Scaling Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.5

Scaling Function

A temperature input module performs scale conversion from a measured temperature value to a value calculated using the
ratio (%) of the set scaling width to the set scaling range. The converted value is stored in the buffer memory area. The
calculation of a value is performed using a scaling range upper limit value, scaling range lower limit value, scaling width upper
limit value, and scaling width lower limit value, all of which are set arbitrarily.
The value after the scale conversion is stored in 'CH1 Scaling value' (Un\G402).
Concept of scaling setting
The concepts of each setting item are described below.
■Scaling range upper limit value, scaling range lower limit value
Set the upper and lower limit values of a measured temperature value to be scale converted. Set the values in increments of
0.1.
Ex.
When 5000 (500.0) is set in Scaling range upper limit value and -1000 (-100.0) is set in Scaling range lower limit value, a
measured temperature value between -100.0 and 500.0 are scale converted. If a value greater than 500.0 or smaller than
-100.0 is set, a value set in Scaling width upper limit value or Scaling width lower limit value is stored in 'CH1 Scaling value'
(Un\G402).
■Scaling width upper limit value, scaling width lower limit value
Set the range of a measured temperature value after scale conversion. A value within this range is stored in 'CH1 Scaling
value' (Un\G402).
• For Scaling width upper limit value, set a value corresponding to the scaling range upper limit value of the measured
temperature value.
• For Scaling width lower limit value, set a value corresponding to the scaling range lower limit value of the measured
temperature value.
Ex.
The scaling value with the following conditions
• A value of 5000 (500.0) is set in Scaling range upper limit value, and -1000 (-100.0) is set in Scaling range lower limit
value.
• A value of 100 is set in Scaling width upper limit value, and 0 is set in Scaling width lower limit value.
When a measured temperature value is 5000 (500.0), 100 is stored in 'CH1 Scaling value' (Un\G402). And when a
measured temperature value is -1000 (-100.0), 0 is stored.
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1.5 Scaling Function
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