Modbus RTU Parser
Paste a Modbus RTU frame in hex and decode each field — slave address, function code, data, and CRC-16 validation.
Example Frames
Modbus RTU Frame Reference
| Bytes | Field | Description |
|---|---|---|
| 0 | Slave Address | Device address (0 = broadcast, 1–247 = device) |
| 1 | Function Code | Operation to perform (1–127, or 128+ for exceptions) |
| 2 to N-2 | Data | Request/response payload (variable length) |
| N-1, N | CRC-16 | Error check (little-endian byte order) |