
© 1998–2003 Schneider Electric All Rights Reserved
Chapter 2—Menus VVDED397047USR6/03
3—Drive Menu 06/2003
50
Sw Freq -kHz SFr
Selection of switching
frequency. The range depends
on the SFt parameter.
The maximum operational
frequency (tFr) is limited
depending on the switching
frequency:
LF: 0.5-1-2-4
kHz
HF1 or HF2:
4-8-12-16
kHz
[5]
LF: 4 kHz
HF1 or
HF2:
(depend-
ing on
controller
rating)
SFr (kHZ) 0.5 1 2 4 8 12 16
tFr (Hz) 62 125 250 500 500 500 500
Noise Reduct nrd
This function randomly
modulates the switching
frequency in order to reduce
audible motor noise.
No - Yes
Yes if SFt
= LF
No if SFt
= HF1 or
HF2
NOTE: Special
Mot. is not
available in
variable torque
mode except in
the 125–500 hp
drive controllers.
After enabling this
parameter, the IR
compensation
parameter
appears in
Menu 2. For
1/2 –100 hp drive
controllers, setting
SPC to PSM while
in the material
handling macro
and then selecting
the variable torque
macro will leave
the PSM setting
enabled.
Special Mot. SPC
Special motor adaptation
No - Yes -
PSM
No
This parameter should be set to Yes when using special
motors such as synchronous permanent magnet motors,
synchronous wound field motors, or synchronous
reluctance motors. This parameter should also be enabled
if using one
drive controller to control multiple motors in
parallel. Installation of individual motor thermal protection is
required when using the drive controller to control multiple
motors in parallel.
The PSM setting is intended to be used when the motor
connected to the drive controller is less than 25% of the
drive controller’s nominal current rating. It may be
necessary to disable output phase loss protection, OPL.
Installation of motor thermal protection is required in this
type of application.
Also, the PSM setting can be enabled to allow for open
circuit output voltage testing.
Enabling the SPC parameter increases the IR
compensation adjustment range from 0 to 800%.
Table 11: 3—Drive Menu Parameters (continued)
Parameter Code Description
Adjustment
Range
Factory
Setting
[1]
Depending on the position of the 50/60 Hz switch. Ensure that the switch setting
matches the input frequency (see page 14).
[2]
I
n
= drive controller constant torque output current rating shown on the drive controller
nameplate.
[3]
The factory setting depends on the macro-configuration used: No for Material
Handling, Yes for General Use and Variable torque.
[4]
This parameter is not available on 125–500 hp drive controllers.
[5]
Refer to the drive controller instruction bulletin, VVDED397048US, for duty cycle
ratings of the drive controllers.
★ These parameters are available only with the I/O extension card installed.
Menu
3
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