Scaling Function - Mitsubishi MELSEC-L Series User Manual

8.8

Scaling Function

Performs scale conversion on the digital values that are output. The values are converted in the range between the
scaling upper limit value and the scaling lower limit value.
The converted values are stored to CH
(1) If the input range is set to the factory default setting
If the input range is set to -10V to 10V:
Ex.
For the scaling lower limit value, set it to a value corresponding to the lower limit of the input range (-20000),
and for the scaling upper limit value, set it to a value corresponding to the upper limit of the input range
(20000).
(2) Calculation of the scaling value
(a) If the factory default setting is used for the input range
• When the voltage and current are as follows:
Voltage: 0V to 10V, 0V to 5V, 1V to 5V
Current: 0mA to 20mA, 4mA to 20mA
• When voltage is -10V to 10V
• Dx : Digital output value
• D : Maximum digital output value of the input range used
Max
• D : Minimum digital output value of the input range used
Min
• S : Scaling upper limit value
H
• S : Scaling lower limit value
L
Scaling value (Un\G54 to Un\G57).
D (S
X
Scaling value =
D
Max
D (S
X
Scaling value =
D - D
Max
- S )
H L
+ S
L
- S )
(S + S )
H L H L
+
Min
2
CHAPTER 8 FUNCTIONS
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