Category:ModBus
Windows Master Software
- ModScan
- ModbusPull
Command
- (Device address 1byte) + (CMD code 1byte) + (register address 2bytes) + (register data 2bytes) + CRC code (2bytes)
- CRC check by CRC-16/MODBUS
| Full CMD | ADDR. | CMD | register address | register data | CRC | Return |
|---|---|---|---|---|---|---|
| FF / 10 / 03 E9 00 01 02 00 / 02 / 4A 0C | FF | 10 - set baudreate | 03 E9 | 00 01 02 00 02 - 4800 | CRC | FF 10 03 E9 00 01 C5 A7 |
| FF / 10 / 03 E9 00 01 02 00 / 02 / 8B CC | FF | 10 - set baudreate | 03 E9 | 00 01 02 00 03 - 9600 | CRC | FF 10 03 E9 00 01 C5 A7 |
| FF / 10 / 03 E9 00 01 02 00 / 03 / CA 0E | FF | 10 - set baudreate | 03 E9 | 00 01 02 00 04 - 19200 | CRC | FF 10 03 E9 00 01 C5 A7 |
| FF / 01 / 00 00 / 00 08 / 28 12 | FF | 01 - read relay status | 00 00 | 00 08 | CRC | FF 01 01 01 A1 A0 - 4st byte for 8 relay status |
| FF / 02 / 00 00 / 00 08 / 6C 12 | FF | 02 - read optical coupler status | 00 00 | 00 08 | CRC | FF 02 01 01 51 A0 |
| FF / 03 / 03 E8 / 00 01 / 11 A4 | FF | 03 - read baudrae | 03 E8 | 00 01 | CRC | |
| FF / 05 / 00 00 / 00 00 / D8 14 | FF | 05 - relay control | 00 00 - relay 0 | 00 00 - relay OFF | CRC | |
| FF / 05 / 00 00 / FF 00 / 99 E4 | FF | 05 - relay control | 00 00 - relay 0 | 00 00 - relay ON | CRC | |
| FF / 05 / 00 01 / 00 00 / 89 D4 | FF | 05 - relay control | 00 01 - relay 1 | 00 00 - relay OFF | CRC | |
| FF / 05 / 00 01 / FF 00 / C8 24 | FF | 05 - relay control | 00 01 - relay 1 | FF 00 - relay ON | CRC | |
| FF / 05 / 00 02 / 00 00 / 79 D4 | FF | 05 - relay control | 00 02 - relay 2 | 00 00 - relay OFF | CRC | |
| FF / 05 / 00 02 / FF 00 / 38 24 | FF | 05 - relay control | 00 02 - relay 2 | FF 00 - relay ON | CRC | |
| FF / 05 / 00 03 / 00 00 / 28 14 | FF | 05 - relay control | 00 03 - relay 3 | 00 00 - relay OFF | CRC | |
| FF / 05 / 00 03 / FF 00 / 69 E4 | FF | 05 - relay control | 00 03 - relay 3 | FF 00 - relay ON | CRC | |
| FF / 0F / 00 00 / 00 08 / 01 FF / 30 1D | FF | 0F - turn ON all relays | 00 00 | 00 08 01 FF | CRC | |
| FF / 0F / 00 00 / 00 08 / 01 00 / 70 5D | FF | 0F - turn OFF all relays | 00 00 | 00 08 01 00 | CRC |
| CMD | Description | Return | Return Description |
|---|---|---|---|
| 00 01 00 00 00 01 02 00 (01) 6A 00 | set device address 01 | 00 01 00 00 00 01 02 00 (01) 6A 00 | return the same |
| 00 01 00 00 00 01 02 00 (FF) EB 80 | set device address FF | 00 01 00 00 00 01 02 00 (FF) EB 80 | return the same |
| 00 / 03 / 00 00 / 00 01 / 85 DB | read device address | 00 03 02 00 /FF C5 C4 | FF is the return device address |
| FF 10 (00 03) 00 02 04 00 04 (00 14) C5 9F | turn on then off after 2s, (relay address), (delay time 0x14 * 0.1 = 20 * 0.1) | ||
| FF 10 (00 03) 00 02 04 00 02 (00 1E) A5 99 | turn of then on after 3s, (relay address), (delay time 0x1E * 0.1 = 30 * 0.1) |
Modbus function code - 2nd byte
Modbus Function Codes Recognized by CSI Gateways
Function Code Register Type
- 1 Read Coil
- 2 Read Discrete Input
- 3 Read Holding Registers
- 4 Read Input Registers
- 5 Write Single Coil
- 6 Write Single Holding Register
- 15 Write Multiple Coils
- 16 Write Multiple Holding Registers