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AVEVA™ Operations Management Interface

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Scaling

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  • Last UpdatedApr 13, 2016
  • 1 minute read

When the Attribute is set to NaN, the scaling attribute is not calculated and the quality of the scaling value will remain GOOD.

For linear scaling, the following equation is used:

  • ScaledValue = ((RawValue-RawMin)/(RawMax-RawMin) * (EngUnitsMax-EngUnitsMin)) + EngUnitsMin

For square root scaling, the following equation is used:

  • ScaledValue = sqrt((RawValue-RawMin)/(RawMax-RawMin))

  • If RawValue < RawMin, then ScaledValue = (sqrt(RawMin) * (EngUnitsMax-EngUnitsMin)) + EngUnitsMin

On failover, all calculated scaling values are maintained and the quality is set to UNCERTAIN.

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