UV_DOSE_CTRL
UV dose pacing on flow and transmittance: bank staging, ballast power and a delivered-dose estimate that fails towards more dose.
When to use it
Use UV_DOSE_CTRL when a multi-bank UV reactor must hold a validated dose as flow and UV transmittance vary, and the plant needs a delivered-dose estimate to drive a divert permissive and an off-spec time record.
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 | — |
| FLOW | REAL | m3/h |
| FLOW_OK | BOOL | — |
| UVT_PCT | REAL | % |
| UVT_OK | BOOL | — |
| DOSE_SP | REAL | mJ/cm2 |
| BANKS_AVAIL | USINT | — |
| BANK_CAP | REAL | mJ·m3/(cm2·h) |
| UVT_RATED | REAL | % |
| EFF_PATH_CM | REAL | cm |
| LAMP_AGE_PCT | REAL | % |
| POWER_MIN_PCT | REAL | % |
| POWER_MAX_PCT | REAL | % |
| UVT_ASSUMED | REAL | % |
| FLOW_RATED | REAL | m3/h |
| MIN_FLOW | REAL | m3/h |
| HYST_BANKS | REAL | ratio |
| STAGE_T | TIME | — |
| LOW_DOSE_T | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| BANKS_ON | USINT | — |
| POWER_PCT | REAL | % |
| DOSE | REAL | mJ/cm2 |
| DOSE_VALID | BOOL | — |
| DISINFECT_OK | BOOL | — |
| INT_FACTOR | REAL | ratio |
| UNDERDOSE_S | REAL | s |
| ALM_LOW_DOSE | BOOL | — |
| ALM_UVT_FAULT | BOOL | — |
| ALM_FLOW_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
UV_DOSE_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
- 11
- Simulated scans
- 180
- 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 UV_DOSE_CTRL — free
Create a free Ri Tech account to download the block. You get the Structured Text body, the Rockwell Add-On Instruction (.L5X), the Schneider Control Expert DFB (.XDB), PLCopen XML, the IEC 61499 function block type (.fbt) and the datasheet.
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Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.