WET_WELL_LEVEL
Wet-well level from two transmitters with range, liveness and deviation voting, plus filtered rate of rise.
When to use it
Use WET_WELL_LEVEL when a wet well is measured by two independent transmitters — typically a radar or ultrasonic head and a submerged hydrostatic cell — and the pump control below it must be given one trustworthy level plus a rate of rise that can pre-empt the high-level alarm.
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 | — |
| LVL_A_PCT | REAL | % |
| LVL_A_OK | BOOL | — |
| LVL_B_PCT | REAL | % |
| LVL_B_OK | BOOL | — |
| EU_LO_PCT | REAL | % |
| EU_HI_PCT | REAL | % |
| DEV_LIM_PCT | REAL | % |
| DEV_DLY | TIME | — |
| FROZEN_BAND_PCT | REAL | % |
| FROZEN_TMO | TIME | — |
| RATE_TAU_S | REAL | s |
| RATE_RISE_LIM | REAL | %/min |
| RATE_DLY | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| LEVEL | REAL | % |
| RATE | REAL | %/min |
| SENSOR_OK | BOOL | — |
| RATE_VALID | BOOL | — |
| ALM_A_FAULT | BOOL | — |
| ALM_B_FAULT | BOOL | — |
| ALM_DEVIATION | BOOL | — |
| ALM_NO_SENSOR | BOOL | — |
| ALM_RATE_HI | BOOL | — |
| VOTE_SRC | USINT | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 9
- Simulated scans
- 908
- 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 WET_WELL_LEVEL — 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.