CONDUCTIVITY_MON
Conductivity and TDS monitor with temperature compensation to 25 °C, banded limits and a windowed rate-of-rise alarm for saline intrusion.
When to use it
Use CONDUCTIVITY_MON when a conductivity cell measures final effluent, a works inlet or a reuse stream, and both the absolute level and a sudden rise matter — the rise being the signature of a trade discharge or a seawater/groundwater intrusion.
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 | — |
| COND_RAW | REAL | uS/cm |
| COND_OK | BOOL | — |
| TEMP_C | REAL | degC |
| TEMP_OK | BOOL | — |
| HI | REAL | uS/cm |
| HI_HI | REAL | uS/cm |
| DB | REAL | uS/cm |
| ALPHA_PCT | REAL | %/K |
| TDS_FACTOR | REAL | mg/L per uS/cm |
| RANGE_HI | REAL | uS/cm |
| ROC_LIM | REAL | uS/cm per min |
| ROC_T | TIME | — |
| ALM_DLY | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| US_CM | REAL | uS/cm |
| TDS_MG_L | REAL | mg/L |
| VALID | BOOL | — |
| COMP_OK | BOOL | — |
| ROC_US_MIN | REAL | uS/cm per min |
| ALM_HI | BOOL | — |
| ALM_HI_HI | BOOL | — |
| ALM_ROC | BOOL | — |
| ALM_COND_FAULT | BOOL | — |
| ALM_TEMP_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 11
- Simulated scans
- 217
- 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 CONDUCTIVITY_MON — 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.