LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) Modbus register map

Updated 25 October 2026

Short answer

LS Electric's general-purpose variable frequency drive with a built-in RS-485 port that speaks Modbus RTU or the LS INV 485 protocol. Monitoring sits in the S100 common area at 0h0300-0h037F, run/stop and frequency commands at 0h0380-0h03DF, and every keypad parameter has its own address per group (dr = 0h1100, CM = 0h1700, Pr = 0h1B00). This map covers the S100 common area, the trip/warning bit words, and the parameters needed to put the drive under Modbus control.

This page lists 48 Modbus registers for the LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) — 21 writable — with the table, 0-based wire address, data type, word order, scale, units and access of each, re-typed from LS Electric’s own free documentation (linked below) and checked against it.

Manufacturer: LS Electric
Model: LSLV-S100 AC drive (built-in RS-485 Modbus RTU)
Equipment type: Variable frequency drive
Registers: 48 (21 writable)
Transport: Modbus RTU
Default unit ID: 1
Default serial: 9600 baud, 8N1
Documented addressing: 1-based (subtract 1 for the wire address)
Also known as: LSLV-S100, LSIS S100, LS S100, LSLV0075S100-4EOFNS
Source document: S100 User Manual (LSLV-S100 AC Variable Speed Drive) · S100_Manual_English_V4.3 · rev. 2026-09

Download CSV all columns JSON Manufacturer PDF ↗

Integration notes: LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU)

Integration in brief

Set CM.01-CM.04 to match the master, set dr.06 = 3 (Int 485) and dr.07 = 6 (Int 485), then write 0h0380 (frequency, 0.01 Hz) and 0h0382 (0003h forward, 0001h reverse, 0000h stop). Poll 0h0305, 0h0310, 0h0311, 0h0315 and the trip words 0h0330-0h0334. Remember every printed address is sent minus 1.

Minimum registers to map

Addresses are 0-based wire addresses. Enough to monitor and run the unit; map more as the job needs.

Register	Name	Type	Why	Access
HR 897	Operation command	BITMAP16	0h0382 operation command (run/stop/direction/reset)	Read/write
HR 895	Frequency command	UINT16	0h0380 frequency command, 0.01 Hz	Read/write
HR 772	Inverter operation state	BITMAP16	0h0305 operation state (ready/warning/fault, accel/decel, direction)	Read
HR 784	Output frequency	UINT16	0h0311 output frequency	Read
HR 783	Output current	UINT16	0h0310 output current	Read
HR 788	DC link voltage	UINT16	0h0315 DC link voltage	Read
HR 815	Latch type trip information 1	BITMAP16	0h0330 latch trip flags	Read
HR 819	Warning information	BITMAP16	0h0334 warning flags	Read

Enable Modbus control & writes

CM.01 station ID (1-250, default 1), CM.02 = 0 Modbus-RTU (default), CM.03 baud (default 3 = 9600), CM.04 frame (default 0 = 8N1), CM.05 response delay (default 5 ms). For control set dr.06 Cmd Source = 3 (Int 485) and dr.07 Freq Ref Src = 6 (Int 485); on the 7-segment keypad these are the drv and Frq codes. Virtual inputs: assign functions in CM.70-CM.77 and set bits in 0h0385.

Communication loss & watchdog

Pr.12 Lost Cmd Mode (0 none by default, 1 free-run, 2 decelerate with Pr.07, 3 hold average input, 4 hold average output, 5 run at Pr.14) acts when communication has been lost for longer than Pr.13 Lost Cmd Time (0.1-120 s, default 1.0 s). Relay 1 can signal it with OU.31 = 13 (Lost Command); 0h0332 bit 2 and 0h0334 bit 3 flag it.

Byte order & addressing

Wire address = printed address - 1 (manual example: 0x1103 is sent as 0x1102). 0h0300 is read at 0x02FF.
Supported functions: 03, 04, 06 and 16 (0x10). Exception 06 means slave busy.
0h0382 bits 2 and 3 act on a 0 -> 1 edge: write the bit back to 0 before the next reset or free-run stop.
Values changed over communication are lost at power-off unless saved: write 0h03E0 = 0 then 1 (a 1 -> 0 change does nothing). Setting CNF.48 = 1 on the LCD keypad also saves them.
An older iG5A-compatible block also exists at 0h0000-0h001B; this map does not use it because the manual's minus-1 rule cannot reach its first address 0h0000.

Network setup

Wire RS-485 to control terminals S+, S- and SG; connect SG to the master's signal ground.
Turn the RS-485 terminating resistor on with switch SW4 on the control board (factory setting Off) at the drive at each end of the line.
Up to 16 drives per line, 1,200 m maximum (700 m recommended), shielded twisted pair 0.75 mm2.
Baud 1200-115200 bps; frames 8N1, 8N2, 8E1 or 8O1.

Watch out for

Factory dr.06 = 1 (Fx/Rx-1 terminals) and dr.07 = 0 (Keypad-1): network run and frequency commands do nothing until both are changed.
When registering control items in CM.51 onward (read/written at 0h0110+), put the frequency and run command entries last in the frame.
0h0386 digital output control only moves outputs whose OU.31/OU.33 function is None.
If every value looks shifted by one register, the master is already applying the -1 itself; read 0h0300 (inverter model) and expect 0006h.

LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) Modbus registers

Address = 0-based wire address (the documented number is shown under it when it differs) · Order: ABCD = high word first, CDAB = low word first · Scale: engineering value = raw × scale.

48 of 48 shown

LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) Modbus register map
Table	Address	Name	Description	Type	Scale	Units	Access	Values / bits
HR	767doc 0h0300	Inverter model	0006h = S100.	UINT16			Read	6 = S100
HR	768doc 0h0301	Inverter capacity	Coded, e.g. 4075h = 7.5 kW, 4160h = 22 kW.	UINT16			Read
HR	770doc 0h0303	Inverter software version	Hex coded: 0x0100 = version 1.00.	UINT16			Read
HR	772doc 0h0305	Inverter operation state	Three packed 4-bit fields.	BITMAP16			Read	bit 0 = B0-B3 field: 0 stopped, 1 forward, 2 reverse, 3 DC operating (0 speed); bit 4 = B4-B7 field: 1 speed search, 2 accel, 3 constant speed, 4 decel, 5 decel to stop, 6 H/W OCS, 7 S/W OCS, 8 dwell; bit 12 = B12-B15 field: 0 ready, 4 warning, 8 fault (per Pr.30)
HR	773doc 0h0306	Operation/frequency command source	High byte = run command source, low byte = frequency source.	BITMAP16			Read	bit 0 = B0-B7 frequency source: 0 keypad speed, 1 keypad torque, 2-4 up/down, 5 V1, 7 V2, 8 I2, 9 pulse, 10 built-in 485, 11 comm option, 12 user sequence, 13 jog, 14 PID, 25-39 multi-step; bit 8 = B8-B15 run command source: 0 keypad, 1 comm option, 2 user sequence, 3 built-in 485, 4 terminal block
HR	783doc 0h0310	Output current		UINT16	× 0.1	A	Read
HR	784doc 0h0311	Output frequency		UINT16	× 0.01	Hz	Read
HR	785doc 0h0312	Output rpm		UINT16		rpm	Read
HR	786doc 0h0313	Motor feedback speed	Signed, direction-aware.	INT16		rpm	Read
HR	787doc 0h0314	Output voltage		UINT16		V	Read
HR	788doc 0h0315	DC link voltage		UINT16		V	Read
HR	789doc 0h0316	Output power		UINT16	× 0.1	kW	Read
HR	796doc 0h031D	Hz/rpm unit select		UINT16			Read	0 = Hz; 1 = rpm
HR	799doc 0h0320	Digital input information		BITMAP16			Read	bit 0 = P1 (I/O board); bit 1 = P2 (I/O board); bit 2 = P3 (I/O board); bit 3 = P4 (I/O board); bit 4 = P5 (I/O board); bit 5 = P6 (I/O board); bit 6 = P7 (I/O board); bit 7 = P8 (extension I/O); bit 8 = P9 (extension I/O); bit 9 = P10 (extension I/O)
HR	800doc 0h0321	Digital output information		BITMAP16			Read	bit 0 = Relay 1; bit 1 = Q1; bit 2 = Relay 2 (30-75 kW); bit 3 = Relay 3 (extension I/O); bit 4 = Relay 4 (extension I/O)
HR	801doc 0h0322	Virtual digital input information	State of CM.70-CM.77 virtual inputs.	BITMAP16			Read	bit 0 = Virtual DI 1 (CM.70); bit 1 = Virtual DI 2 (CM.71); bit 2 = Virtual DI 3 (CM.72); bit 3 = Virtual DI 4 (CM.73); bit 4 = Virtual DI 5 (CM.74); bit 5 = Virtual DI 6 (CM.75); bit 6 = Virtual DI 7 (CM.76); bit 7 = Virtual DI 8 (CM.77)
HR	815doc 0h0330	Latch type trip information 1		BITMAP16			Read	bit 0 = Overload trip; bit 1 = Underload trip; bit 2 = Inverter overload trip; bit 3 = E-Thermal trip; bit 4 = Ground fault trip; bit 5 = Output open-phase trip; bit 6 = Input open-phase trip; bit 9 = NTC trip; bit 10 = Overcurrent trip; bit 11 = Overvoltage trip; bit 12 = External trip; bit 13 = Arm short; bit 14 = Over heat trip; bit 15 = Fuse open trip
HR	816doc 0h0331	Latch type trip information 2		BITMAP16			Read	bit 2 = Thermal trip; bit 3 = Fan trip; bit 5 = Error while writing parameter; bit 6 = Pre PID fail; bit 7 = Bad contact at basic I/O board; bit 8 = External brake trip; bit 9 = No motor trip; bit 10 = Bad option card; bit 12 = Safety A; bit 13 = Safety B
HR	817doc 0h0332	Level type trip information		BITMAP16			Read	bit 0 = BX; bit 1 = Low voltage; bit 2 = Lost command; bit 3 = Keypad lost command; bit 6 = Lost option command; bit 7 = BLE app lost
HR	818doc 0h0333	H/W diagnosis trip information		BITMAP16			Read	bit 0 = ADC error; bit 1 = EEPROM error; bit 2 = Watchdog-1 error; bit 3 = Watchdog-2 error; bit 5 = Queue full; bit 6 = CommUpdate error
HR	819doc 0h0334	Warning information		BITMAP16			Read	bit 0 = Overload; bit 1 = Underload; bit 2 = Inverter overload; bit 3 = Lost command; bit 4 = Fan running; bit 5 = DB; bit 6 = Wrong encoder installation; bit 7 = Encoder disconnection; bit 8 = Keypad lost; bit 9 = Auto tuning failed; bit 10 = Fan exchange; bit 11 = Fire mode; bit 15 = Comm idle state
HR	831doc 0h0340	On time days	Days powered on.	UINT16		day	Read
HR	832doc 0h0341	On time minutes	Minutes on top of the on-time days.	UINT16		min	Read
HR	833doc 0h0342	Run time days	Days the motor was driven.	UINT16		day	Read
HR	834doc 0h0343	Run time minutes	Minutes on top of the run-time days.	UINT16		min	Read
HR	835doc 0h0344	Fan time days		UINT16		day	Read
HR	836doc 0h0345	Fan time minutes		UINT16		min	Read
HR	895doc 0h0380	Frequency command	Run frequency from communication; not saved at power-off.	UINT16	× 0.01	Hz	Read/write
HR	896doc 0h0381	RPM command		UINT16		rpm	Read/write
HR	897doc 0h0382	Operation command	0003h = forward run, 0001h = reverse run, 0000h = stop.	BITMAP16			Read/write	bit 0 = 1 = run, 0 = stop; bit 1 = 1 = forward, 0 = reverse; bit 2 = 0->1: trip reset; bit 3 = 0->1: free-run stop
HR	898doc 0h0383	Acceleration time		UINT16	× 0.1	s	Read/write
HR	899doc 0h0384	Deceleration time		UINT16	× 0.1	s	Read/write
HR	900doc 0h0385	Virtual digital input control	Bits drive the functions set in CM.70-CM.77.	BITMAP16			Read/write	bit 0 = Virtual DI 1 (CM.70); bit 1 = Virtual DI 2 (CM.71); bit 2 = Virtual DI 3 (CM.72); bit 3 = Virtual DI 4 (CM.73); bit 4 = Virtual DI 5 (CM.74); bit 5 = Virtual DI 6 (CM.75); bit 6 = Virtual DI 7 (CM.76); bit 7 = Virtual DI 8 (CM.77)
HR	901doc 0h0386	Digital output control	Works only for outputs whose function is set to None.	BITMAP16			Read/write	bit 0 = Relay 1 (OU.31 = None); bit 1 = Q1 (OU.33 = None); bit 2 = Relay 2, 30-75 kW; bit 3 = Relay 3, extension I/O; bit 4 = Relay 4, extension I/O
HR	905doc 0h038A	Motor rated current		UINT16	× 0.1	A	Read/write
HR	906doc 0h038B	Motor rated voltage		UINT16		V	Read/write
HR	991doc 0h03E0	Save parameters	Write 0 then 1 to store parameters changed by communication.	UINT16			Read/write	0 = No; 1 = Yes
HR	993doc 0h03E2	Parameter initialization	Not allowed while tripped or running.	UINT16			Read/write	0 = No; 1 = All groups; 2 = dr group; 3 = bA group; 4 = Ad group; 5 = Cn group; 6 = In group; 7 = OU group; 8 = CM group; 9 = AP group; 12 = Pr group; 13 = M2 group
HR	4354doc 0h1103	dr.03 Acceleration time	0.0-600.0 s, default 20.0 s (manual example: 50 = 5.0 s).	UINT16	× 0.1	s	Read/write
HR	4355doc 0h1104	dr.04 Deceleration time	0.0-600.0 s, default 30.0 s (manual example: 100 = 10.0 s).	UINT16	× 0.1	s	Read/write
HR	4357doc 0h1106	dr.06 Command source	Set 3 to run from built-in RS-485; default 1.	UINT16			Read/write	0 = Keypad; 1 = Fx/Rx-1; 2 = Fx/Rx-2; 3 = Int 485; 4 = Field Bus; 5 = UserSeqLink
HR	4358doc 0h1107	dr.07 Frequency reference source	Set 6 for frequency from built-in RS-485; default 0.	UINT16			Read/write	0 = Keypad-1; 1 = Keypad-2; 2 = V1; 4 = V2; 5 = I2; 6 = Int 485; 8 = Field Bus; 9 = UserSeqLink; 12 = Pulse
HR	5888doc 0h1701	CM.01 Int485 station ID	1-250, default 1.	UINT16			Read/write
HR	5889doc 0h1702	CM.02 Int485 protocol	Default 0.	UINT16			Read/write	0 = Modbus-RTU; 2 = LS INV 485
HR	5890doc 0h1703	CM.03 Int485 baud rate	Default 3 (9600).	UINT16			Read/write	0 = 1200 bps; 1 = 2400 bps; 2 = 4800 bps; 3 = 9600 bps; 4 = 19200 bps; 5 = 38400 bps; 6 = 56000 bps; 7 = 115200 bps
HR	5891doc 0h1704	CM.04 Int485 frame	Default 0 (8N1).	UINT16			Read/write	0 = D8/PN/S1; 1 = D8/PN/S2; 2 = D8/PE/S1; 3 = D8/PO/S1
HR	5892doc 0h1705	CM.05 Response delay	Delay before the drive answers, 0-1000 ms; default 5.	UINT16		ms	Read/write
HR	6923doc 0h1B0C	Pr.12 Lost command mode	Action on speed-command loss; default 0.	UINT16			Read/write	0 = None; 1 = Free-run; 2 = Dec (Pr.07 time); 3 = Hold input; 4 = Hold output; 5 = Lost preset (Pr.14)

Notes on this map

Direct PDF from LS Electric's Solution Square CDN: https://sftpssqblobcdn.blob.core.windows.net/prod/largefile/document/17912520084750/S100_Manual_English_V4.3.pdf (V4.3, listed on the document page with update date 2026-10-06).
Left out because the sign is not stated and the values can go negative: 0h0317 output torque, 0h0318/0h0319 and 0h0388/0h0389 PID reference/feedback, 0h0390-0h0395 torque reference/limits/bias, 0h0324-0h032B analog inputs and outputs (V1 can be bipolar), and 0h032D module temperature.
Left out: 0h032E/0h032F energy (0.1 kWh and MWh registers; how they combine is not described) and the parameter-group registers other than those needed for setup.
0h0305 and 0h0306 hold packed 4-bit and 8-bit fields rather than single flags; the 'bits' entries name the lowest bit of each field.
Pr.13 Lost Cmd Time (0h1B0D, 0.1-120 s) is not included because its register scaling is not printed; set it on the keypad.
The frequency command registers (0h0005, 0h0380) are never stored, even with parameter save; to keep a frequency through a power cycle set dr.07 = 1 (Keypad-1), write dr.01 at 0h1101 and save with 0h03E0.
The iS5/iP5A/iV5/iG5A-compatible area (0h0000-0h001B: command frequency 0h0005, operation command 0h0006, status 0h000E and so on) is left out: the manual starts that area at 0h0000, which cannot exist under the minus-1 rule shown in its only example frame, so the offset for that legacy area is not settled by the manual. Use the S100 area at 0h0300+ instead.
The manual prints a scale of '0' for 0h0312 output rpm, 0h0313 feedback speed and the 0h0340-0h0345 time counters; this map reads that as zero decimal places (whole rpm, days, minutes).
CM.04 option 1 (D8/PN/S2, two stop bits) appears in the chapter 7 parameter description but not in the CM group function table.

Check it against the live device. A register map tells you what the controller can expose; the unit in front of you may differ by firmware or options. Read a few registers and compare them with the unit’s own display; for a 32-bit value the float and byte-order decoder shows all four word orders at once, so a wrong word order or scale is obvious. New to this? Read what a register map is and why addresses are off by one.

Questions about the LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU)

What Modbus registers does the LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) have?

This map lists 48 registers: 48 holding registers. 21 of them can be written. Registers vary with firmware, options and configuration, so confirm against the device.

Are the LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) Modbus addresses 0-based or 1-based?

The manufacturer's document numbers registers 1-based (subtract 1 for the wire address). Every address on this page is the 0-based wire address you put in the request; the documented number is shown under it where it differs. The manual prints communication addresses in hex (0h0300, 0h1103). Its only Modbus-RTU worked example writes Acc time (0x1103) and Dec time (0x1104) with starting address 0x1102, labelled 'Starting Address -1 (0x1103-1)', and the CRCs printed for that request (0x1202) and response (0xE534) are the correct CRCs for 0x1102, so the wire address is the printed address minus 1: 0h0380 frequency command is sent as 0x037F. The protocol text only says the starting address is the communication address; this map follows the worked frame. The manual states no different rule per area.

What are the minimum Modbus registers to integrate the LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU)?

Start with HR 897 Operation command (0h0382 operation command (run/stop/direction/reset)); HR 895 Frequency command (0h0380 frequency command, 0.01 Hz); HR 772 Inverter operation state (0h0305 operation state (ready/warning/fault, accel/decel, direction)); HR 784 Output frequency (0h0311 output frequency); HR 783 Output current (0h0310 output current); HR 788 DC link voltage (0h0315 DC link voltage); HR 815 Latch type trip information 1 (0h0330 latch trip flags); HR 819 Warning information (0h0334 warning flags).

How do I enable Modbus control of the LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU)?

What happens when the LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) loses Modbus communication?

Where is the official LS Electric LSLV-S100 AC drive (built-in RS-485 Modbus RTU) Modbus documentation?

The source is S100 User Manual (LSLV-S100 AC Variable Speed Drive) (S100_Manual_English_V4.3), revision 2026-09, published free by LS Electric at https://sol.ls-electric.com/us/en/product/document/8652.

Source: S100 User Manual (LSLV-S100 AC Variable Speed Drive) · S100_Manual_English_V4.3 · rev. 2026-09. Register numbers, types, scaling and units are reproduced as published; descriptions are our own.