Panasonic FP Series Programming Manual page 470

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The function renders the value y at position x by performing a linear interpolation based on the

neighboring reference points Pw

reference point whose x value is smaller than the input value x, i.e. the function connects the

individual reference points in series and renders the output value y based on the input value x.

The function can be used for:

linearizing measured values, e.g. with non-linear sensors

rendering a heater's flow temperature y in relation to the outside temperature x

This instruction also exists as a P instruction (for FP2/2SH, FP3/5, FP10/10SH PLC types), which

is only executed at the rising edge of the EN trigger. Select [Insert P instruction] from the

"Instructions" pane if you require a P instruction. To facilitate reuse, the instruction then appears

under "Recently used" in the pop-up menu. Press <Ctrl>+<Shift>+<v> within the programming

area to open the list of recently used elements.

Availability of F282_SCAL (see page 1323)

Linearization of 16-bit data

Input value x

The first element of an DUT-type variable that contains the

xy value pairs.

Output value y

Activation of the function (when EN = TRUE, the function is

executed during each PLC cycle)

ENO is set to TRUE as soon the function is executed.

Helpful when cascading function blocks with EN functions.

for an instant

. In this example, w is the nearest

(xw+1, yw+1)

 the number of reference points is not

between 2 ... 100, or the x values are not

in ascending order (x1 < x2 < x3 < ...).

Arithmetic instructions

dec. or hex.