FOAM_CTRL
Antifoam dosing on a foam probe — debounced, pulsed, locked out between doses, and capped cumulatively.
When to use it
Use FOAM_CTRL when a conductivity or capacitance foam probe in the headspace of a bioreactor triggers an antifoam pump, and the total antifoam delivered over the batch has to be capped because antifoam is a process contaminant as well as a remedy.
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 | — |
| FOAM_SW | BOOL | — |
| FOAM_OK | BOOL | — |
| MAX_ADD_ML | REAL | mL |
| PUMP_ML_S | REAL | mL/s |
| DETECT_DLY | TIME | — |
| DOSE_TIME | TIME | — |
| LOCKOUT_TIME | TIME | — |
| MAX_DOSES | INT | — |
| RESET_TOTAL | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| ANTIFOAM | BOOL | — |
| ADDED_ML | REAL | mL |
| DOSE_COUNT | INT | — |
| LOCKED_OUT | BOOL | — |
| FOAM_CONF | BOOL | — |
| ALM_MAX_ADD | BOOL | — |
| ALM_FOAM_PERSIST | BOOL | — |
| ALM_PROBE_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 8
- Simulated scans
- 218
- 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 FOAM_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.