> For the complete documentation index, see [llms.txt](https://docs.smart-stuff.nl/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.smart-stuff.nl/p1-modbus-dongle/firmware-v2-current/register-mapping/sdm630.md).

# SDM630

## Mapping behaviour

* Device Manager mapping value: `1`
* Profile: `SDM630`
* Read function codes: `FC03` and `FC04`
* Register widths: 32-bit entries unless a text/fill range is shown
* 32-bit word order: high word first (MSW-LSW)
* Unmapped register handling: Zero-filled

{% hint style="info" %}
Device ID, baud rate and serial format are global firmware v2 settings. They are not changed when this mapping is selected.
{% endhint %}

## Register overview

| Address (decimal / hex) | Words | Type      | Source or fixed value         | Conversion | Missing         |
| ----------------------- | ----: | --------- | ----------------------------- | ---------- | --------------- |
| `0` / `0x0000`          |     2 | `float32` | `voltage_l1_v`                | —          | source\_default |
| `2` / `0x0002`          |     2 | `float32` | `voltage_l2_v`                | —          | source\_default |
| `4` / `0x0004`          |     2 | `float32` | `voltage_l3_v`                | —          | source\_default |
| `6` / `0x0006`          |     2 | `float32` | `derived_current_l1_a`        | —          | source\_default |
| `8` / `0x0008`          |     2 | `float32` | `derived_current_l2_a`        | —          | source\_default |
| `10` / `0x000A`         |     2 | `float32` | `derived_current_l3_a`        | —          | source\_default |
| `12` / `0x000C`         |     2 | `float32` | `net_power_l1_kw`             | scale 1000 | source\_default |
| `14` / `0x000E`         |     2 | `float32` | `net_power_l2_kw`             | scale 1000 | source\_default |
| `16` / `0x0010`         |     2 | `float32` | `net_power_l3_kw`             | scale 1000 | source\_default |
| `24` / `0x0018`         |     2 | `float32` | `net_power_l1_kw`             | scale 1000 | source\_default |
| `26` / `0x001A`         |     2 | `float32` | `net_power_l2_kw`             | scale 1000 | source\_default |
| `28` / `0x001C`         |     2 | `float32` | `net_power_l3_kw`             | scale 1000 | source\_default |
| `30` / `0x001E`         |     2 | `float32` | `direction_l1`                | —          | source\_default |
| `32` / `0x0020`         |     2 | `float32` | `direction_l2_or_zero`        | —          | source\_default |
| `34` / `0x0022`         |     2 | `float32` | `direction_l3_or_zero`        | —          | source\_default |
| `48` / `0x0030`         |     2 | `float32` | `current_total_legacy_a`      | —          | source\_default |
| `52` / `0x0034`         |     2 | `float32` | `net_power_total_kw`          | scale 1000 | source\_default |
| `60` / `0x003C`         |     2 | `float32` | `net_power_total_kw`          | scale 1000 | source\_default |
| `62` / `0x003E`         |     2 | `float32` | `direction_total`             | —          | source\_default |
| `70` / `0x0046`         |     2 | `float32` | `constant 50.0f`              | —          | —               |
| `72` / `0x0048`         |     2 | `float32` | `energy_delivered_total_kwh`  | —          | source\_default |
| `74` / `0x004A`         |     2 | `float32` | `energy_returned_total_kwh`   | —          | source\_default |
| `200` / `0x00C8`        |     2 | `float32` | `line_voltage_l12_v`          | —          | source\_default |
| `202` / `0x00CA`        |     2 | `float32` | `line_voltage_l23_v`          | —          | source\_default |
| `204` / `0x00CC`        |     2 | `float32` | `line_voltage_l31_v`          | —          | source\_default |
| `342` / `0x0156`        |     2 | `float32` | `energy_total_throughput_kwh` | —          | source\_default |
| `406` / `0x0196`        |     2 | `uint32`  | `pre40`                       | —          | source\_default |
| `408` / `0x0198`        |     2 | `uint32`  | `firmware_version_packed`     | —          | source\_default |
| `410` / `0x019A`        |     2 | `uint32`  | `p1_device_magic`             | —          | source\_default |

## Reading the table

* **Words** is the number of consecutive 16-bit Modbus registers occupied by the entry.
* **Source** names correspond directly to the firmware v2 recipe source.
* **Conversion** records the exact scale, transform or direction handling configured by the recipe.
* This page is generated from `mb_recipe.h` and `modbus_profiles.h` for firmware 2.3.0.