Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 348

Calculating the scaling value
The scale value conversion is based on the following formula. (In scale conversion, values are rounded off to the nearest
whole number.)
The calculation formula for a scaling value varies depending on the input type/range.
Input type/Range
• Current (0 to 20 mA, 4 to 20 mA)
• Voltage (0 to 10 V, 0 to 5 V, 1 to 5 V)
• Current (-20 to +20 mA)
• Voltage ( -10 to +10 V)
• Resistance temperature detector
• Thermocouple
Setting procedure
1.
Set "Scaling enable/disable setting" to "Enable".
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Module Parameter] 
[Application setting]  [Scaling function]
2.
Set values for "Scaling upper limit value" and "Scaling lower limit value".
Item
Scaling upper limit value
Scaling lower limit value
• Even when the scaling upper limit value and the scaling lower limit value are set so that the change is
greater than the resolution, the resolution will not increase.
• If the relation between the values is the scaling lower limit value > the scaling upper limit value, the scale
conversion can be performed according to a negative slope.
• Set the scaling with the condition "Scaling upper limit value  Scaling lower limit value".
3 FX5-8AD
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3.4 Functions
Relational expression
D × (S - S )
x H L
+ S
L
DMax
D × (S - S ) (S + S )
x H L H L
+
(DMax - DMin) 2
(D - DMin) × (S - S )
x H L
+ S
L
(DMax - DMin)
Setting range
-32000 to +32000
Element
D : Digital output value
x
DMax: Maximum digital output value of the input range in use
DMin: Minimum digital output value of the input range in use
S : Scaling upper limit value
H
S : Scaling lower limit value
L