Template:Networking rutos manual modbus modbus tcp get parameters table
Get Parameters
Modbus parameters are held within registers. Each register contains 2 bytes of information. For simplification, the number of registers for storing numbers is 2 (4 bytes), while the number of registers for storing text information is 16 (32 bytes).
The register numbers and corresponding system values are described in the table below:
| required value | register address | register number | number of registers | representation |
|---|---|---|---|---|
| System uptime | 1 | 2 | 2 | 32 bit unsigned integer |
| System hostname | 7 | 8 | 16 | Text |
| Router serial number | 39 | 40 | 16 | Text |
| LAN MAC address | 55 | 56 | 16 | Text |
| Router name | 71 | 72 | 16 | Text |
| Current WAN IP address | 139 | 140 | 2 | 8 bit unsigned integer |
| Digital non-isolated input | 324 | 325 | 1 | 16 bit unsigned integer |
| Digital open collector output | 325 | 326 | 1 | 16 bit unsigned integer |
| PIN 3 direction | 326 | 327 | 1 | 16 bit unsigned integer |
| PIN 4 direction | 327 | 328 | 1 | 16 bit unsigned integer |
| Unix timestamp | 364 | 365 | 2 | 32 bit unsigned integer |
| Local ISO time | 366 | 367 | 12 | Text |
| UTC time | 378 | 379 | 12 | Text |
| LAN IP | 394 | 395 | 2 | 8 bit unsigned integer |