Mitsubishi Electric 800 Series Instruction Manual page 407

(T) Multi-Function Input Terminal Parameters
(c) Adjust only frequency without adjustment of gain voltage (current)
(When changing the gain frequency from 60 Hz to 50 Hz)
Parameter selection
Read Pr.125 for terminal 2.
1.
Read Pr.126 for terminal 4.
The present set value is displayed. (60.00 Hz)
Changing the maximum frequency.
2.
Turn to change the set value to "50.00 Hz".
Press [SET] to enter the setting. "50.00 Hz" is set in Pr.125 (Pr.126).
Checking the mode/monitor
3.
Change the status to the monitor mode.
Start
Turn ON the start switch (STF or STR), then turn the potentiometer (frequency setting potentiometer) clockwise slowly to full.
4.
(Refer to steps 2 and 3 in 4.2.3.)
Operate at 50 Hz.
NOTE
• If the frequency meter (display meter) connected across the terminals FM and SD does not indicate exactly 60 Hz, set the
Pr.900 FM terminal calibration. (Refer to
• If the gain and bias of voltage (current) setting voltage are too close, an error (Er3) may be displayed at setting.
• Changing Pr.903 or Pr.905 (gain adjustment) will not change Pr.20.
Input to the terminal 1 (frequency setting auxiliary input) is added to the frequency setting signal.
• For operation outline of the parameter unit (FR-PU07), refer to the Instruction Manual of the FR-PU07.
• To set the value to 120 Hz or higher, the Pr.18 High speed maximum frequency needs to be 120 Hz or higher. (Refer to
page 329.)
• Make the bias frequency setting using the Pr.902 and Pr.904. (Refer to
CAUTION
 Be cautious when setting any value other than "0" as the bias frequency at 0 V (0 mA). Even if a
speed command is not given, simply turning ON the start signal will start the motor at the preset
frequency.
Parameters referred to ???????
Pr.1 Maximum frequency, Pr.18 High speed maximum frequency
Pr.20 Acceleration/deceleration reference frequency
Pr.73 Analog input selection, Pr.267 Terminal 4 input selection
Pr.79 Operation mode selection
Pr.858 Terminal 4 function assignment, Pr.868 Terminal 1 function assignment
406
PARAMETERS
page
page 269
page 393
page 291
Operation
362.)
page 404.)
page 329
page 397