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) | 9600 bps — options: 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200 |
| Data · parity · stop | 8 · None · 1 |
| Slave ID (factory) | 1 (1~247) |
| 32-bit order | ABCD |
| Max per request | 100 registers |
| Manual address style | Wire address as is (0-based) |
- Addressing: the «Modbus address» in the 8-9 data lists is the frame address. The examples (8-11 to 8-21) describe it as «register number = address + 1»: 01 01 00 02 00 0C 9D CF (coils from DI1 0002h), 01 05 00 00 FF 00 8C 3A (FW 0000h), 01 06 12 16 13 88 60 20 (C99 low word 1216h ← 50.00 Hz), 01 0F 00 02 00 0C 02 17 00 EB A2, 01 10 11 02 00 02 04 00 00 03 E8 B2 98 (F07 1102h/1103h ← 10.00 s), 01 17 52 44 00 02 12 15 00 02 04 00 00 13 88 E8 67 (read W03, write C99), Enter 08 06 08 FF 00 01 7A C3. The replies 01 01 02 08 05 7E 3F, 01 03 14 … F9 14, 01 0F 00 02 00 0C F4 0E, 01 10 11 02 00 02 E5 34 and 01 17 04 00 00 13 88 F4 71 all have CRCs matching calculation.
- Typo in the manual FC03 example (8-12): the start address is written 0011h (01 03 00 11 00 0A), but its CRC C4 08 is calculated for 0010h (0011h gives 95 C8). The reply contents (alarm code, status, 12.34 Hz, 3.00 A, 284.0 V) match the data list layout from 0011h, so 0011h is used.
- Defaults (8-5 to 8-6): station y11 = 1 (1-255), baud y14 = 2 (9600 bps), parity y16 = 3 (none, 1 stop), 8 data bits. To run over communication set F02 (or E102) = 4; for frequency F01 (or C30) = 14. Function codes 01, 03, 05, 06, 08, 0F, 10 and 17h; up to 100 registers for 03h and 10h, 16 each for 17h (8-8). Built-in 110 Ω terminator (SW6, 8-4).
Registers (66)
«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.
66
Swipe the table sideways — the first column (manual address) stays put.
| Manual | Wire | Table | Name | Type | Unit · scale | R/W | FC | Details |
|---|---|---|---|---|---|---|---|---|
| 0000 hex | 0 (0x0000) | CO | FW (forward run) | BIT | R/W | 01·05·0F | 1 = ON. With F02 = 4 (RS-485). Manual example 01 05 00 00 FF 00 8C 3A 8-34~8-35 (PDF 684-685) | |
| 0001 hex | 1 (0x0001) | CO | RV (reverse run) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 0002 hex | 2 (0x0002) | CO | DI1 (multifunction input 1) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 0003 hex | 3 (0x0003) | CO | DI2 (multifunction input 2) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 0004 hex | 4 (0x0004) | CO | DI3 (multifunction input 3) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 0005 hex | 5 (0x0005) | CO | DI4 (multifunction input 4) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 0006 hex | 6 (0x0006) | CO | DI5 (multifunction input 5) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 000D hex | 13 (0x000D) | CO | DI6 (multifunction input 6) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 000E hex | 14 (0x000E) | CO | DI7 (multifunction input 7) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 000F hex | 15 (0x000F) | CO | RS (reset) | BIT | R/W | 01·05·0F | 8-34~8-35 (PDF 684-685) | |
| 0010 hex | 16 (0x0010) | CO | FWR (during forward rotation) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 0011 hex | 17 (0x0011) | CO | RVR (during reverse rotation) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 0013 hex | 19 (0x0013) | CO | INT (inverter shut down) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 0015 hex | 21 (0x0015) | CO | NUV (DC link voltage established) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 0019 hex | 25 (0x0019) | CO | ACC (during acceleration) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 001A hex | 26 (0x001A) | CO | DEC (during deceleration) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 001B hex | 27 (0x001B) | CO | ALM (alarm relay) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 001C hex | 28 (0x001C) | CO | RL (communications effective) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 0020 hex | 32 (0x0020) | CO | FA1 (constant speed arrival) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 0022 hex | 34 (0x0022) | CO | IRDY (operation ready) | BIT | R | 01 | 8-34~8-35 (PDF 684-685) | |
| 0040 hex | 64 (0x0040) | CO | DO1 (multifunction output 1) | BIT | R | 01 | 8-35~8-36 (PDF 685-686) | |
| 0041 hex | 65 (0x0041) | CO | DO2 (multifunction output 2) | BIT | R | 01 | 8-35~8-36 (PDF 685-686) | |
| 0048 hex | 72 (0x0048) | CO | RO (multifunction relay output) | BIT | R | 01 | 8-35~8-36 (PDF 685-686) | |
| 5001h | 20481 (0x5001) | HR | S01 frequency reference (±20000 = max frequency) | S16 | R/W | 03·06·10 | Data format [29]: ±20000 is ±100 % of the maximum output frequency (F03). Used with F01 = 14 (RS-485) Range -32768 ~ 32767 8-74 (PDF 724), 8-41 (PDF 691), 8-87 (PDF 737) | |
| 5005h | 20485 (0x5005) | HR | S05 frequency reference (0.01 Hz) | U32 ABCD | ×0.01 Hz | R/W | 03·10 | Two words, 5005h (high) and 5006h (low) 8-74 (PDF 724), 8-87 (PDF 737) |
| 5007h | 20487 (0x5007) | HR | S06 operation command | U16 | R/W | 03·06·10 | Data format [14]. Example: FWD + DI1 = 0005h. With F02 = 4 (RS-485) b0 FWD forward · b1 REV reverse · b2 DI1 · b3 DI2 · b4 DI3 · b5 DI4 · b6 DI5 · b13 DI6 · b14 DI7 · b15 RST alarm reset 8-74 (PDF 724), 8-39 (PDF 689), 8-87 (PDF 737) | |
| 1215h | 4629 (0x1215) | HR | C99 frequency reference / multi-step frequency 0 | U32 ABCD | ×0.01 Hz | R/W | 03·10 | 1215h (high), 1216h (low). The manual FC06 example writes 1388h (50.00 Hz) to the low word 1216h: 01 06 12 16 13 88 60 20 8-56 (PDF 706), 8-14 (PDF 664)~8-15 |
| 08FFh | 2303 (0x08FF) | HR | Enter command (save to EEPROM) | U16 | W | 06 | The manual gives register number 0900h; the frame address is 08FFh (number − 1). Example: 08 06 08 FF 00 01 7A C3. Values written with 06/10/17h are not stored in EEPROM and revert at power-off 1 = Store set values in EEPROM (returns to 0) 8-21 (PDF 671) | |
| 3001h | 12289 (0x3001) | HR | F01 1st frequency reference selection | U16 | R/W | 03·06·10 | Default 0. Set 14 to give the frequency over communication Range 0 ~ 15 14 = RS-485 communication 8-47 (PDF 697), 8-5 (PDF 655) | |
| 1201h | 4609 (0x1201) | HR | F02 1st RUN command selection | U16 | R/W | 03·06·10 | Default 2. Set 4 to run over communication 4 = RS-485 communication 8-47 (PDF 697), 8-5 (PDF 655) | |
| 3003h | 12291 (0x3003) | HR | F03 1st maximum output frequency | U16 | ×0.1 Hz | R/W | 03·06·10 | Data format [3] (0.1). Example: 70.0 Hz = 02BCh Range 5 ~ 590 Hz 8-47 (PDF 697), 8-37 (PDF 687) |
| 1102h | 4354 (0x1102) | HR | F07 1st acceleration time 1 | U32 ABCD | ×0.01 s | R/W | 03·10 | Two words 1102h/1103h (0.01 s). Example: 10.00 s = 0000 03E8h — 01 10 11 02 00 02 04 00 00 03 E8 B2 98. Single-word access uses floating format [12] 8-47 (PDF 697), 8-18 (PDF 668) |
| 1104h | 4356 (0x1104) | HR | F08 1st deceleration time 1 | U32 ABCD | ×0.01 s | R/W | 03·10 | Two words 1104h/1105h (0.01 s) 8-47 (PDF 697) |
| 420Bh | 16907 (0x420B) | HR | y11 RS-485 station number | U16 | R/W | 03·06·10 | Default 1 Range 1 ~ 255 8-74 (PDF 724), 8-6 (PDF 656) | |
| 420Ch | 16908 (0x420C) | HR | y12 operation on communication error | U16 | R/W | 03·06·10 | Default 0. Acts when communication stops for longer than y18 (timeout) 0 = Trip immediately (ErP) · 1 = Trip after running for timer y13 · 2 = Retry for timer y13, trip if not restored · 3 = Continue to run · 11 = Trip after deceleration stop · 13 = Free-run stop (no trip) · 14 = Deceleration stop (no trip) 8-74 (PDF 724), 8-5 (PDF 655)~8-6 | |
| 420Eh | 16910 (0x420E) | HR | y14 RS-485 baud rate | U16 | R/W | 03·06·10 | Default 2 (9600 bps) 0 = 2400 bps · 1 = 4800 bps · 2 = 9600 bps · 3 = 19200 bps · 4 = 38400 bps · 5 = 57600 bps · 6 = 76800 bps · 7 = 115200 bps 8-74 (PDF 724), 8-6 (PDF 656) | |
| 4210h | 16912 (0x4210) | HR | y16 RS-485 parity | U16 | R/W | 03·06·10 | Default 3 0 = None (2 stop bits) · 1 = Even (1 stop bit) · 2 = Odd (1 stop bit) · 3 = None (1 stop bit) 8-74 (PDF 724), 8-6 (PDF 656) | |
| 50C1h | 20673 (0x50C1) | HR | M01 final frequency reference (±20000 = max frequency) | S16 | R | 03 | 8-75 (PDF 725), 4-2 (PDF 168) | |
| 50C5h | 20677 (0x50C5) | HR | M05 final frequency reference | U32 ABCD | ×0.01 Hz | R | 03 | 50C5h/50C6h 8-75 (PDF 725), 4-2 (PDF 168) |
| 50C8h | 20680 (0x50C8) | HR | M07 torque value | S16 | ×0.01 % | R | 03 | 8-75 (PDF 725), 4-3 (PDF 169) |
| 50CAh | 20682 (0x50CA) | HR | M09 output frequency without slip compensation | U32 ABCD | ×0.01 Hz | R | 03 | 50CAh/50CBh 8-75 (PDF 725), 4-3 (PDF 169) |
| 50CCh | 20684 (0x50CC) | HR | M10 input power | U16 | ×0.01 % | R | 03 | 8-75 (PDF 725), 4-3 (PDF 169) |
| 50CDh | 20685 (0x50CD) | HR | M11 output current (%) | U16 | ×0.01 % | R | 03 | 8-75 (PDF 725), 4-3 (PDF 169) |
| 50CEh | 20686 (0x50CE) | HR | M12 output voltage | U16 | ×0.1 V | R | 03 | 8-75 (PDF 725), 4-3 (PDF 169) |
| 50CFh | 20687 (0x50CF) | HR | M13 final operation command | U16 | R | 03 | b0 FWD forward · b1 REV reverse · b2 DI1 · b3 DI2 · b4 DI3 · b5 DI4 · b6 DI5 · b13 DI6 · b14 DI7 · b15 RST alarm reset 8-75 (PDF 725), 4-3 (PDF 169) | |
| 50D0h | 20688 (0x50D0) | HR | M14 operation status 1 | U16 | R | 03 | Data format [16]. Example: forward + accelerating = 0201h (second word of the FC03 reply example) b0 FWD during forward run · b1 REV during reverse run · b2 EXT DC braking / pre-exciting · b3 INT inverter shut down · b4 BRK braking · b5 NUV DC voltage established (0 = undervoltage) · b6 TL torque limiting · b7 VL voltage limiting · b8 IL current limiting · b9 ACC accelerating · b10 DEC decelerating · b11 ALM alarm relay · b12 RL communications effective · b15 BUSY writing parameter data 8-75 (PDF 725), 8-39 (PDF 689)~8-40 | |
| 50D1h | 20689 (0x50D1) | HR | M15 output terminals | U16 | R | 03 | b0 DO1 · b1 DO2 · b8 RO relay 8-75 (PDF 725), 4-4 (PDF 170) | |
| 0011h | 17 (0x0011) | HR | M16 latest alarm | U16 | R | 03 | Data format [10] alarm code (partial list; full list on 8-37 to 8-38). The FC03 example reads 10 words from 0011h and gets 0001h (OC1) 0 = No alarm · 1 = OC1 overcurrent (accel) · 2 = OC2 overcurrent (decel) · 3 = OC3 overcurrent (constant speed) · 6 = OU1 overvoltage (accel) · 7 = OU2 overvoltage (decel) · 8 = OU3 overvoltage (constant speed) · 10 = LU undervoltage · 11 = Lin input phase loss · 17 = OH1 heat sink overheat · 18 = OH2 external trip · 23 = OL1 motor 1 overload · 25 = OLU inverter overload · 46 = OPL output phase loss · 53 = ErP RS-485 communication error 8-75 (PDF 725), 8-37 (PDF 687)~8-38, 8-12 (PDF 662)~8-13 | |
| 001Bh | 27 (0x001B) | HR | M17 last alarm | U16 | R | 03 | 0 = No alarm · 1 = OC1 overcurrent (accel) · 2 = OC2 overcurrent (decel) · 3 = OC3 overcurrent (constant speed) · 6 = OU1 overvoltage (accel) · 7 = OU2 overvoltage (decel) · 8 = OU3 overvoltage (constant speed) · 10 = LU undervoltage · 11 = Lin input phase loss · 17 = OH1 heat sink overheat · 18 = OH2 external trip · 23 = OL1 motor 1 overload · 25 = OLU inverter overload · 46 = OPL output phase loss · 53 = ErP RS-485 communication error 8-75 (PDF 725) | |
| 0025h | 37 (0x0025) | HR | M18 second last alarm | U16 | R | 03 | 0 = No alarm · 1 = OC1 overcurrent (accel) · 2 = OC2 overcurrent (decel) · 3 = OC3 overcurrent (constant speed) · 6 = OU1 overvoltage (accel) · 7 = OU2 overvoltage (decel) · 8 = OU3 overvoltage (constant speed) · 10 = LU undervoltage · 11 = Lin input phase loss · 17 = OH1 heat sink overheat · 18 = OH2 external trip · 23 = OL1 motor 1 overload · 25 = OLU inverter overload · 46 = OPL output phase loss · 53 = ErP RS-485 communication error 8-75 (PDF 725) | |
| 002Fh | 47 (0x002F) | HR | M19 third last alarm | U16 | R | 03 | 0 = No alarm · 1 = OC1 overcurrent (accel) · 2 = OC2 overcurrent (decel) · 3 = OC3 overcurrent (constant speed) · 6 = OU1 overvoltage (accel) · 7 = OU2 overvoltage (decel) · 8 = OU3 overvoltage (constant speed) · 10 = LU undervoltage · 11 = Lin input phase loss · 17 = OH1 heat sink overheat · 18 = OH2 external trip · 23 = OL1 motor 1 overload · 25 = OLU inverter overload · 46 = OPL output phase loss · 53 = ErP RS-485 communication error 8-75 (PDF 725) | |
| 50D6h | 20694 (0x50D6) | HR | M20 cumulative operation time | U32 ABCD | h | R | 03 | 8-75 (PDF 725), 4-12 (PDF 178) |
| 50D8h | 20696 (0x50D8) | HR | M21 main circuit DC voltage | U16 | V | R | 03 | 8-75 (PDF 725), 4-12 (PDF 178) |
| 5102h | 20738 (0x5102) | HR | M61 inverter internal air temperature | S16 | ×0.1 ℃ | R | 03 | 8-77 (PDF 727), 4-17 (PDF 183) |
| 1018h | 4120 (0x1018) | HR | M62 fin temperature | S16 | ×0.1 ℃ | R | 03 | 8-77 (PDF 727), 4-17 (PDF 183) |
| 510Ah | 20746 (0x510A) | HR | M69 inverter rated current | U16 | ×0.01 A | R | 03 | 8-77 (PDF 727), 4-18 (PDF 184) |
| 1003h | 4099 (0x1003) | HR | W01 running status 1 | U16 | R | 03 | b0 FWD during forward run · b1 REV during reverse run · b2 EXT DC braking / pre-exciting · b3 INT inverter shut down · b4 BRK braking · b5 NUV DC voltage established (0 = undervoltage) · b6 TL torque limiting · b7 VL voltage limiting · b8 IL current limiting · b9 ACC accelerating · b10 DEC decelerating · b11 ALM alarm relay · b12 RL communications effective · b15 BUSY writing parameter data 8-77 (PDF 727), 4-30 (PDF 196) | |
| 5242h | 21058 (0x5242) | HR | W02 frequency reference monitor | U32 ABCD | ×0.01 Hz | R | 03 | 5242h/5243h 8-77 (PDF 727), 4-30 (PDF 196) |
| 5244h | 21060 (0x5244) | HR | W03 output frequency before slip compensation | U32 ABCD | ×0.01 Hz | R | 03 | 5244h/5245h. The FC17 example reads 2 words from 5244h and gets 0000 1388h (50.00 Hz) 8-78 (PDF 728), 8-19 (PDF 669) |
| 5246h | 21062 (0x5246) | HR | W04 output frequency after slip compensation | U32 ABCD | ×0.01 Hz | R | 03 | 8-78 (PDF 728), 4-30 (PDF 196) |
| 1002h | 4098 (0x1002) | HR | W05 output current | U16 | ×0.01 A | R | 03 | 8-78 (PDF 728), 4-30 (PDF 196) |
| 1010h | 4112 (0x1010) | HR | W06 output voltage | U16 | ×0.1 V | R | 03 | 8-78 (PDF 728), 4-30 (PDF 196) |
| 100Fh | 4111 (0x100F) | HR | W07 output torque | S16 | % | R | 03 | Range -999 ~ 999 % 8-78 (PDF 728), 4-31 (PDF 197) |
| 1006h | 4102 (0x1006) | HR | W40 input terminals | U16 | R | 03 | Data format [43]. Example: 0061h = DI4, DI5, DI6 ON b0 DI6 · b1 DI7 · b2 DI1 · b3 DI2 · b4 DI3 · b5 DI4 · b6 DI5 · b11 EN1 · b12 EN2 8-78 (PDF 728), 8-43 (PDF 693) | |
| 1007h | 4103 (0x1007) | HR | W41 output signals | U16 | R | 03 | b0 DO1 · b1 DO2 · b8 RO relay 8-78 (PDF 728) | |
| 1014h | 4116 (0x1014) | HR | W179 total RUN time | U32 ABCD | h | R | 03 | 8-81 (PDF 731), 4-40 (PDF 206) |
Notes
- Two-word values put the high word at the lower address (big endian). Writing only the low word changes only the low word; writing only the high word gives exception 02 (8-25). Changing H396 (endian selection) changes the order.
- Values written over communication are not saved to EEPROM (y97 default 1). To keep them, write 1 to the Enter command (register number 0900h = address 08FFh) (8-21).
- Left out: items on pages where the name and format columns are shifted (8-48, 8-56, 8-74, 8-78, 8-80) that could not be matched by an example or the chapter 4 list; W71 (DC voltage in the data list but «do not use» in the chapter 4 monitor list); y18 and y19 (format column not certain). Page numbers are printed pages (chapter 8 PDF = 650 + page, chapter 4 PDF = 166 + page).
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
- omron/3g3m1.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
- M1 Series Standard Type User's Manual — OMRON Corporation, Cat. No. I669-E1-03 · monitor lists 4-2 to 4-40 (PDF 168-206), communications 8-3 to 8-22 (PDF 653-672), data lists 8-34 to 8-86 (PDF 684-736), commands via communication 8-87 (PDF 737) · checked 2026-10-29