IT_SHED_COORD
Two-stage graceful IT load-shed coordinator with measured achievement, grace-period escalation to a forced shed, and one-stage-at-a-time restoration.
When to use it
Use IT_SHED_COORD when a hall must remove IT load on demand — utility lost and the generator cannot carry the full block, a cooling failure with minutes of thermal ride-through, or a UPS on battery — and the shed is executed by an orchestration layer that needs to be told how much to remove and given time to do it gracefully.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type | Unit |
|---|---|---|
| ENABLE | BOOL | — |
| SHED_1 | BOOL | — |
| SHED_2 | BOOL | — |
| RESTORE | BOOL | — |
| STAGE1_KW | REAL | kW |
| STAGE2_KW | REAL | kW |
| GRACE | TIME | — |
| IT_KW | REAL | kW |
| TOL_KW | REAL | kW |
| ALLOW_FORCE | BOOL | — |
| STABLE | BOOL | — |
| RESTORE_HOLD | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| SHED_KW | REAL | kW |
| STAGE | USINT | stage |
| SHED_REQ | BOOL | — |
| FORCE_REQ | BOOL | — |
| ACHIEVED_KW | REAL | kW |
| DONE | BOOL | — |
| FAIL | BOOL | — |
| RESTORE_PERMIT | BOOL | — |
| ALM_SHED_FAIL | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 13
- Simulated scans
- 297
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
Download IT_SHED_COORD — free
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