QA_SCALED
Analog output scaling — engineering units to raw counts, clamped to the card's range.
When to use it
Use QA_SCALED when a control output in engineering units (%, rpm, mA setpoint) has to drive a raw analog channel, and a value outside the range must be limited rather than wrapped.
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 |
|---|---|---|
| PARAMS | STRING | — |
| VALUE | REAL | EU |
| EU_MIN | REAL | EU |
| EU_MAX | REAL | EU |
| RAW_MIN | REAL | counts |
| RAW_MAX | REAL | counts |
| HOLD | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| RAW | REAL | counts |
| LIMITED | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 6
- Simulated scans
- 14
- 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 QA_SCALED — 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.