OUR_CER_CALC
Off-gas oxygen uptake, carbon-dioxide evolution and respiratory quotient with the inert-gas balance correction.
When to use it
Use OUR_CER_CALC when a bioreactor's inlet and outlet gas are analysed for oxygen and carbon dioxide and the culture's respiration has to be computed on line, typically to drive a feed strategy or to detect the end of a batch.
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 | — |
| O2_IN | REAL | mol% |
| O2_OUT | REAL | mol% |
| CO2_IN | REAL | mol% |
| CO2_OUT | REAL | mol% |
| GAS_FLOW | REAL | L/min |
| VOLUME | REAL | L |
| GAS_OK | BOOL | — |
| VOL_OK | BOOL | — |
| INERT_CORR | BOOL | — |
| MOLAR_VOL | REAL | L/mol |
| FILT_TAU | REAL | s |
| RQ_LO | REAL | - |
| RQ_HI | REAL | - |
Outputs
| Port | Type | Unit |
|---|---|---|
| OUR | REAL | mmol/L/h |
| CER | REAL | mmol/L/h |
| RQ | REAL | - |
| VALID | BOOL | — |
| RQ_VALID | BOOL | — |
| ALM_GAS_FAULT | BOOL | — |
| ALM_RANGE | BOOL | — |
| ALM_RQ_RANGE | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 9
- Simulated scans
- 2127
- 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 OUR_CER_CALC — 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.