Installation manual

Publication 1747-RM001G-EN-P - November 2008
Math Instructions 4-19
Notice that an overflow occurred even though the final value was correct. This
happens because the overflow condition occurred during the rate calculation.
The following graph shows the shifted linear relationship. The input minimum
value of 3,277 is subtracted from the input maximum value of 16,384, resulting
in the value of 13,107.
Calculating the Shifted Linear Relationship
Use the following equations to calculate the scaled units.
32,764 10V
(Scaled MAX.)
Scaled Value
0 0V
(Scaled MIN.)
0 4 mA
(Shifted Input MIN.)
Input Value
13,107 20 mA
(Shifted Input MAX.)
Scaled value (Input Value Rate)× offset+=
Rate
Scaled MAX. Scaled MIN.–
Input MAX. Input MIN.–
-------------------------------------------------------------------------=
32 764,0–
13 107,0–
-----------------------------
2.4997 (or 24,997/10000=
Offset Scaled MIN. (Input MIN. Rate)×–=
0 0 2.4997×()0=–