User manual

Chapter 5 Description of Parameter Settings
© 1999 DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
37
& 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.
2 - 04 Reverse Operation Inhibit Factory Setting: d 0
Settings d 0 enable REV operation
d 1 disable REV operation
& The parameter determines whether the AC drive can operate in the reverse
direction.
2 - 05 ACI Input Loss Detection Factory Setting: d 0
Settings d 0 Upon the loss of ACI, the drive will default to an
output frequency of 0 Hz.
d 1 Upon the loss of ACI, the drive will stop and display
error message “EF”.
d 2 Upon the loss of ACI, the drive will continue to run at
the last known ACI input.
& This parameter is only effective when the Source of Frequency is commanded
by a 4 to 20 mA signal. The ACI input is considered lost when the ACI signal
falls below 2 mA.