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 |
|---|---|
| Data · parity · stop | 8 · — · — |
| Max per request | 50 registers |
| Manual address style | Wire address as is (0-based) |
- Addressing: the manual's CRC example (pp.3-22-3-23) reads 20 words from function code P02 (group P = 03h, number 02h) at station 1 with 01 03 03 02 00 14 E4 41. Wire address = group code × 256 + number (0-based, Table 3.2 p.3-5). The CRC matches calculation. The manual also writes «40000 + group × 256 + number» (J60 = 43388); unlike the usual PLC notation where 40001 is the first address, the value minus 40000 is the wire address (p.3-4).
- y04 baud 2400/4800/9600/19200/38400 bps; y06 parity 0 none (2 stop bits), 1 even, 2 odd, 3 none (1 stop bit); Modbus RTU is fixed at 8 bits (p.2-21). Set y10 (port 1) or y20 (port 2) = 0 for Modbus RTU (p.2-22). Factory settings are not in this manual and are left empty.
- FC03 reads up to 50 words at a time. Unused function codes read as 0 without an error, and one read does not cross a group (p.3-5).
Registers (55)
«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.
55
Swipe the table sideways — the first column (manual address) stays put.
| Manual | Wire | Table | Name | Type | Unit · scale | R/W | FC | Details |
|---|---|---|---|---|---|---|---|---|
| S01 (0701h) | 1793 (0x0701) | HR | S01 Frequency reference (p.u.) | S16 | R/W | 03·06·10 | ±20000 = maximum frequency. When S01 is not 0 it takes precedence over S05 p.5-2 Table 5.2 | |
| S05 (0705h) | 1797 (0x0705) | HR | S05 Frequency reference | U16 | ×0.01 Hz | R/W | 03·06·10 | Range 0 ~ 655.35 Hz p.5-2 Table 5.2 |
| S06 (0706h) | 1798 (0x0706) | HR | S06 Operation command | U16 | R/W | 03·06·10 | Format [14]. Manual example: FWD and X1 on = 0005h. To reset an alarm with bit 15, write 1 and then 0 again b0 FWD forward run command · b1 REV reverse run command · b2 X1 general-purpose input · b3 X2 general-purpose input · b4 X3 general-purpose input · b5 X4 general-purpose input · b6 X5 general-purpose input · b7 X6 general-purpose input · b8 X7 general-purpose input · b13 XF (FWD) general-purpose input · b14 XR (REV) general-purpose input · b15 RST alarm reset p.5-2 Table 5.2, p.5-67 | |
| S07 (0707h) | 1799 (0x0707) | HR | S07 Universal DO | U16 | R/W | 03·06·10 | Format [15]: drives output terminals assigned to universal DO b0 Y1 general-purpose output · b1 Y2 general-purpose output · b2 Y3 general-purpose output · b3 Y4 general-purpose output · b4 Y5 general-purpose output · b8 30 alarm output (general-purpose output) p.5-2 Table 5.2, p.5-67 | |
| S08 (0708h) | 1800 (0x0708) | HR | S08 Acceleration time (F07) | U16 | ×0.1 s | R/W | 03·06·10 | Range 0 ~ 3600 s p.5-2 Table 5.2 |
| S09 (0709h) | 1801 (0x0709) | HR | S09 Deceleration time (F08) | U16 | ×0.1 s | R/W | 03·06·10 | Range 0 ~ 3600 s p.5-2 Table 5.2 |
| S12 (070Ch) | 1804 (0x070C) | HR | S12 Universal AO | S16 | R/W | 03·06·10 | ±20000 = full scale p.5-2 Table 5.2 | |
| S13 (070Dh) | 1805 (0x070D) | HR | S13 PID command | S16 | R/W | 03·06·10 | ±20000 = ±100% p.5-2 Table 5.2 | |
| S14 (070Eh) | 1806 (0x070E) | HR | S14 Alarm reset command | U16 | R/W | 03·06·10 | Writing 1 resets the alarm. Always reads 0 0 = None · 1 = Alarm reset p.5-2 Table 5.2, p.5-5 | |
| S19 (0713h) | 1811 (0x0713) | HR | S19 Speed command | S16 | r/min | R/W | 03·06·10 | p.5-2 Table 5.2 |
| M01 (0801h) | 2049 (0x0801) | HR | M01 Frequency reference (p.u.) (final command) | S16 | R | 03 | ±20000 = maximum frequency p.5-11 Table 5.8 | |
| M05 (0805h) | 2053 (0x0805) | HR | M05 Frequency reference (final command) | U16 | ×0.01 Hz | R | 03 | p.5-11 Table 5.8 |
| M06 (0806h) | 2054 (0x0806) | HR | M06 Output frequency 1 (p.u.) | S16 | R | 03 | ±20000 = maximum frequency, before slip compensation p.5-11 Table 5.8 | |
| M07 (0807h) | 2055 (0x0807) | HR | M07 Torque real value | S16 | ×0.01 % | R | 03 | 100% = motor rated torque p.5-11 Table 5.8 |
| M09 (0809h) | 2057 (0x0809) | HR | M09 Output frequency | U16 | ×0.01 Hz | R | 03 | Modbus RTU uses format [22] (0.00-655.35 Hz, unsigned) p.5-11 Table 5.8 |
| M10 (080Ah) | 2058 (0x080A) | HR | M10 Input power | U16 | ×0.01 % | R | 03 | 100% = nominal applicable motor output p.5-11 Table 5.8 |
| M11 (080Bh) | 2059 (0x080B) | HR | M11 Output current effective value | U16 | ×0.01 % | R | 03 | 100% = inverter rated current p.5-11 Table 5.8 |
| M12 (080Ch) | 2060 (0x080C) | HR | M12 Output voltage effective value | U16 | ×0.1 V | R | 03 | Format [3] (0.1 units) but there is no fractional part (changes in 1.0 V steps) p.5-11 Table 5.8 |
| M13 (080Dh) | 2061 (0x080D) | HR | M13 Operation command (final command) | U16 | R | 03 | Format [14]: final command from keypad, terminals and communications b0 FWD forward run command · b1 REV reverse run command · b2 X1 general-purpose input · b3 X2 general-purpose input · b4 X3 general-purpose input · b5 X4 general-purpose input · b6 X5 general-purpose input · b7 X6 general-purpose input · b8 X7 general-purpose input · b13 XF (FWD) general-purpose input · b14 XR (REV) general-purpose input · b15 RST alarm reset p.5-12 Table 5.9, p.5-67 | |
| M14 (080Eh) | 2062 (0x080E) | HR | M14 Operation status | U16 | R | 03 | Format [16] b0 FWD running forward · b1 REV running in reverse · b2 EXT DC braking (or pre-exciting) · b3 INT inverter shut down · b4 BRK braking · b5 NUV DC link voltage established (0 = undervoltage) · b7 VL voltage limiting · b8 IL current limiting · b9 ACC accelerating · b10 DEC decelerating · b11 ALM alarm relay (any fault) · b12 RL communications effective · b15 BUSY writing function code data p.5-12 Table 5.9, p.5-67 | |
| M15 (080Fh) | 2063 (0x080F) | HR | M15 General-purpose output terminal information | U16 | R | 03 | Format [15] b0 Y1 general-purpose output · b1 Y2 general-purpose output · b2 Y3 general-purpose output · b3 Y4 general-purpose output · b4 Y5 general-purpose output · b8 30 alarm output (general-purpose output) p.5-12 Table 5.9, p.5-67 | |
| M16 (0810h) | 2064 (0x0810) | HR | M16 Latest alarm contents | U16 | R | 03 | Alarm code (format [10], p.5-65) p.5-12 Table 5.9 | |
| M17 (0811h) | 2065 (0x0811) | HR | M17 Last alarm contents | U16 | R | 03 | Alarm code (format [10], p.5-65) p.5-12 Table 5.9 | |
| M18 (0812h) | 2066 (0x0812) | HR | M18 Second last alarm contents | U16 | R | 03 | Alarm code (format [10], p.5-65) p.5-12 Table 5.9 | |
| M19 (0813h) | 2067 (0x0813) | HR | M19 Third last alarm contents | U16 | R | 03 | Alarm code (format [10], p.5-65) p.5-12 Table 5.9 | |
| M20 (0814h) | 2068 (0x0814) | HR | M20 Cumulative operation time | U16 | h | R | 03 | p.5-12 Table 5.9 |
| M21 (0815h) | 2069 (0x0815) | HR | M21 DC link circuit voltage | U16 | V | R | 03 | p.5-12 Table 5.9 |
| M23 (0817h) | 2071 (0x0817) | HR | M23 Model code | U16 | R | 03 | Series, generation, model and voltage series as four hex digits (format [17]) p.5-12 Table 5.9 | |
| M24 (0818h) | 2072 (0x0818) | HR | M24 Capacity code | U16 | R | 03 | Format [11] p.5-12 Table 5.9 | |
| M25 (0819h) | 2073 (0x0819) | HR | M25 ROM version | U16 | R | 03 | p.5-12 Table 5.9 | |
| M26 (081Ah) | 2074 (0x081A) | HR | M26 Transmission error transaction code | U16 | R | 03 | RS-485 communications error code (format [20]) p.5-12 Table 5.9 | |
| M27 (081Bh) | 2075 (0x081B) | HR | M27 Frequency reference on alarm (p.u.) | S16 | R | 03 | ±20000 = maximum frequency p.5-12 Table 5.9 | |
| M31 (081Fh) | 2079 (0x081F) | HR | M31 Frequency reference on alarm | U16 | ×0.01 Hz | R | 03 | p.5-13 Table 5.10 |
| M32 (0820h) | 2080 (0x0820) | HR | M32 Output frequency 1 on alarm (p.u.) | S16 | R | 03 | ±20000 = maximum frequency p.5-13 Table 5.10 | |
| M33 (0821h) | 2081 (0x0821) | HR | M33 Torque real value on alarm | S16 | ×0.01 % | R | 03 | p.5-13 Table 5.10 |
| M35 (0823h) | 2083 (0x0823) | HR | M35 Output frequency on alarm | U16 | ×0.01 Hz | R | 03 | p.5-13 Table 5.10 |
| M36 (0824h) | 2084 (0x0824) | HR | M36 Input power on alarm | U16 | ×0.01 % | R | 03 | p.5-13 Table 5.10 |
| M37 (0825h) | 2085 (0x0825) | HR | M37 Output current effective value on alarm | U16 | ×0.01 % | R | 03 | p.5-13 Table 5.10 |
| M39 (0827h) | 2087 (0x0827) | HR | M39 Operation command on alarm | U16 | R | 03 | b0 FWD forward run command · b1 REV reverse run command · b2 X1 general-purpose input · b3 X2 general-purpose input · b4 X3 general-purpose input · b5 X4 general-purpose input · b6 X5 general-purpose input · b7 X6 general-purpose input · b8 X7 general-purpose input · b13 XF (FWD) general-purpose input · b14 XR (REV) general-purpose input · b15 RST alarm reset p.5-13 Table 5.10, p.5-67 | |
| M40 (0828h) | 2088 (0x0828) | HR | M40 Operation status on alarm | U16 | R | 03 | b0 FWD running forward · b1 REV running in reverse · b2 EXT DC braking (or pre-exciting) · b3 INT inverter shut down · b4 BRK braking · b5 NUV DC link voltage established (0 = undervoltage) · b7 VL voltage limiting · b8 IL current limiting · b9 ACC accelerating · b10 DEC decelerating · b11 ALM alarm relay (any fault) · b12 RL communications effective · b15 BUSY writing function code data p.5-13 Table 5.10, p.5-67 | |
| M41 (0829h) | 2089 (0x0829) | HR | M41 Output terminal information on alarm | U16 | R | 03 | b0 Y1 general-purpose output · b1 Y2 general-purpose output · b2 Y3 general-purpose output · b3 Y4 general-purpose output · b4 Y5 general-purpose output · b8 30 alarm output (general-purpose output) p.5-13 Table 5.10, p.5-67 | |
| M42 (082Ah) | 2090 (0x082A) | HR | M42 Cumulative operation time on alarm | U16 | h | R | 03 | p.5-13 Table 5.10 |
| M43 (082Bh) | 2091 (0x082B) | HR | M43 DC link circuit voltage on alarm | U16 | V | R | 03 | p.5-13 Table 5.10 |
| M44 (082Ch) | 2092 (0x082C) | HR | M44 Inverter internal air temperature on alarm | U16 | ℃ | R | 03 | p.5-13 Table 5.10 |
| M45 (082Dh) | 2093 (0x082D) | HR | M45 Heat sink temperature on alarm | U16 | ℃ | R | 03 | p.5-13 Table 5.10 |
| M46 (082Eh) | 2094 (0x082E) | HR | M46 Life of main circuit capacitor | U16 | ×0.1 % | R | 03 | 100% = capacity at shipment p.5-13 Table 5.10 |
| M49 (0831h) | 2097 (0x0831) | HR | M49 Input terminal [12] voltage (p.u.) | S16 | R | 03 | -20000 = -10 V, 20000 = 10 V p.5-14 Table 5.11 | |
| M50 (0832h) | 2098 (0x0832) | HR | M50 Input terminal [C1] current (p.u.) | U16 | R | 03 | 0 = 0 mA, 20000 = 20 mA p.5-14 Table 5.11 | |
| M52 (0834h) | 2100 (0x0834) | HR | M52 Input terminal [32] voltage (p.u.) | S16 | R | 03 | -20000 = -10 V, 20000 = 10 V p.5-14 Table 5.11 | |
| M54 (0836h) | 2102 (0x0836) | HR | M54 Input terminal [V2] voltage (p.u.) | S16 | R | 03 | -20000 = -10 V, 20000 = 10 V p.5-14 Table 5.11 | |
| M61 (083Dh) | 2109 (0x083D) | HR | M61 Inverter internal air temperature | U16 | ℃ | R | 03 | p.5-14 Table 5.11 |
| M62 (083Eh) | 2110 (0x083E) | HR | M62 Heat sink temperature | U16 | ℃ | R | 03 | p.5-14 Table 5.11 |
| M63 (083Fh) | 2111 (0x083F) | HR | M63 Load factor | S16 | ×0.01 % | R | 03 | 100% = motor rating p.5-14 Table 5.11 |
| M64 (0840h) | 2112 (0x0840) | HR | M64 Motor output | S16 | ×0.01 % | R | 03 | 100% = motor rated output (kW) p.5-14 Table 5.11 |
| M68 (0844h) | 2116 (0x0844) | HR | M68 PID final command | S16 | R | 03 | ±20000 = ±100% p.5-14 Table 5.11 |
Notes
- Only S and M codes supported by both HVAC and AQUA whose meaning and unit are in the manual tables are included. M38 is left out (step 1.0 vs format [3] = 0.1), M47/M48 (life) because Table 5.10 (10 h) could not be matched with format [74], M69 (rated current) because its scale changes with capacity, and M53 because Table 5.11 calls it input terminal [C2] current while format Table 5.28 says voltage.
- Bit 6 of format [16] (operation status) is 0 (unused) in the bit diagram but TL (torque limiting) in the table below it, so it is left out (p.5-67).
- To run the drive and give the frequency reference over communications, set H30 (link function) and y98/y99 to communications (pp.2-17-2-19). Reading (M codes) works as is.
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
- fuji-electric/frenic-hvac.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
- RS-485 Communication User's Manual (FRENIC-HVAC, FRENIC-AQUA) — Fuji Electric, 24A7-E-0021b 3rd edition May 2015 · RS-485 settings pp.2-20-2-22, Modbus RTU messages pp.3-4-3-5, CRC example pp.3-22-3-23, command data p.5-2, monitor data pp.5-11-5-14, format numbers pp.5-51-5-52, format specifications pp.5-63-5-71 · checked 2026-10-24