VFD Speed Ref
medium
Clamps an operator percent setpoint to 0-100 and scales it for a VFD configured to accept a 0-32767 raw speed reference.
What it teaches
Composition: clamp, then scale. The percent arrives from an HMI and can be outside 0-100, while this drive interface is configured for 0-32767 raw counts. Pin the input to its valid range first, then scale it to the configured DINT reference.
Inputs and outputs
| Tag | Type | Default | Description |
|---|---|---|---|
| In_Percent | REAL | 50 | Operator percent speed reference from HMI |
| Out_SpeedRef | DINT | — | Raw speed reference for a VFD configured for 0-32767 |
Required behavior
- Out_SpeedRef is clamped to 0 when In_Percent is less than or equal to 0.
- Out_SpeedRef is clamped to 32767 when In_Percent is greater than or equal to 100.
- Out_SpeedRef scales linearly between 0 and 32767 for In_Percent values between 0 and 100, rounded to the nearest whole number.