Access to parameters according to the password status ○: Enabled, Ч: Disabled *1 All parameter clear cannot be performed during the inverter operation. *2 Inputting a password is possible but the locked-up password cannot be unlocked or reset even with the valid password. • When "4, 5, 104, or 105" is set in Pr.296 and a password is set, Pr.15 JOG frequency is not listed on the parameter unit (FR- PU07). • When a password has been set and parameters are locked, Parameter copy cannot be performed using the operation panel or parameter unit.
Pr.77 Parameter write selection page 89 Pr.551 PU mode operation command source selection page 105 5.3.9 PWM carrier frequency and Soft-PWM control The motor sound can be changed. Changing the PWM carrier frequency (Pr.72) • The PWM carrier frequency of the inverter can be changed. • Changing the PWM carrier frequency can be effective for avoiding the resonance frequency of the mechanical system or motor, as a countermeasure against EMI generated from the inverter, or for reducing leakage current caused by PWM switching. Soft-PWM control (Pr.240) • Soft-PWM control is a function that changes the motor noise from a metallic sound into an inoffensive, complex tone.
• Setting Pr.240 "10 or 11" enables the Soft-PWM control in the low-speed range. • Setting Pr.240 = "1 or 11" enables the Soft-PWM control. • To enable the Soft-PWM control, set Pr.72 to 5 kHz or less. 92 5.
PARAMETERS 5.3 (E) Environment setting parameters Parameter Password protection disabled / Parameters unlocked Parameters locked Password locked up Pr.296 = 9999 Pr.297 = 9999 (read only) Pr.296 ≠ 9999 Pr.297 = 9999 (read only) Pr.296 ≠ 9999 Pr.297 = any of 0 to 4 (read only) Pr.296 = any of 101 to 106 Pr.297 = 5 (read only) Pr.296 Read ○ ○ ○ ○ Write ○ ○ × × Pr.297 Read ○ ○ ○ ○ Write × ○ ○ ○*2 Pr.CLR Parameter clear (Write) ○ ○ × × ALL.C All parameter clear (Write) ○ ○ ○*1 ○*1 Pr.CPY Parameter copy (Write) ○ ○ × × NOTE Parameters referred to Pr. Name Initial value Setting range Description 72 E600 PWM frequency selection 2 2 to 12 The PWM carrier frequency can be changed.
The setting value represents the frequency in kHz. 240 E601 Soft-PWM operation selection 1 0 Soft-PWM control disabled. 1 Soft-PWM control enabled. 10 Soft-PWM control disabled (Soft-PWM control in the low-speed range enabled). 11 Soft-PWM control enabled (Soft-PWM control in the low-speed range enabled).