Panasonic FP Series User Manual

Arithmetic instructions
472
Part III FP Instructions
F283_DSCAL
Linearization of 32-bit data
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.
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
 etc.
PLC types
Availability of F283_DSCAL (see page 1323)
Variable Data type Function
x DINT Input value x
xy_data DUT The first element of a DUT-type variable that contains the xy
value pairs.
y DINT Output value y
EN BOOL Activation of the function (when EN = TRUE, the function is
executed during each PLC cycle)
ENO BOOL ENO is set to TRUE as soon the function is executed.
Helpful when cascading function blocks with EN functions.
For Relay T/C Register Constant
x WX WY WR WL SV EV DT LD FL dec. or hex.
y - WY WR WL SV EV DT LD FL -
Description
The function renders the value y at position x by performing a linear interpolation based on the
neighboring reference points Pw(xw, yw) and Pw+1(xw+1, yw+1). In this example, w is the
nearest 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 s.
Data types
Operands

Panasonic FP Series Specifications

General

Mounting	DIN rail
Type	PLC
Communication Interface	RS-232, RS-485, Ethernet (depending on model)
Input Voltage	100-240V AC or 24V DC (depending on model)
Output Type	Relay, Transistor
I/O Points	Varies by model
Operating Temperature	0°C to 55°C
Dimensions	Varies by model
Weight	Varies by model