SOFT_UNLOAD_RAMP
Soft unloading to near-zero kW before a breaker opening, with a proven at-zero permissive and a reverse-power hold.
When to use it
Use SOFT_UNLOAD_RAMP when a paralleled set is being taken off load and its breaker must not be opened until the machine is genuinely down to a few percent of rating, so the remaining machines do not inherit a step.
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 | — |
| START | BOOL | — |
| BRK_CLOSED | BOOL | — |
| KW | REAL | kW |
| KW_OK | BOOL | — |
| KW_RATED | REAL | kW |
| RATE_KW_S | REAL | kW/s |
| TRIP_KW | REAL | kW |
| CONFIRM_T | TIME | — |
| UNLOAD_TMO | TIME | — |
| REV_KW | REAL | kW |
| REV_TMO | TIME | — |
| KP | REAL | %/% |
| TI | REAL | s |
| BIAS_LIM | REAL | % |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| BIAS | REAL | % |
| KW_SP | REAL | kW |
| PCT_LOAD | REAL | % |
| RAMPING | BOOL | — |
| AT_ZERO | BOOL | — |
| AT_LIMIT | BOOL | — |
| VALID | BOOL | — |
| ALM_UNLOAD_TMO | BOOL | — |
| ALM_REV_PWR | BOOL | — |
| ALM_KW_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 12
- Simulated scans
- 286
- 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 SOFT_UNLOAD_RAMP — free
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