Mitsubishi Electric FR-D720-008 Instruction Manual page 159

(c) Adjusting only the frequency without adjusting the gain voltage (current).
(When changing the gain frequency from 60Hz to 50Hz)
Operation
1.
Turn until (Pr. 125) or
(Pr. 126) appears
2.
Press to show the present set value.
(60.00Hz)
3.
Turn to change the set value to
" ". (50.00Hz)
4.
Press to set.
5.
Mode/monitor check
Press twice to choose the monitor/
frequency monitor.
6.
Apply a voltage across the inverter terminals 2-
5 (across 4-5) and turn on the start command
(STF, STR).
Operation starts at 50Hz.
REMARKS
Changing C4 (Pr. 903) or C7 (Pr. 905) (gain adjustment) value will not change the Pr. 20 value.
For operation from the parameter unit (FR-PU04/FR-PU07), refer to the instruction manual of the FR-PU04/FR-PU07.
When setting the value to 120Hz or more, it is necessary to set Pr. 18 High speed maximum frequency to 120Hz or more. (Refer to
page 81)
Make the bias frequency setting using the calibration parameter C2 (Pr. 902) or C5 (Pr. 904). (Refer to page 152)
Be cautious when setting any value other than "0" as the bias frequency at 0V (0mA). Even if a speed
command is not given, merely turning on the start signal will start the motor at the preset frequency.
Parameters referred to
Pr. 20 Acceleration/deceleration reference frequency
Pr. 73 Analog input selection, Pr. 267 Terminal 4 input selection
Pr. 79 Operation mode selection
Bias and gain of built-in frequency setting potentiometer
Frequency setting by analog input (terminal 2, 4)
Terminal 2 input
is selected
Flicker...Parameter setting complete!!
CAUTION
Refer to page 94
Refer to page 148
Refer to page 163
Refer to page 244
Display
or
Terminal 4 input is
selected
Terminal 2 input is Terminal 4 input is
selected selected
4
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