DEWATER_POLYMER_TRIM
Dewatering polymer dose trimmed on centrate or filtrate clarity, bounded as a percentage of the feed-forward dose, with mass-flow totalising and a blind fallback to feed-forward.
When to use it
Use DEWATER_POLYMER_TRIM when a centrifuge or belt press is dosed with polymer at a dose set from the solids loading, and a centrate or filtrate turbidity measurement is available to trim that dose against the capture actually being achieved.
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 | — |
| RUNNING | BOOL | — |
| CENTRATE_NTU | REAL | NTU |
| NTU_OK | BOOL | — |
| NTU_SP | REAL | NTU |
| DOSE | REAL | kg/tDS |
| KP | REAL | %/NTU |
| TI_S | REAL | s |
| TRIM_UP_PCT | REAL | % |
| TRIM_DN_PCT | REAL | % |
| DOSE_MIN | REAL | kg/tDS |
| DOSE_MAX | REAL | kg/tDS |
| NTU_HI | REAL | NTU |
| FEED_TDS_H | REAL | t/h |
| HOLD_TMO | TIME | — |
| NTU_TMO | TIME | — |
| TRIM_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| DOSE_TRIM | REAL | kg/tDS |
| TRIM_PCT | REAL | % |
| POLY_KGH | REAL | kg/h |
| POLY_TOTAL_KG | REAL | kg |
| TRIMMING | BOOL | — |
| HELD | BOOL | — |
| ALM_HIGH_NTU | BOOL | — |
| ALM_TRIM_LIMIT | BOOL | — |
| ALM_NTU_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 11
- Simulated scans
- 620
- 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 DEWATER_POLYMER_TRIM — free
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