Mitsubishi Electric 800 Series Instruction Manual page 90

4.3.4
Changing the frequency (60 Hz, initial value) at
the maximum voltage input (5 V, initial value)
POINT POINT
Change the maximum frequency.
Changing example With a 0 to 5 VDC input frequency setting potentiometer, change the frequency at 5 V from 60 Hz
(initial value) to 50 Hz.
Adjust the setting so that the inverter outputs 50 Hz when 5 V is input. Set "50 Hz" in Pr.125.
Changing the maximum frequency
1.
Set "50.00 Hz" in Pr.125.
Checking the mode/monitor
2.
Press to change to the monitor / frequency monitor.
Start
Turn ON the start switch (STF or STR), then turn the potentiometer (frequency setting potentiometer) clockwise slowly to full.
3.
(Refer to steps 2 and 3 in 4.3.3.)
Operate at 50 Hz.
NOTE
• To set the frequency at 0 V, use the 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.
Parameters referred to
Pr.125 Terminal 2 frequency setting gain frequency
Pr.902 Terminal 2 frequency setting bias frequency
Pr.903 Terminal 2 frequency setting gain
60 Hz
Output frequency
(Hz)
Bias
Pr.902
0
Frequency setting signal
0
0
Pr.902
page 402
page 402
page 402
Basic operation procedure (External operation)
Operation
Initial value
Gain Pr.125 (Pr.903)
100%
5 V
10 V
Pr.903
BASIC OPERATION
4
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