Status Word
Alongside the mode, the system exposes a set of global application flags — the status word of the system. It is readable in the /app_flags state at the root level and broadcast to the host in the system status message. Where the mode tells the phase the system is in, the flags tell why it behaves the way it does — each bit is meaningful on its own:
| Bit | Name | Meaning |
|---|---|---|
| 0 | Enabled | The system is enabled — the combined start request (CAN / GPIO per start_sel) is active |
| 1 | Ignition | The ICE shall run — mirrors the ignition relay: set through starting and running |
| 2 | Reduced | The system is not capable of sinking the full torque — a controller of a pair is missing or in error, or any controller is derated (thermal or voltage limits) |
| 3 | ICE reduced | Reserved for an ICE-side limitation; currently always 0 |
| 4 | CC | Constant current — a current limit of the DC regulation is holding the generation back (/dc/ibneg_bms, ibneg_total) |
| 5 | CV | Constant voltage — the voltage limit of the DC regulation is holding the generation back (/dc/ubmax); never set together with CC |
| 6 | BMS/Battery failure | A failure of the BMS or the battery, as inferred by the SGCU — the battery current report is missing: never received, or timed out (the other DC limits keep acting) |
| 7 | ECU/ICE failure | Reserved for an ECU or engine failure; currently always 0 |
Reduced, CC and CV together explain a capability below the requested cmd: Reduced means the electrical machines themselves cannot take the full torque, while CC/CV mean the battery does not accept it — the generation is deliberately held back in a constant-current or constant-voltage charging regime.