LOOP_SANITIZATION
Thermal or ozone loop sanitisation sequence with return-gated hold accumulation and a return-to-service phase.
When to use it
Use LOOP_SANITIZATION when a purified-water or WFI distribution loop is sanitised periodically — hot water above 80 degC, or an ozone residual held through the loop — and the cycle must prove time at condition at the loop RETURN before the loop is given back to production.
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 | — |
| ABORT | BOOL | — |
| SUPPLY_PV | REAL | degC or mV |
| RETURN_PV | REAL | degC or mV |
| PV_OK | BOOL | — |
| FLOW_OK | BOOL | — |
| SP | REAL | degC or mV |
| HOLD_T | TIME | — |
| RETURN_MIN | REAL | degC or mV |
| CHARGE_TMO | TIME | — |
| RELEASE_MAX | REAL | degC or mV |
| MODE_OZONE | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| PHASE | USINT | — |
| HEATING | BOOL | — |
| HOLD | BOOL | — |
| DONE | BOOL | — |
| FAIL | BOOL | — |
| HEAT_CMD | BOOL | — |
| OZONE_CMD | BOOL | — |
| USE_INHIBIT | BOOL | — |
| HOLD_S | REAL | s |
| ALM_CHARGE_TMO | BOOL | — |
| ALM_HOLD_INTERRUPTED | BOOL | — |
| ALM_PV_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Supervised control write
LOOP_SANITIZATION 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
- 12
- Simulated scans
- 558
- 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 LOOP_SANITIZATION — 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 and the datasheet.
Every block in the catalogue is free to download, in every format it ships, with no purchase and no card. Browsing needs no account at all; downloading needs a signed-in one, so the block lands in your library and re-downloads whenever you need it.
Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.