LC Technology LC-Modbus-8R-D7 Modbus register map
8-CH Modbus RTU relay + optocoupler input module, RS485/5V TTL, 4800/9600/19200 baud. FC05/FC01: relay ch1-8 at coil addr 0-7 (0xFF00=on/0x0000=off). FC02: optocoupler input ch1-8 at discrete input addr 0-7. FC03 addr 0: device address R (1-255). FC03 addr 1000: baud rate status (2=4800,3=9600,4=19200). FC10 addr 1001: set baud rate. FC10 relay N flash mode: base addr=3+(N-1)*5, 2 regs (word1: 0x0004=flash-OFF, 0x0002=flash-ON; word2=delay×0.1s).
- Unofficial
- 19 registers
- Revision 2
Unofficial: Copied from an unofficial source and not tested. Read it as a draft and check a value on the real device before you rely on the rest. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.
Communication
- Protocol
- Modbus TCP and RTUdefault
- Unit ID
- 1default
- TCP port
- 502default
- Serial
- 9600 8E1 · 9600 baud, 8 data bits, even parity, 1 stop bit defaults
- Byte / word order
- ABCD · bytes big-endian, words high first
- Addresses
- 0-based
Connection values are defaults: the device may be configured differently.
Map
- Registers
- 19 holding registers
- Revision
- 2
- Added
- ()
- File
- maps/lc-technology/lc-modbus-8r-d7.mbmap.json · 5 KB · history
- SHA-256
- 3eec75c839239b28c7f68512b15f68ea5e67329c0bdc7adbb35ad7dc3339fc64
- Manufacturer
- www.chinalctech.com
Sources and notes
Source: Omni Console device library (OmniCoreST), modbus-library/lctech-8ch-relay.toml; Source: lctech-modbus-rtu-relay-8ch-register-table.html (chinalctech.com product page). Not verified against the manufacturer's documentation
- LC Technology LC-Modbus-8R-D7.
- Converted automatically from the Omni Console device library (OmniCoreST).
- Not verified against the manufacturer's documentation.
- Corrections are welcome (CONTRIBUTING.md). Change x_status once this table has been checked against the manual.
- | LC Technology LC-Modbus-8R-D7 8-Channel Modbus RTU Relay Module
- |
- | Source: lctech-modbus-rtu-relay-8ch-register-table.html (chinalctech.com product page)
- | Protocol: Modbus RTU; RS485 or 5V TTL UART; 4800/9600/19200 baud, default 9600
- | Device address: 1-255, default 255 (0xFF); address 0x00 = broadcast
- |
- | FC05 (Write Single Coil): relay 1-8 at coil addresses 0x0000-0x0007 (0xFF00=ON, 0x0000=OFF)
- | FC0F (Write Multiple Coils): addr 0x0000, count 8; data byte bit0-7 = relay 1-8
- | FC01 (Read Coils): addr 0x0000, count 8; returns relay 1-8 state (bit0=relay1)
- | FC02 (Read Discrete Inputs): addr 0x0000, count 8; optocoupler 1-8 state (bit0=ch1)
- | FC03 (Read Holding Registers): device address (addr 0), baud rate status (addr 1000)
- | FC10 (Write Multiple Registers): device address (addr 0), baud rate (addr 1001),
- | relay flash/delay mode (addr 3/8/13/18/23/28/33/38, 2 regs each)
- |
| Area | Address | Name | Type | Access | Unit | Scale | Description |
|---|---|---|---|---|---|---|---|
| HR | 0 | uint16 | R | ||||
| HR | 3 | uint16 | R | ||||
| HR | 4 | uint16 | R | ||||
| HR | 8 | uint16 | R | ||||
| HR | 9 | uint16 | R | ||||
| HR | 13 | uint16 | R | ||||
| HR | 14 | uint16 | R | ||||
| HR | 18 | uint16 | R | ||||
| HR | 19 | uint16 | R | ||||
| HR | 23 | uint16 | R | ||||
| HR | 24 | uint16 | R | ||||
| HR | 28 | uint16 | R | ||||
| HR | 29 | uint16 | R | ||||
| HR | 33 | uint16 | R | ||||
| HR | 34 | uint16 | R | ||||
| HR | 38 | uint16 | R | ||||
| HR | 39 | uint16 | R | ||||
| HR | 1000 | uint16 | R | ||||
| HR | 1001 | uint16 | R |
Help improve this map
- I tested it on a deviceReport whether it worked, even if you did not write the map.
- Suggest a correctionEdit the file on GitHub; it opens a pull request.
- Report a problemA wrong address, type, scale or byte order.
- Read the formatWhat each key of the file means (SPEC.md).