SIP_CYCLE_CTRL
Steam-in-place cycle — air removal, heat-up, exposure gated on every RTD, and cooling, with F0 integrated from the coldest point.
When to use it
Use SIP_CYCLE_CTRL when a vessel, filter housing or transfer line is sterilised in place with clean steam, several RTDs are fitted at the points the thermal study identified, and exposure must be gated on the COLDEST of them rather than on the steam header.
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 |
|---|---|---|
| START | BOOL | — |
| ABORT | BOOL | — |
| ACK | BOOL | — |
| TEMP_SP | REAL | degC |
| ALL_RTD_MIN | REAL | degC |
| EXP_T | TIME | — |
| T1 | REAL | degC |
| T2 | REAL | degC |
| T3 | REAL | degC |
| T4 | REAL | degC |
| OK1 | BOOL | — |
| OK2 | BOOL | — |
| OK3 | BOOL | — |
| OK4 | BOOL | — |
| N_RTD | USINT | — |
| DRAIN_VERIFIED | BOOL | — |
| T_REF | REAL | degC |
| Z_VALUE | REAL | degC |
| F0_GATE | REAL | degC |
| F0_MIN | REAL | min |
| HEAT_TMO | TIME | — |
| COOL_T | TIME | — |
| CYCLE_TMO | TIME | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| PHASE | USINT | — |
| F0 | REAL | min |
| T_COLD | REAL | degC |
| COLD_RTD | USINT | — |
| EXP_ELAPSED_S | REAL | s |
| HEATING | BOOL | — |
| EXPOSURE | BOOL | — |
| DONE | BOOL | — |
| CYCLE_ACCEPTED | BOOL | — |
| FAIL | BOOL | — |
| FAIL_CODE | USINT | — |
| STEAM_CMD | BOOL | — |
| DRAIN_CMD | BOOL | — |
| VENT_CMD | BOOL | — |
| COOL_CMD | BOOL | — |
| VALID | BOOL | — |
| ALM_RTD_FAULT | BOOL | — |
| ALM_EXCURSION | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
SIP_CYCLE_CTRL 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
- 10
- Simulated scans
- 310
- 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 SIP_CYCLE_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.