Mitsubishi Electric 800 Series Instruction Manual page 270

 Setting example
• The load characteristics are calculated from the parameter setting and the output frequency.
• A setting example is shown below. The reference value is linearly interpolated from the parameter settings. For example,
the reference when the output frequency is 30 Hz is 26%, which is linearly interpolated from values of the reference 2 and
the reference 3.
Reference
Load characteristics f1: load characteristics minimum frequency (Pr.1487) = 10 Hz
reference 1
Load characteristics f2 = (f5 - f1)/4 + f1 = 22.5 Hz
reference 2
Load characteristics f3 = (f5 - f1)/2 + f1 = 35 Hz
reference 3
f4 = (f5 - f1)  3/4 + f1 = 47.5 Hz
Load characteristics
reference 4
Load characteristics f5: load characteristics maximum frequency (Pr.1486) = 60 Hz
reference 5
Load(%)
26
NOTE
• When the load reference is not set for five points, the load characteristics value is determined by linear interpolation of the
set load reference values only. If there is only one load reference setting, the set load reference is used as the load
reference all through the range.
Parameters referred to
Pr.41 Up-to-frequency sensitivity
Pr.190 to Pr.196 (Output terminal function selection)
Frequency
120
100
80
60
40
20
0
0 10 20 30
page 305
page 297
Pr.1481 = 15%
Pr.1482 = 20%
Pr.1483 = 30%
Pr.1484 = 60%
Pr.1485 = 100%
40 50 60 70
Frequency(Hz)
Load reference
5. PARAMETERS
5.7 (H) Protective function parameter
3
4
5
5
5
6
7
8
9
10
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