Instruction manual
Table Of Contents
- SAFETY INSTRUCTIONS
- CONTENTS
- CHAPTER 1 OUTLINE
- CHAPTER 2 INSTALLATION AND WIRING
- CHAPTER 3 OPERATION/CONTROL
- CHAPTER 4 PARAMETERS
- CHAPTER 5 PROTECTIVE FUNCTIONS
- 5.1 Errors (Alarms)
- 5.2 Troubleshooting
- 5.2.1 Motor remains stopped.
- 5.2.2 Motor rotates in opposite direction.
- 5.2.3 Speed greatly differs from the setting.
- 5.2.4 Acceleration/deceleration is not smooth.
- 5.2.5 Motor current is large.
- 5.2.6 Speed does not increase.
- 5.2.7 Speed varies during operation.
- 5.2.8 Operation mode is not changed properly.
- 5.2.9 Operation panel (FR-DU04) display is not provided.
- 5.2.10 POWER lamp is not lit.
- 5.2.11Parameter write cannot be performed
- 5.3 Precautions for Maintenance and Inspection
- CHAPTER 6 SPECIFICATIONS
- CHAPTER 7 OPTIONS
- APPENDICES
- REVISIONS
PARAMETERS
88
z
zz
z PWM carrier frequency (Pr. 72, Pr. 240)
Pr. 72 "PWM frequency selection"
Pr. 240 "Soft-PWM setting"
You can change the motor tone.
z By parameter setting, you can select Soft-PWM control which changes the motor tone.
z Soft-PWM control changes motor noise from a metallic tone into an unoffending complex tone.
Parameter
Number
Factory
Setting
Setting Range Remarks
72 2 0 to 15 0: 0.7kHz, 15: 14.5kHz
240 1 0, 1 1: Soft-PWM valid
<Setting>
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Refer to the following list and set the parameters:
Parameter
Number
Factory Setting Description
72 0 to 15
PWM carrier frequency can be changed.
The setting displayed is in [kHz]. Note that 0 indicates 0.7kHz and 15 indicates 14.5kHz.
0
Soft-PWM invalid
240
1
When any of "0 to 5" is set in Pr. 72, Soft-PWM is made valid.
Note: 1. A reduced PWM carrier frequency will decrease inverter-generated noise and leakage current but
increase motor noise.
2. If the PWM carrier frequency is increased to make noise low, continuous operation performed at
more than the rated torque may generate motor noise, but it is not a failure.
3. When using Variable Torque Rating, maximum carrier frequency is 8KHz. (Setting: 8)