JET_FAN_CTRL
Reversible jet-fan group staging to a commanded longitudinal thrust, with coast-down before any direction reversal.
When to use it
Use JET_FAN_CTRL when a bank of reversible jet fans provides longitudinal thrust in a tunnel bore, and the ventilation controller commands a thrust and a direction rather than switching individual fans.
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 | — |
| FIRE_MODE | BOOL | — |
| N_FANS | USINT | — |
| N_AVAIL | USINT | — |
| THRUST_SP | REAL | N |
| DIR | BOOL | — |
| FAN_THRUST_N | REAL | N |
| STAGE_DLY | TIME | — |
| REV_DWELL | TIME | — |
| NO_FAN_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| FANS_ON | USINT | — |
| THRUST_N | REAL | N |
| DIR_CMD | BOOL | — |
| FANS_REQ | USINT | — |
| REVERSING | BOOL | — |
| VALID | BOOL | — |
| ALM_INSUFFICIENT | BOOL | — |
| ALM_NO_FANS | BOOL | — |
| ALM_SP_IMPLAUSIBLE | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Supervised control write
JET_FAN_CTRL 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
- 8
- Simulated scans
- 339
- 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 JET_FAN_CTRL — free
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