LYO_FREEZE_CTRL
Freezing-stage shelf-temperature ramp and product soak, with a freeze-complete criterion that requires a live product thermocouple.
When to use it
Use LYO_FREEZE_CTRL when the freezing stage of a lyophilisation cycle is run on a shelf-temperature ramp to a hold, and the batch may only be handed to primary drying once the product itself has been proved fully frozen.
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 | — |
| RUN | BOOL | — |
| SHELF_SP | REAL | degC |
| RAMP_C_MIN | REAL | degC/min |
| SHELF_T_PV | REAL | degC |
| SHELF_T_OK | BOOL | — |
| PRODUCT_T_PV | REAL | degC |
| PRODUCT_T_OK | BOOL | — |
| SOAK_SP | REAL | degC |
| SOAK_HYST_C | REAL | degC |
| SOAK_TIME | TIME | — |
| DEV_LIMIT | REAL | degC |
| DEV_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| SHELF_T | REAL | degC |
| PRODUCT_T | REAL | degC |
| SHELF_CMD_C | REAL | degC |
| SOAK_ELAPSED_S | REAL | s |
| RAMPING | BOOL | — |
| SOAKING | BOOL | — |
| FREEZE_DONE | BOOL | — |
| VALID | BOOL | — |
| ALM_TC_FAULT | BOOL | — |
| ALM_SHELF_DEV | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 9
- Simulated scans
- 818
- 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 LYO_FREEZE_CTRL — free
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