6. Function blocks
6.1 Manufacturer function blocks
6.1.3.5 LS - Value scaling
General
easyE4 base devices provide 32 value scaling function blocks,
LS01 through LS32.
These function blocks can be used to transfer values from
one value range to another. More specifically, a value scaling
function block will take one of the mathematical relationships
you have specified and use it to scale the value at input LS..I1
in order to then output it, either as smaller value or larger
value, at output LS..QV. The mathematical relationship is
based on a straight line defined by the coordinate pairs X1, Y1
and X2, Y2 (see under “The mathematical relationship is:”).
A typical application is for the conversion of values for 0…20
mA in 4…20 mA.
Operating principle
"EN=1" starts the function block.
"EN=0" initiates a reset in which the output QV is reset to 0.
Fig. 184: Figure: Scaling the input values - reducing
Source range
Destination range
Fig. 185: Scaling the input values - increasing
easyE402/24 MN050009ENEaton.com
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