HX7+ ASD Installation and Operation Manual 125
PWM Carrier Frequency
Program Special Control
This parameter sets the frequency of the pulse width modulation signal applied
to the motor.
Note: The carrier frequency must be 2.2 kHz or above except while
operating in the Constant Torque, Variable Torque, or the 5-
Point Setting modes.
Note: The maximum Carrier Frequency setting allowed is 5.0 kHz for
the following ASDs:
460-volt
150 HP – 350 HP.
The maximum Carrier Frequency setting allowed for all other
ASDs is 15 kHz.
Setting the Carrier Frequency above the Derate Threshold frequency for a given
ASD will reduce the capability of the ASD.
Contact
Direct Access Number — F300
Parameter Type — Numerical
Factory Default — 2.200
Changeable During Run — No
Minimum — 0.500
Maximum — (ASD dependent)
Units — kHz
Example
Break/Make ST
Program Protection Retry/Restart
This parameter Enables/Disables the ability of the drive to start into a spinning
motor when the ST – CC connection opens momentarily and is then closed
(Break/Make ST) or after a power interruption (momentary power failure). This
parameter also Enables/Disables
F312 and F313.
Settings:
0 — Enabled (box checked)
1 — Disabled
Direct Access Number — F301
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — Ye s
Ridethrough Mode
Program Protection Undervoltage/Ridethrough
This parameter determines the motor-control response of the drive in the event
of a momentary power outage.
Settings:
0 — Off
1 — Ridethrough
2 — Stop
Direct Access Number — F302
Parameter Type — Selection List
Factory Default — Off
Changeable During Run — Ye s
F300 F302
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