Delta Electronics VFD-M Series User Manual page 87

Chapter 4 Parameters|
Carrier Frequency
1KHz
15KHz
From the above table, we see that the carrier frequency of PWM output has a significant
influence on the electromagnetic noise, heat dissipation of the AC drive, and the acoustic
noise to the motor.
Pr.72
Auto Restart Attempts After Fault
Settings 00 to 10
When this parameter is enabled (set different to zero), the AC Drive will restart/reset
automatically up to 10 times after the occurrence of certain type of faults (over-current OC,
over-voltage OV). If enabled, the AC drive will restart on "speed search", which begins at
Master Frequency. Setting this parameter to 0 will disable this operation. To set the fault
recovery time after a fault, please see base-block time for speed search (Pr.34).
Pr.73
Present Fault Record
Pr.74
Second Most Recent Fault Record
Pr.75
Third Most Recent Fault Record
Settings 00
01
02
03
04
05
06
07
08
09
10
11
12
4-52
Acoustic Noise
Significant
Minimal
(no fault occurred )
Over-current (oc)
Over-voltage (ov)
Overheat (oH)
Overload (oL)
Overload 1 (oL1)
External Fault (EF)
CPU failure 1 (CF1)
CPU failure 3 (CF3)
Hardware Protection Failure (HPF)
Over-current during acceleration (OCA)
Over-current during deceleration (OCd)
Over-current during steady state operation (OCn)
Electromagnetic Noise,
Leakage Current
Minimal
Significant
Revision May 2008, ME14, SW V3.04
Heat Dissipation
Minimal
Significant
Factory Setting: 00
Factory Setting: 00