RAMP
Rate-limited setpoint ramp with separate up and down rates, hold, and bumpless tracking preload.
When to use it
Use RAMP when a setpoint must be moved to a new value gradually rather than stepped — heating and cooling a vessel, bringing a chiller or compressor onto load, ramping an EV charger's current limit, starting a pump against a soft-start profile.
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 |
|---|---|---|
| TARGET | REAL | eng. units |
| RATE | REAL | eng. units/s |
| CYCLE | TIME | — |
| DOWN_RATE | REAL | eng. units/s |
| ENABLE | BOOL | — |
| HOLD | BOOL | — |
| TRACK | BOOL | — |
| TRACK_VAL | REAL | eng. units |
Outputs
| Port | Type | Unit |
|---|---|---|
| OUT | REAL | eng. units |
| DONE | BOOL | — |
| RAMPING | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 8
- Simulated scans
- 754
- 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 RAMP — 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.