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 | — · — · 1 |
| Manual address style | 40001/30001 style (wire address + 1, first digit = table) |
- The manual writes «00001 (0000)»: PLC number plus hex wire address in brackets; wire address = bracket value. Evidence: FC01 example on printed p.38 (PDF p.37) «01 01 00 00 00 03 7C 0B» reads L-OUT/GO-OUT/H-OUT (00001-00003) from 0x0000; reply «01 01 01 05 91 8B» (05 = L-OUT ON, GO-OUT OFF, H-OUT ON). FC02 example on the same page «01 02 00 00 00 01 B9 CA» → «01 02 01 01 60 48» = HOLD (10001 (0000)) ON. The CRCs of these and of the exception example on printed p.40 (PDF p.39) («01 03 00 95 00 07 14 24» → «01 83 02 C0 F1») were recomputed and all match.
- Modbus RTU, RS485 2-wire half duplex, up to 31 units, station 1-127, 2400-38400 bps, response wait 5-99 ms, stop bit fixed 1 (printed pp.8, 15, 45). The factory-default table (printed p.17) is drawn in LCD glyphs, so default station/baud/parity are not given. Data bits are not stated.
- Supported FCs 01h-04h, 06h, 10h (printed p.37). Data count shown as FC03 'n = 1-16', FC04 'n = 1-22', FC16 'n = 1-20' (printed p.39).
Registers (39)
«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.
39
Swipe the table sideways — the first column (manual address) stays put.
| Manual | Wire | Table | Name | Type | Unit · scale | R/W | FC | Details |
|---|---|---|---|---|---|---|---|---|
| 00001 (0000) | 0 (0x0000) | CO | L-OUT output state | BIT | R | 01 | 3- and 5-stage output models only 0 = OFF · 1 = ON printed p.41 (PDF p.40) | |
| 00002 (0001) | 1 (0x0001) | CO | GO-OUT output state | BIT | R | 01 | 3- and 5-stage output models only 0 = OFF · 1 = ON printed p.41 (PDF p.40) | |
| 00003 (0002) | 2 (0x0002) | CO | H-OUT output state | BIT | R | 01 | 3- and 5-stage output models only 0 = OFF · 1 = ON printed p.41 (PDF p.40) | |
| 00004 (0003) | 3 (0x0003) | CO | LL-OUT output state | BIT | R | 01 | 5-stage output models only 0 = OFF · 1 = ON printed p.41 (PDF p.40) | |
| 00005 (0004) | 4 (0x0004) | CO | HH-OUT output state | BIT | R | 01 | 5-stage output models only 0 = OFF · 1 = ON printed p.41 (PDF p.40) | |
| 10001 (0000) | 0 (0x0000) | DI | HOLD/RESET input state | BIT | R | 02 | 0 = OFF · 1 = ON printed p.41 (PDF p.40) | |
| 10002 (0001) | 1 (0x0001) | DI | BANK input state | BIT | R | 02 | LP3 only 0 = OFF · 1 = ON printed p.41 (PDF p.40) | |
| 30103 (0066) | 102 (0x0066) | IR | Hardware version | U16 | R | 04 | printed p.41 (PDF p.40) | |
| 30104 (0067) | 103 (0x0067) | IR | Firmware version | U16 | R | 04 | printed p.41 (PDF p.40) | |
| 30105 (0068) | 104 (0x0068) | IR | Model name (ASCII) | U16 | R | 04 | Manual shows "LP" (ASCII code). printed p.41 (PDF p.40) | |
| 30106 (0069) | 105 (0x0069) | IR | Case size (ASCII) | U16 | R | 04 | ASCII "3" = LP3, "6" = LP6. printed p.41 (PDF p.40) | |
| 31001 (03E8) | 1000 (0x03E8) | IR | Active lamp status (ACTIVE-LAMP) | U16 | R | 04 | Bits 0 and 6-9 reserved. Each bit 0 = OFF, 1 = ON. b1 LL-OUT lamp · b2 L-OUT lamp · b3 GO-OUT lamp · b4 H-OUT lamp · b5 HH-OUT lamp · b10 CWP lamp · b11 LOCK lamp · b12 HOLD lamp · b13 RESET lamp · b14 MIN lamp · b15 MAX lamp printed p.42 (PDF p.41) | |
| 31002 (03E9) | 1001 (0x03E9) | IR | Set lamp status (SET-LAMP) | U16 | R | 04 | Bits 0 and 8-15 reserved. b1 BANK_2 lamp · b2 BANK_1 lamp · b3 BANK lamp · b4 LL-SET lamp · b5 L-SET lamp · b6 H-SET lamp · b7 HH-SET lamp printed p.42 (PDF p.41) | |
| 31019 (03FA) | 1018 (0x03FA) | IR | Decimal point (DOT) | U16 | R | 04 | 0 = 00000 · 1 = 0000.0 · 2 = 000.00 · 3 = 00.000 · 4 = 0.0000 printed p.42 (PDF p.41) | |
| 31020 (03FB) | 1019 (0x03FB) | IR | Time scale (SCAL) | U16 | R | 04 | 0 = Decimal · 1 = Sexagesimal (60) printed p.42 (PDF p.41) | |
| 31021 (03FC) | 1020 (0x03FC) | IR | Time range (RANG) | U16 | R | 04 | 0 = 0.01 s · 1 = 0.1 s · 2 = Seconds (SEC) · 3 = Minutes (MIN) printed p.42 (PDF p.41) | |
| 31022 (03FD) | 1021 (0x03FD) | IR | Operation mode (FUNC) | U16 | R | 04 | 0 = F1 frequency/speed · 1 = F2 travel speed · 2 = F3 period · 3 = F4 passing time · 4 = F5 time difference · 5 = F6 time width · 6 = F7 length · 7 = F8 interval · 8 = F9 totalizing · 9 = F10 absolute ratio · 10 = F11 error ratio · 11 = F12 density · 12 = F13 error printed p.42 (PDF p.41) | |
| 40051 (0032) | 50 (0x0032) | HR | Operation mode (FUNC) | U16 | R/W | 03·06·10 | 0 = F1 frequency/speed · 1 = F2 travel speed · 2 = F3 period · 3 = F4 passing time · 4 = F5 time difference · 5 = F6 time width · 6 = F7 length · 7 = F8 interval · 8 = F9 totalizing · 9 = F10 absolute ratio · 10 = F11 error ratio · 11 = F12 density · 12 = F13 error printed p.44 (PDF p.43) | |
| 40052 (0033) | 51 (0x0033) | HR | Input A sensor type (IN-A) | U16 | R/W | 03·06·10 | For contact input use NPN-L or PNP-L. 0 = NPN-L · 1 = NPN-H · 2 = PNP-L · 3 = PNP-H printed p.44 (PDF p.43) | |
| 40053 (0034) | 52 (0x0034) | HR | Input B sensor type (IN-B) | U16 | R/W | 03·06·10 | Only in F2/F5/F7/F8/F9/F10/F11/F13 modes. 0 = NPN-L · 1 = NPN-H · 2 = PNP-L · 3 = PNP-H printed p.44 (PDF p.43) | |
| 40054 (0035) | 53 (0x0035) | HR | Output mode (O-MD) | U16 | R/W | 03·06·10 | F9 mode is fixed to OUT-H. Output models only. 0 = OUT-S · 1 = OUT-H · 2 = OUT-L · 3 = OUT-B · 4 = OUT-F · 5 = OUT-D printed p.44 (PDF p.43) | |
| 40057 (0038) | 56 (0x0038) | HR | Input A prescale exponent (P-AY) | S16 | R/W | 03·06·10 | Power-of-ten exponent (10^-9 to 10^9). Range -9 ~ 9 printed p.44 (PDF p.43) | |
| 40060 (003B) | 59 (0x003B) | HR | Input B prescale exponent (P-BY) | S16 | R/W | 03·06·10 | Only in F10/F11/F12/F13 modes. Range -9 ~ 9 printed p.44 (PDF p.43) | |
| 40061 (003C) | 60 (0x003C) | HR | Decimal point (DOT) | U16 | R/W | 03·06·10 | 0 = 00000 · 1 = 0000.0 · 2 = 000.00 · 3 = 00.000 · 4 = 0.0000 printed p.44 (PDF p.43) | |
| 40062 (003D) | 61 (0x003D) | HR | Time scale (SCAL) | U16 | R/W | 03·06·10 | Only in F3/F4/F5/F6 modes. 0 = Decimal · 1 = Sexagesimal (60) printed p.44 (PDF p.43) | |
| 40063 (003E) | 62 (0x003E) | HR | Time range (RANG) | U16 | R/W | 03·06·10 | 0 = 0.01 s · 1 = 0.1 s · 2 = Seconds (SEC) · 3 = Minutes (MIN) printed p.44 (PDF p.43) | |
| 40064 (003F) | 63 (0x003F) | HR | Display refresh period (D-REF) | U16 | R/W | 03·06·10 | Only in F1/F10/F11/F12/F13 modes. 0 = 0.05 s · 1 = 0.5 s · 2 = 1 s · 3 = 2 s · 4 = 4 s · 5 = 8 s printed p.44 (PDF p.43) | |
| 40101 (0064) | 100 (0x0064) | HR | Hysteresis (HYS) | U16 | R/W | 03·06·10 | Range depends on decimal point. Output models only. Range 0 ~ 9999 printed p.45 (PDF p.44) | |
| 40106 (0069) | 105 (0x0069) | HR | L/LL output limit (O-LIM) | U16 | R/W | 03·06·10 | 0 = L-OUT · 1 = S-TIM (start-up compensation) printed p.45 (PDF p.44) | |
| 40108 (006B) | 107 (0x006B) | HR | Power-failure memory (BACK) | U16 | R/W | 03·06·10 | F9 mode only. 0 = CLR · 1 = SAVE printed p.45 (PDF p.44) | |
| 40109 (006C) | 108 (0x006C) | HR | BANK change (B-CHG) | U16 | R/W | 03·06·10 | LP3 only. 0 = OFF · 1 = KEY · 2 = EX-IN (external input) printed p.45 (PDF p.44) | |
| 40110 (006D) | 109 (0x006D) | HR | Lock (LOCK) | U16 | R/W | 03·06·10 | 0 = OFF · 1 = KEY · 2 = PAR · 3 = K-P · 4 = BNK · 5 = OPT printed p.45 (PDF p.44) | |
| 40111 (006E) | 110 (0x006E) | HR | BANK number (BANK) | U16 | R/W | 03·06·10 | Changeable only when B-CHG is KEY. LP3 only. 0 = BANK #1 · 1 = BANK #2 printed p.45 (PDF p.44) | |
| 40151 (0096) | 150 (0x0096) | HR | Station number (S-NO) | U16 | R/W | 03·06·10 | Range 1 ~ 127 printed p.45 (PDF p.44) | |
| 40152 (0097) | 151 (0x0097) | HR | Baud rate (BPS) | U16 | R/W | 03·06·10 | 0 = 2400 bps · 1 = 4800 bps · 2 = 9600 bps · 3 = 19200 bps · 4 = 38400 bps printed p.45 (PDF p.44) | |
| 40153 (0098) | 152 (0x0098) | HR | Parity (PTY) | U16 | R/W | 03·06·10 | 0 = None · 1 = Odd · 2 = Even printed p.45 (PDF p.44) | |
| 40154 (0099) | 153 (0x0099) | HR | Stop bits (STOP) | U16 | R/W | 03·06·10 | 0 = 1 bit (fixed) printed p.45 (PDF p.44) | |
| 40155 (009A) | 154 (0x009A) | HR | Response wait time (RWT) | U16 | ms | R/W | 03·06·10 | Range 5 ~ 99 ms printed p.45 (PDF p.44) |
| 40156 (009B) | 155 (0x009B) | HR | Communication write protect (CWP) | U16 | R/W | 03·06·10 | 0 = OFF · 1 = ON printed p.45 (PDF p.44) |
Notes
- RS485 only on models ending in C: LP3-5A5NC, LP3-5A5PC (5-stage output + RS485), LP6-5ANC (indicator + RS485) (ordering info, printed p.6 (PDF p.5)).
- PV/MAX/MIN (31003-31008), set values LSV/HSV/LLSV/HHSV/DSV (31009-31018, 40001-40010), prescale mantissas P-AX/P-BX (40055-40056, 40058-40059) and auto-zero times AZ-A/AZ-B (40102-40105) are only described as 'double word, multi-register transfer'; the word order and scaling are not stated, so they are omitted.
- Start-up compensation time S-TMR (40107 (006A), 0.0-99.9 s) is omitted because its raw scaling is not stated. Product number (30101-30102) and the BANK #1/#2 blocks (40161-40180, 40201-40220, LP3 only) are also omitted — see printed pp.46-47.
- Exception codes 1 = unsupported function, 2 = start address mismatch, 3 = quantity mismatch, 4 = processing failure (printed p.40). Writes are blocked while CWP is ON.
- Page numbers: in this PDF, printed page = PDF page + 1.
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
- hanyoung-nux/lp.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
- LP SERIES LCD Multi Pulsemeter 사용설명서 — Hanyoung Nux, MF0601K240828_U (PDF created 2024-08-28) · printed pp.37-47 (PDF pp.36-46) communication, p.6 ordering, pp.8, 15 comm spec · checked 2026-10-29