BLACK_START_SEQ
Black-start orchestration for one set: priority arbitration for the dead bus, dead-bus close without a sync check, and synchronising on if another set got there first.
When to use it
Use BLACK_START_SEQ when several generators can start onto the same dead bus, exactly one of them may energise it, and every other set must then synchronise onto the bus the first one made — one instance of this block per set.
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 |
|---|---|
| ENABLE | BOOL |
| START | BOOL |
| ABORT | BOOL |
| DEAD_BUS_OK | BOOL |
| BUS_LIVE | BOOL |
| GEN_READY | BOOL |
| SYNC_OK | BOOL |
| ST_52G | BOOL |
| PRIORITY | USINT |
| ARB_T | TIME |
| READY_TMO | TIME |
| SYNC_TMO | TIME |
| CLOSE_TMO | TIME |
| ACK | BOOL |
Outputs
| Port | Type | Unit |
|---|---|---|
| STEP | USINT | — |
| GEN_START_CMD | BOOL | — |
| CLOSE_52G | BOOL | — |
| DEAD_BUS_CLOSE | BOOL | — |
| SYNCING | BOOL | — |
| ARB_REMAIN_S | REAL | s |
| ENERGIZED | BOOL | — |
| FAILED | BOOL | — |
| ALM_FAIL_TO_START | BOOL | — |
| ALM_SYNC_TMO | BOOL | — |
| ALM_CLOSE_FAIL | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
BLACK_START_SEQ commands a real actuator. It is written to sit underneath your own interlock, permissive and protection logic — not to replace it. Commission it as you would any control block you wrote yourself.
Validation evidence
- Tests
- 9
- Simulated scans
- 119
- 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
- Conforms to IEC 61499
Download BLACK_START_SEQ — free
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