DEADBAND
Report-by-exception deadband: the output follows the input only once it has moved further than the band.
When to use it
Use DEADBAND when a noisy analog value is driving something that costs money to move — a modulating valve, a VFD, an archive tag, a telemetry link — and small fluctuations should not be passed on.
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 |
|---|---|---|
| IN | REAL | eng. units |
| DB | REAL | eng. units |
| IN_OK | BOOL | — |
| RESET | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| OUT | REAL | eng. units |
| CHANGED | BOOL | — |
| VALID | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 8
- Simulated scans
- 76
- 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 DEADBAND — 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.