CHANGEOVER_TIMER
SMED changeover timing from last good part to first good part, with target, best and average tracking.
When to use it
Use CHANGEOVER_TIMER when a line changes SKU or format and the changeover has to be measured the way SMED defines it — from the last saleable part of the outgoing product to the first saleable part of the incoming one — rather than from when the fitters arrived.
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 | — |
| LAST_GOOD | BOOL | — |
| FIRST_GOOD | BOOL | — |
| TARGET_MIN | REAL | min |
| MAX_MIN | REAL | min |
| RESET | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| CHANGEOVER_MIN | REAL | min |
| SMED_TARGET | REAL | min |
| IN_CHANGEOVER | BOOL | — |
| DONE | BOOL | — |
| LAST_MIN | REAL | min |
| BEST_MIN | REAL | min |
| AVG_MIN | REAL | min |
| CO_COUNT | UDINT | — |
| VALID | BOOL | — |
| OVER_TARGET | BOOL | — |
| ALM_STALLED | BOOL | — |
| ALM_ABORTED | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 9
- Simulated scans
- 1047
- 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 CHANGEOVER_TIMER — 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.