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Start and stop using terminals (External operation)
5
5.2.4 Operating at 60Hz or higher using the external potentiometer
< How to change the maximum frequency>
Changing
example
When you want to use 0 to 5VDC input frequency setting potentiometer to change the frequency at 5V from 60Hz (initial value)
to 70Hz, make adjustment to output "70Hz" at 5V voltage input. Set "70Hz" in Pr. 125.
Operation
1.
Parameter selection
Turn until " " (Pr. 125) appears.
Press to show the present set value " " (60.00Hz).
2.
Changing the maximum frequency
Turn to change the set value to " "(70.00Hz).
Press to enter. " " and " " flicker alternately.
3.
Mode/monitor check
Press
twice to choose the monitor/frequency monitor.
4.
Start
Turn the start switch (STF or STR) ON.
[RUN] flickers fast because the frequency command is not given.
5.
Acceleration constant speed
Turn the potentiometer (frequency setting potentiometer) clockwise slowly to full.
The frequency value on the display increases in Pr. 7 Acceleration time, and " " (70.00Hz) appears.
[RUN] indicator is lit during forward rotation operation and flickers slowly during reverse rotation operation.
6.
Deceleration
Turn the potentiometer (frequency setting potentiometer) counterclockwise slowly to full.
The frequency value on the
display
decreases in
Pr. 8 Deceleration time
,
and the motor stops running with " " (0.00Hz)
displayed
.
[RUN] flickers fast.
7.
Stop
Turn the start switch (STF or STR) OFF.
[RUN] turns OFF.
REMARKS
To change the value to 120Hz or more, the maximum frequency must be set to 120Hz or more.
Use calibration parameter C2 to set frequency at 0V and
calibration parameter C0 to adjust the meter.
(
Refer to Chapter 4 of the Instruction Manual (Applied)).
As other adjustment methods of frequency setting voltage gain, there are methods to adjust with a voltage applied to across
terminals 2 and 5 and a method to adjust at any point without a voltage applied. ( Refer to Chapter 4 of the Instruction Manual
(Applied) for the setting method of calibration parameter C4.)
Initial value
Bias
C2 (Pr. 902)
0
0
Frequency
setting signal
100%
10V
05V
C3 (Pr. 902) C4 (Pr. 903)
Gain
Pr. 125
Output
frequency
(Hz)
60Hz