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Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual Page 143

Transistorized inverter, high function & low acoustic noise.
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<Set point input calibration>
1. Apply the input voltage of 0% set point setting (e.g. 0V) to across terminals 2-5.
2. Make calibration using Pr. 902. At this time, enter the frequency which should be output by the inverter at
the deviation of 0% (e.g. 0Hz).
3. Apply the voltage of 100% set point setting (e.g. 5V) to across terminals 2-5.
4. Make calibration using Pr. 903. At this time, enter the frequency which should be output by the inverter at
the deviation of 100% (e.g. 60Hz).
<Detector output calibration>
1. Apply the output current of 0% detector setting (e.g. 4mA) to across terminals 4-5.
2. Make calibration using Pr. 904.
3. Apply the output current of 100% detector setting (e.g. 20mA) to across terminals 4-5.
4. Make calibration using Pr. 905.
Note: The frequencies set in Pr. 904 and Pr. 905 should be the same as set in Pr. 902 and Pr. 903. The
results of the above calibration are as shown below:
[Set point setting]
%
100
0
0
Note: 1. If the multi-speed (RH, RM, RL) signal or jog operation (jog) signal is entered with the X14 signal
on, PID control is stopped and multi-speed or jog operation is started.
2. When "20" or "21" is set in Pr. 128, note that the input across inverter terminals 1-5 is added to
the set point across terminals 2-5.
3. When "5" (programmed operation mode) is selected for Pr. 79, PID control operation cannot be
performed. In this setting, programmed operation is performed.
4. When "6" (switch-over mode) is selected for Pr. 79, PID is made invalid.
5. When "9999" is set in Pr. 22, the stall prevention level is the value entered from terminal 1. When
using terminal 1 as the edit input terminal for PID, therefore, set a value other than "9999" in
Pr. 22.
6. When "1" (online auto tuning) is selected for Pr. 95, PID control is made invalid.
7. When the terminal functions are changed using Pr. 180 to Pr. 186 and/or Pr. 190 to Pr. 195, the
other functions may be affected. Confirm the functions of the corresponding terminals before
making settings.
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[Detection value]
%
100
0
5
(V)
0
4
20
130
PARAMETERS
[Manipulated variable]
Manipulated
variable (Hz)
60
0
(mA)
0
100 Deviation (%)

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