Mitsubishi Electric FR-F800 Instruction Manual page 259

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(H) Protective function parameter
NOTE
• Changing the terminal assignment using Pr.190 to Pr.196 (output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
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
Load characteristics
f4 = (f5 - f1)×3/4 + f1 = 47.5 Hz
reference 4
Load characteristics
f5: load characteristics maximum frequency (Pr.1486) = 60 Hz
reference 5
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)
258
PARAMETERS
Frequency
Load(%)
120
100
80
60
40
26
20
0
0
10
20
page 294
page 288
30
40
50
60
Load reference
Pr.1481 = 15%
Pr.1482 = 20%
Pr.1483 = 30%
Pr.1484 = 60%
Pr.1485 = 100%
70
Frequency(Hz)

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