
| 9001 | 9001 (0x2329) | HR | ACC acceleration time | U16 | ×0.1 s | R/W | 03·06·10 | Manual write examples: 1.3 s = 000Dh (FC06), 2 s = 20 (FC16) p.19, p.20 |
| 9002 | 9002 (0x232A) | HR | DEC deceleration time | U16 | ×0.1 s | R/W | 03·06·10 | Manual write example: 3 s = 30 (FC16) p.20 |
| 12701 | 12701 (0x319D) | HR | nMA1 Source address of the 1st input word | U16 | R | 03 | Factory setting ETA (status word) p.34 | |
| 12702 | 12702 (0x319E) | HR | nMA2 Source address of the 2nd input word | U16 | R | 03 | Factory setting RFRD (output speed) p.34 | |
| 12703 | 12703 (0x319F) | HR | nMA3 Source address of the 3rd input word | U16 | R | 03 | Factory setting 0 (none) p.34 | |
| 12704 | 12704 (0x31A0) | HR | nMA4 Source address of the 4th input word | U16 | R | 03 | Factory setting 0 (none) p.34 | |
| 12705 | 12705 (0x31A1) | HR | nMA5 Source address of the 5th input word | U16 | R | 03 | Factory setting 0 (none) p.34 | |
| 12706 | 12706 (0x31A2) | HR | nMA6 Source address of the 6th input word | U16 | R | 03 | Factory setting 0 (none) p.34 | |
| 12707 | 12707 (0x31A3) | HR | nMA7 Source address of the 7th input word | U16 | R | 03 | Factory setting 0 (none) p.34 | |
| 12708 | 12708 (0x31A4) | HR | nMA8 Source address of the 8th input word | U16 | R | 03 | Factory setting 0 (none) p.34 | |
| 12721 | 12721 (0x31B1) | HR | nCA1 Destination address of the 1st output word | U16 | R | 03 | Factory setting CMD (command word) p.35 | |
| 12722 | 12722 (0x31B2) | HR | nCA2 Destination address of the 2nd output word | U16 | R | 03 | Factory setting LFRD (speed target) p.35 | |
| 12723 | 12723 (0x31B3) | HR | nCA3 Destination address of the 3rd output word | U16 | R | 03 | Factory setting 0 (none) p.35 | |
| 12724 | 12724 (0x31B4) | HR | nCA4 Destination address of the 4th output word | U16 | R | 03 | Factory setting 0 (none) p.35 | |
| 12725 | 12725 (0x31B5) | HR | nCA5 Destination address of the 5th output word | U16 | R | 03 | Factory setting 0 (none) p.35 | |
| 12726 | 12726 (0x31B6) | HR | nCA6 Destination address of the 6th output word | U16 | R | 03 | Factory setting 0 (none) p.35 | |
| 12727 | 12727 (0x31B7) | HR | nCA7 Destination address of the 7th output word | U16 | R | 03 | Factory setting 0 (none) p.35 | |
| 12728 | 12728 (0x31B8) | HR | nCA8 Destination address of the 8th output word | U16 | R | 03 | Factory setting 0 (none) p.35 | |
| 12741 | 12741 (0x31C5) | HR | nM1 value of input word 1 | U16 | R | 03 | Factory: ETA (status word) value. Value at the address in nMA1. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12742 | 12742 (0x31C6) | HR | nM2 value of input word 2 | U16 | R | 03 | Factory: RFRD (output speed) value. Value at the address in nMA2. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12743 | 12743 (0x31C7) | HR | nM3 value of input word 3 | U16 | R | 03 | Value at the address in nMA3. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12744 | 12744 (0x31C8) | HR | nM4 value of input word 4 | U16 | R | 03 | Value at the address in nMA4. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12745 | 12745 (0x31C9) | HR | nM5 value of input word 5 | U16 | R | 03 | Value at the address in nMA5. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12746 | 12746 (0x31CA) | HR | nM6 value of input word 6 | U16 | R | 03 | Value at the address in nMA6. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12747 | 12747 (0x31CB) | HR | nM7 value of input word 7 | U16 | R | 03 | Value at the address in nMA7. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12748 | 12748 (0x31CC) | HR | nM8 value of input word 8 | U16 | R | 03 | Value at the address in nMA8. The manual application example reads 4 words from 12741 p.36, p.63 | |
| 12761 | 12761 (0x31D9) | HR | nC1 value of output word 1 | U16 | R/W | 03·06·10 | Factory: goes to CMD (command word). Written to the address in nCA1. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 | |
| 12762 | 12762 (0x31DA) | HR | nC2 value of output word 2 | U16 | R/W | 03·06·10 | Factory: goes to LFRD (speed target). Written to the address in nCA2. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 | |
| 12763 | 12763 (0x31DB) | HR | nC3 value of output word 3 | U16 | R/W | 03·06·10 | Written to the address in nCA3. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 | |
| 12764 | 12764 (0x31DC) | HR | nC4 value of output word 4 | U16 | R/W | 03·06·10 | Written to the address in nCA4. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 | |
| 12765 | 12765 (0x31DD) | HR | nC5 value of output word 5 | U16 | R/W | 03·06·10 | Written to the address in nCA5. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 | |
| 12766 | 12766 (0x31DE) | HR | nC6 value of output word 6 | U16 | R/W | 03·06·10 | Written to the address in nCA6. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 | |
| 12767 | 12767 (0x31DF) | HR | nC7 value of output word 7 | U16 | R/W | 03·06·10 | Written to the address in nCA7. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 | |
| 12768 | 12768 (0x31E0) | HR | nC8 value of output word 8 | U16 | R/W | 03·06·10 | Written to the address in nCA8. The manual application example writes 4 words from 12761 with FC23 (17h) p.37, p.63 |
Notes
- Only registers whose address and unit/values are in this manual are included. The Modbus addresses of the command word CMD, status word ETA and speeds (LFRD, RFRD) are not in this manual (they appear only as communication scanner factory assignments), so they are not listed separately; with factory settings, write CMD and LFRD through nC1/nC2 (12761/12762) and read ETA and RFRD through nM1/nM2 (12741/12742). Other parameter addresses are in the communication parameters spreadsheet (NVE41316) and are left out.
- The manual states read/write access only for the communication settings (6001-6005), so apart from 9001/9002 and nC1-8 (writes shown in examples) everything is listed as read (r); nMA/nCA are set from the menus.
Read it with PortDock
- Install the free PortDock Modbus Master and connect with the device's settings.
- On the table toolbar, «Device profile…» → pick this device → «Load». Polling tables, names, types and the Slave ID are filled in (optionally the serial settings too).
- Names carry the unit and scale (e.g. «×0.01 Hz»). Values on screen are raw — multiply by the scale.
- To test your program without the device, PortDock Modbus Slave's «Emulate device…» serves the same map with example values.
Download JSON
- schneider-electric/atv320.json (GitHub raw) · copy on this site · history
- schema.json — format (JSON Schema). table, address (0-based), type and order match the PortDock CSV.
- License: CC BY 4.0 — please cite:
PortDock device register maps, v2026.10 · 09ac1d0b2792, https://portdock.dev/devices/
and this page. LICENSE · data bundle, version and changelog - Found a mistake? Please open a GitHub issue with the manual page.
Sources
- Altivar Machine 320 Variable Speed Drives for Synchronous and Asynchronous Motors Modbus Serial Link Manual — Schneider Electric, NVE41308.01 04/2016 · Modbus functions and examples pp.18-20, communication settings pp.31-33, communication scanner pp.34-37, application example p.63, Modbus diagnostics p.74 · checked 2026-10-24