Mitsubishi Electric MELSEC iQ-R Series User Manual page 26

Calculating the scaling value
The scale conversion is based on the following formulae. (In scale conversion, values are rounded off to the nearest whole
number.)
The calculation formula for a scaling value varies depending on the relationship of a scaling range upper limit value and
scaling range lower limit value.
• For scaling range lower limit value < scaling range upper limit value
Relational expression
D = D
L
(for T < T )
L
(D - D ) × (T - T )
H L L
+ D
(T - T )
H L
 T  T
(for T )
L H
D = D
H
(for T > T )
H
• For scaling range lower limit value > scaling range upper limit value
Relational expression
D = D
H
(for T < T )
H
(D - D ) × (T - T )
L H H
+ D
(T - T )
L H
 T  T
(for T )
H L
D = D
L
(for T > T )
L
Setting procedure
1.
Set "Scaling enable/disable setting" to "Enable".
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Application setting]  [Scaling
function]
2.
Set values for "Scaling range upper limit value" and "Scaling range lower limit value".
Item
Scaling range upper limit value
Scaling range lower limit value
3.
Set values for "Scaling width upper limit value" and "Scaling width lower limit value".
Item
Scaling width upper limit value
Scaling width lower limit value
• Set different values for "Scaling range upper limit value" and "Scaling range lower limit value". If same
values are set, a scaling setting range error (error code: 1A3H) occurs.
• Set different values for "Scaling width upper limit value" and "Scaling width lower limit value". If same values
are set, a scaling setting range error (error code: 1A3H) occurs.
1 FUNCTIONS
24
1.5 Scaling Function
Element
T: Measured temperature value
D: Scaling value
T : Scaling range lower limit value
L
T : Scaling range upper limit value
H
L
D : Scaling width lower limit value
L
D : Scaling width upper limit value
H
Element
T: Measured temperature value
D: Scaling value
T : Scaling range lower limit value
L
T : Scaling range upper limit value
H
H
D : Scaling width lower limit value
L
D : Scaling width upper limit value
H
Conceptual graph
D
D
H
D
L
Conceptual graph
D
D
H
D
L
Setting range
-3276.8 to 3276.7 ()
Setting range
-32768 to 32767
T T
L H
T T
H L
T
T