B&B Electronics VFG3000 - Manual - Manual (Page 338)

S CALE ( DATA , R 1, R 2, E 1, E 2) V LINX F IELDBUS G ATEWAY M ANAGER U SER M ANUAL
P AGE 322
S
CALE
(
DATA
,
R 1 ,
R 2 ,
E 1 ,
E 2 )
A RGUMENT T YPE D ESCRIPTION
data int The value to be scaled.
r1 int The minimum raw value stored in data..
r2 int The maximum raw value stored in data..
e1 int The engineering value corresponding to r1.
e2 int The engineering value corresponding to r2.
D ESCRIPTION
This function linearly scales the data argument, assuming it to contain values between r1
and r2 , and producing a return value between e1 and e2 . The internal math is implemented
using 64-bit integers, thereby avoiding the overflows that might result if you attempted to
scale very large values using Fieldbus Gateway Manager’s own math operators.
F UNCTION T YPE
This function is passive.
R ETURN T YPE
int.
E
XAMPLE
Data := Scale([D100], 0, 4095, 0, 99999)