UT_SCALE — Linear scaling (function)

Quick scaling with no record. For a full analog input with fault handling, use UT_ANALOG_IN.

Pins

	Pin	Type	Default	What to wire
in	`In`	REAL	0.0	The value to scale (a raw count, mA, ...)
in	`InMin` / `InMax`	REAL	0.0 / 65535.0	Input values that give `OutMin` / `OutMax`
in	`OutMin` / `OutMax`	REAL	0.0 / 100.0	Engineering range. Swap them to invert
in	`Clamp`	BOOL	TRUE	TRUE: stay within `OutMin`..`OutMax`. FALSE: the line carries on past the ends
returns		REAL		Scaled value

A straight line from (InMin, OutMin) to (InMax, OutMax). Either range can
run backwards (for example InMin := 20.0, InMax := 4.0).

Case	Result
`InMin = InMax` (zero span)	`OutMin`, whatever `In` is
`OutMin = OutMax`	That value
`In` is NaN, or any setting is NaN	NaN (a not-a-number in gives a not-a-number out)
`In` is infinite	The end value when clamped; infinity when not

The maths runs in LREAL, so even ranges near the REAL limits do not overflow.

Pressure := UT_SCALE(In := INT_TO_REAL(%IW0), InMin := 0.0, InMax := 27648.0,
                     OutMin := 0.0, OutMax := 10.0);   (* 0-10 bar *)