VFD Configuration¶
Engineer access required
The VFD Config tab is only visible when Engineering Mode is active and the user has engineer access.
Accessing the config tab¶
- Open the VFD machine's detail page.
- Enable Engineering Mode (toggle in the top-right of the application).
- Click the VFD Config tab in the machine tab bar.
Drive configuration¶
The drive configuration section stores high-level information about the physical drive:
| Field | Description |
|---|---|
| Drive family | The drive model family (e.g. danfoss_fc302). Controls which alarm definitions and default SOPs the platform uses. |
| Rated power (kW) | Nominal drive power — shown on the dashboard state card. |
| Rated current (A) | Used as a reference in future predictive insights. |
| Rated speed (RPM) | Used as a reference in future predictive insights. |
Parameter mapping¶
Parameter mapping tells the platform which parameter (already added to the machine) corresponds to each word register type. This is what enables the VFD Dashboard to decode live data.
Word register types¶
| Word type | Modbus parameter | Description |
|---|---|---|
status_word |
Par 16-03 | Drive operational status (16-bit FC Profile) |
alarm |
Par 16-90 | Alarm Word — primary trip and fault bits |
alarm2 |
Par 16-91 | Alarm Word 2 — extended hardware and safety faults |
warning |
Par 16-92 | Warning Word — non-tripping warning bits |
warning2 |
Par 16-93 | Warning Word 2 — extended warnings |
ext_status |
Par 16-94 | Extended Status Word — operational flags |
maintenance |
Par 16-96 | Maintenance Word — preventive maintenance due flags |
Steps to map a word register¶
- Add the Modbus parameter for the word register to the machine (via the Parameters tab) if it is not already there. Use
param_category = statusfor word registers. - Open VFD Config and find the word register row you want to map.
- Select the matching parameter from the dropdown.
- Save — the edge device receives the updated mapping within minutes and begins monitoring that register for bit transitions.
Tip
Analog readings (speed, current, power, temperature, etc.) do not need to be mapped here — add them to the machine as regular parameters and they will automatically appear in Drive Health Trends.
What happens after mapping¶
- The VFD Dashboard begins decoding the register and showing active conditions.
- The edge module starts comparing incoming values against the previous reading and posts open/close events to the alarm log when any bit changes.
- The Word Registers panel becomes visible for each mapped register type.