OEE_CALC
Overall Equipment Effectiveness — availability, performance and quality with guarded denominators and an explicit validity bit.
When to use it
Use OEE_CALC when a line's planned time, running time, ideal rate and part counts are available in the PLC, and OEE has to be published live to an andon or a historian without the shift-start and line-down cases reporting nonsense.
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 | — |
| RUN_T | TIME | — |
| PLAN_T | TIME | — |
| IDEAL_RATE | REAL | parts/min |
| TOTAL | UDINT | — |
| GOOD | UDINT | — |
| DATA_OK | BOOL | — |
| MIN_RUN | TIME | — |
| RATE_TOL | REAL | fraction |
| OEE_LO | REAL | fraction |
| OEE_DB | REAL | fraction |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| AVAIL | REAL | fraction |
| PERF | REAL | fraction |
| QUAL | REAL | fraction |
| OEE | REAL | fraction |
| VALID | BOOL | — |
| ALM_NO_PLAN | BOOL | — |
| ALM_NO_RUN | BOOL | — |
| ALM_RATE_CFG | BOOL | — |
| ALM_COUNT_ERR | BOOL | — |
| ALM_OEE_LOW | BOOL | — |
| ALM_DATA_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
OEE_CALC 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
- 8
- Simulated scans
- 52
- 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 OEE_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.
Every block in the catalogue is free to download, in every format, 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.