THERMAL_LOG_REDUCE
Accumulated pathogen log-reduction integrator with F₀ equivalent time and a gap-supervised record.
When to use it
Use THERMAL_LOG_REDUCE when a thermal process has to report how much pathogen lethality it actually delivered — log reduction and equivalent time at a reference temperature — integrated continuously rather than assumed from a dwell timer.
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 | — |
| T | REAL | °C |
| TEMP_OK | BOOL | — |
| D_REF | REAL | min |
| Z | REAL | K |
| T_REF | REAL | °C |
| CYCLE | TIME | — |
| TARGET_LOG | REAL | log10 |
| RESET | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| LOG_RED | LREAL | log10 |
| F0_MIN | REAL | min |
| RATE_LOG_PER_MIN | REAL | log10/min |
| TARGET_MET | BOOL | — |
| VALID | BOOL | — |
| ALM_TEMP_FAULT | BOOL | — |
| ALM_SCAN_GAP | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 10
- Simulated scans
- 353
- 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 THERMAL_LOG_REDUCE — 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.