Maintenance HMI Reference
NORTHSTARSHOW SYSTEMS
Maintenance HMI Reference
Deep reference for the Cuemaster Maintenance dashboard
| Document Number | Revision | Date | Platform Version |
|---|---|---|---|
| NSSS-DOC-0042 | A | 2026-05-20 | 1.0 |
When Maintenance HMI Appears
Cuemaster swaps to the amber Maintenance HMI when HelmOS broadcasts maintenance: true. Two sources trigger this:
- The Polaris Bridge key switch (operator-facing route)
- The Ctrl+Shift+Alt+M keyboard shortcut (admin override)
What's Suspended in Maintenance
| Mechanism | Behaviour During Maintenance |
|---|---|
| Sensor inputs (event-input) | Logged but do not fire cues |
| Input combos (event-input-combo) | Tracked but no cues fire |
| Manual GO from Cuemaster Cues tab | Buttons disabled |
| Scheduled cues (event-schedule) | Suspended |
| Cue chains (event-cue-complete) | Suspended |
| Cuemaster events (event-cuemaster) | Suspended |
| Deploy to Helm (HTTP /api/deploy) | Refused with HTTP 409 unless explicitly allowed |
| Actuator Test buttons | Active — bypass the suspension by design |
| Firmware OTA push | Active — maintenance is the only time OTA is permitted |
Interlocks Tab
Displays the safety chain from left to right. Each link is green (OK), amber (Bypassed), or red (Fault). A faulted link upstream prevents downstream evaluation — show triggers cannot fire.
Actuator Test Tab
Buttons grouped by category (GPIO Relays, Audio Channels, Video Outputs). Each click fires a single ~600 ms pulse to the targeted output. Used for wiring verification before unlocking the show.
CAUTION —Pneumatic actuators and moving effects physically activate when tested. Verify the zone is clear of personnel before triggering.
Firmware Tab
Bundle cards across the top show the firmware variants bundled in the current project. Below, a node table lists every registered board with its current and available firmware versions. Per-node Update buttons and a Rolling Update All button push OTA over Wi-Fi.
I/O Status Tab
Live HIGH/LOW state of every output channel on every registered node, updated via WebSocket as channel state changes.
Related Documents
- NSSS-DOC-0040Cuemaster Operator Manual
- NSSS-DOC-0061Firmware OTA Update Guide
- NSSS-DOC-0062Maintenance Mode Procedures
Revision History
| Revision | Date | Description |
|---|---|---|
| A | 2026-05-20 | Initial publication |