LIN10P (10-Point Linearization Block Documentation)

Overview

The LIN10P block is a functional component used in industrial automation systems to convert non-linear analog inputs into linearized outputs using a predefined set of reference (X, Y) points. It enables improved accuracy for devices such as pressure, level, or flow transmitters that exhibit non-linear characteristics.

• The logic performs piecewise linear interpolation using up to 10 configurable (X, Y) pairs.
• It significantly improves measurement accuracy, simplifies control logic, and enhances system stability and reliability.
• LIN10P is especially useful where high-precision scaling of sensor data is needed prior to display or control action.

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Logic Block Illustration

The FB_LIN10P block provides a clear method to linearize raw analog input from field instruments.

A visual representation of the LIN10P logic block in the programming environment.

The above image illustrates how to connect the LIN10P block within logic for input signal scaling.

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Pins Information

Signal	Type	Description
Input	REAL	The raw process value to be linearized.
InPoint	ARRAY[1..10] OF REAL	X-axis reference points (raw sensor values). Must be in ascending order.
OutPoint	ARRAY[1..10] OF REAL	Y-axis scaled output values corresponding to each InPoint.
Output	REAL	Interpolated and scaled output value.
Valid	BOOL	TRUE if valid interpolation is performed (i.e., at least 2 valid points).

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Operational Summary

• The block checks where the Input value lies between any two adjacent InPoint values.
• It then performs linear interpolation using the corresponding OutPoint values.
• If input falls outside the configured range or fewer than two points are valid, the output is marked invalid via the Valid bit.
• This block has no faceplate. It is typically used internally with other logic and analog scaling blocks.

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Example Use Cases

• Converting a non-linear tank level (mm) to actual volume (liters).
• Compensating for non-linearity in differential pressure-based flow measurement.
• Custom calibration curves for unusual sensors.

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Training Demo Video

Demonstration video is available , How to use the Daca Logic Block through Library:

LIN10P Block Demo - TPW Logic Setup

Best Practices

• Ensure InPoint values are strictly increasing (ascending) to prevent logic errors.
• Do not use duplicate X-values in InPoint array.
• Always check Valid output before using Output in downstream logic.

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Tip:
This block is ideal for compensating non-linear device behavior in critical process loops where precision and repeatability are essential.