UHT_CTRL
UHT sterility supervision on temperature and back-pressure, with a latched loss-of-sterility block on forward flow.
When to use it
Use UHT_CTRL when a direct or indirect UHT plant runs product to an aseptic filler and forward flow must be permitted only while both the sterilising temperature and the back-pressure that keeps product liquid have been held for the full holding-tube time.
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 | — |
| PROD_T | REAL | °C |
| TEMP_OK | BOOL | — |
| SP | REAL | °C |
| DEV_K | REAL | K |
| BACKPRESS | REAL | barg |
| PRESS_OK | BOOL | — |
| MIN_BACKPRESS | REAL | barg |
| HOLD_T | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| IN_SPEC | BOOL | — |
| FWD_FLOW | BOOL | — |
| DIVERTED | BOOL | — |
| HOLD_PROVEN | BOOL | — |
| RESTERILISE_REQ | BOOL | — |
| ALM_STERILITY_LOST | BOOL | — |
| ALM_UNDER_TEMP | BOOL | — |
| ALM_LOW_PRESS | BOOL | — |
| ALM_TEMP_FAULT | BOOL | — |
| ALM_PRESS_FAULT | BOOL | — |
| DIVERT_TIME_S | REAL | s |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 9
- Simulated scans
- 231
- 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 UHT_CTRL — free
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