Mitsubishi Electric FR-E800 Instruction Manual page 46

2.6.4 Changing the frequency (initial value: 60 Hz) at the
maximum voltage input (initial value: 5 V)
• Change the maximum frequency.
The following shows the procedure to change the frequency at 5 V from 60 Hz (initial value) to 50 Hz using a frequency setting
potentiometer for 0 to 5 VDC input. Set 50 Hz in Pr.125 so that the inverter outputs 50 Hz at 5 V input.
Operating procedure
1.
Selecting the parameter
Turn the setting dial or press the UP/DOWN key until "P.125" (Pr.125) appears.
Press the SET key to show the present set value (60.00 Hz).
2.
Changing the maximum frequency
Turn the setting dial or press the UP/DOWN key to change the value to "50.00" (50.00 Hz).
Press the SET key to confirm the setting. "50.00" blinks.
3.
Selecting the mode and the monitor item
Press the MODE key twice to select the monitor mode and to monitor a frequency.
4.
Start
Turn ON the start switch (STF/STR signal), and turn the frequency setting potentiometer clockwise slowly to full.
(Refer to steps 2 and 3 in 2.6.3.)
The motor is operated at 50 Hz.
NOTE
• To set the frequency at 0 V, use the calibration parameter C2 (Pr.902).
• Other adjustment methods for the frequency setting voltage gain are the following: adjustment by applying a voltage directly
across terminals 2 and 5, and adjustment using a specified point without applying a voltage across terminals 2 and 5. (Refer
to page 400.)
Parameters referred to
Pr.125 Terminal 2 frequency setting gain
C2(Pr.902) Terminal 2 frequency setting bias
C4(Pr.903) Terminal 2 frequency setting
60Hz
(50Hz)
Output frequency
(Hz)
Bias
C2(Pr.902)
0
0
Frequency setting signal
0
C3(Pr.902)
frequencypage 400
frequencypage 400
gainpage 400
Initial value
Gain Pr.125
100%
5V
10V
C4(Pr.903)
2.6 Basic operation procedure (External operation)
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2. Basic Operation