VIABLE_SAMPLER_CTRL
Active-air viable sampler control: draws a programmed volume at the rated flow and invalidates the plate if it cannot.
When to use it
Use VIABLE_SAMPLER_CTRL when an active-air microbial sampler draws a metered volume of room air onto a settle or impaction plate, and the volume actually drawn has to be recorded and defensible.
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 | — |
| START | BOOL | — |
| ABORT | BOOL | — |
| VOLUME_L | REAL | l |
| PROG_NO | USINT | — |
| FLOW_LPM | REAL | l/min |
| FLOW_OK | BOOL | — |
| MEDIA_OK | BOOL | — |
| RATED_LPM | REAL | l/min |
| FLOW_TOL_PCT | REAL | % |
| FLOW_DLY | TIME | — |
| FLOW_GRACE | TIME | — |
| SAMPLE_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| SAMPLED_L | REAL | l |
| TARGET_L | REAL | l |
| PCT_DONE | REAL | % |
| PUMP_CMD | BOOL | — |
| SAMPLING | BOOL | — |
| COMPLETE | BOOL | — |
| SAMPLE_VALID | BOOL | — |
| ALM_FLOW | BOOL | — |
| ALM_TMO | BOOL | — |
| ALM_FLOW_FAULT | BOOL | — |
| ALM_NO_MEDIA | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
VIABLE_SAMPLER_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
- 924
- 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 VIABLE_SAMPLER_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.