ALLERGEN_CHANGEOVER
Allergen changeover release: works out which allergens are actually being carried over, then withholds the line until clearance, cleaning, a signed visual and a fresh passing ATP swab have all been PROVEN.
When to use it
Use ALLERGEN_CHANGEOVER when a filling, mixing, coating or packing line runs more than one recipe and the next product does not declare every allergen the last one contained, so the line may not be released until the allergen barrier has been verified rather than merely timed.
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 | — |
| PREV_ALLERGEN | BYTE | — |
| NEXT_ALLERGEN | BYTE | — |
| LINE_CLEARED | BOOL | — |
| CLEAN_START | BOOL | — |
| CLEAN_DONE | BOOL | — |
| VISUAL_OK | BOOL | — |
| INSPECTOR_REF | STRING | — |
| ATP_PV | REAL | RLU |
| ATP_LIM | REAL | RLU |
| ATP_OK | BOOL | — |
| ATP_NEW | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| SWITCH_OK | BOOL | — |
| CLEAN_REQ | BOOL | — |
| CARRYOVER | BYTE | — |
| HOLD_CODE | USINT | — |
| CLEAN_ARMED | BOOL | — |
| ATP_RESULT | REAL | RLU |
| ATP_PASS | BOOL | — |
| ALM_ATP_FAIL | BOOL | — |
| ALM_SWAB_REFUSED | BOOL | — |
| ALM_PAIR_CHANGED | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 12
- Simulated scans
- 139
- 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
Download ALLERGEN_CHANGEOVER — 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 and the datasheet.
Every block in the catalogue is free to download, in every format it ships, with no purchase and no card. Browsing needs no account at all; downloading needs a signed-in one, so the block lands in your library and re-downloads whenever you need it.
Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.