Scaling attributes

Enable I/O scaling

Scaled

Used to enable scaling between the raw value and the EU value.

None

Raw value - Minimum

RawMin

The raw input minimum to be used in the scaling calculation.

Supervisory, User

Raw value - Maximum

RawMax

The raw input maximum to be used in the scaling calculation.

Supervisory, User

EU value - Minimum

EngUnitsMin

The minimum value, in engineering units, used in the scaling calculation.

Supervisory, User

EU value - Maximum

EngUnitsMax

The maximum value, in engineering units, used in the scaling calculation.

Supervisory, User

EU range value - Minimum

EngUnitsRangeMin

The lowest allowed scaled value for the Attribute before it is clamped, if clamping is enabled. This value must be less than or equal to the specified minimum engineering unit value.

EngUnitsRangeMin is not configurable with square root conversion mode selected, and is set equal to the EngUnitsMin attribute.

If the returned value is less than the value set for EngUnitsMin:

• If NOT clamped, the value is reported with BAD quality.

• If clamped, the value will equal EngUnitsRangeMin with Uncertain quality.

Supervisory, User

EU range value - Maximum

EngUnitsRangeMax

The highest allowed scaled value for the Attribute before it is clamped, if clamping is enabled. This value must be greater than or equal to the specified maximum engineering unit value.

With square root conversion mode selected, EngUnitsRangeMax is not configurable and is set equal to the EngUnitsMax attribute.

If the returned value is greater than the value set for EngUnitsMax:

• If NOT clamped, the value is reported with BAD quality.

• If clamped, the value will equal EngUnitsRangeMax with Uncertain quality.

Supervisory, User

Conversion mode

ConversionMode

Used to specify either Linear or Square root for the equation that will be used to scale the input

If Square root is selected, the raw value is clamped to the MinRaw and MaxRaw value range before the Square root conversion is executed.

The Quality will be set to the following: BAD quality if the raw value has BAD quality, to INITIALIZING quality if the raw value has INITIALIZING quality, and to GOOD quality otherwise.

Read-Only

Clamp input to EU range

ClampEnabled

Used to allow the scaling process to clamp the engineering unit result.

If clamping is enabled, the scaling calculation result is clamped at either the maximum engineering unit range value or the minimum engineering unit range value, and the Field Attribute quality is set to UNCERTAIN.

If not clamped, and the Field Attribute value exceeds the engineering unit range, then the value will continue to scale out of range, and the quality is set to BAD.

If Square root conversion is selected, ClampEnabled is not configurable.

Supervisory, User