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 | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
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
- Conforms to IEC 61499
Download LYO_FREEZE_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.