CLAMP
Clamps the input process variable to the range IPmin to IPmax.
OUT = Min(Max(PV, IPmin), IPmax)
Parameter values for the CLAMP function block:
Parameter | Data Type | Description |
|---|---|---|
IPmin | REAL | Minimum input range parameter. Infinity or Not a Number (NaN) values are not supported by this input. |
PV | REAL | Process variable having a REAL value |
IPmax | REAL | Maximum input range parameter. Infinity or Not a Number (NaN) values are not supported by this input. |
OUT | REAL | When PV is < IPmin or > IPmax, sets the IPmin or IPmax value respectively. When PV is within range, sets to PV. |
LIMIT | BOOL | TRUE when clamped, that is, LIMIT = (PV < IPmin) or (PV > IPmax) FALSE when PV is within range of IPmin and IPmax. |
When IPmax < IPmin, the function block assumes that the values are reversed and swaps them. The
ERRSTAT
Reversed error counter increments each time the function swaps the parameters.When PV is Not a Number (NaN) value, OUT sets to IPmin, LIMIT to FALSE and the
ERRSTAT
Param error counter increments.Function Block Diagram Example
Structured Text Example
CLAMP(MinValue, Input, Maxvalue); OutValue := CLAMP.OUT; Result := CLAMP.LIMIT;
Provide Feedback