Mitsubishi Electric MELSEC iQ-F FX5 - Scaling function

35 CPU MODULE BUILT-IN ANALOG FUNCTION
35.4 Functions (Analog Output)
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35
Scaling function
Function that converts user-defined maximum and minimum digital values in accordance with a configured scale.
Corresponding devices
The devices which are used by the scaling function are listed below.
Setting methods
The procedure to use the scaling function is described below.
1. Disable scaling.
2. Set the scaling upper limit value/scaling lower limit value.
The allowable setting range is shown in the following table.
3. Enable scaling.
Operation
Scaling is performed on the resulting value after shift processing is performed on the set digital value using the scaling upper
limit value and scaling lower limit value. The value resulted from scaling is used for D/A conversion.
An example of scaling setting is shown below.
■Calculation method of the scaling value
When using the factory settings for the output range.
Name CH1
Scaling enable/disable setting SM6188
Scaling upper limit value SD6188
Scaling lower limit value SD6189
Name Allowable setting range Default value
Scaling enable/disable setting 0: Enabled 1: Disabled
1: Disabled
Name Allowable setting range Default value
Scaling upper limit value -32768 to +32767
(Upper limit value  Lower limit
value)
0
Scaling lower limit value
246810
[Digital input value]
[Output voltage V]
0
1000
-1000
To use a digital input value
between -1000 to 1000.
Set the upper limit and lower
limit value of scaling.
Value after scaling =
4000
Scaling upper limit value - scaling lower limit value
× (digital input value - scaling lower limit value)