Rockwell Automation Allen-Bradley PowerFlex 700 B Series, User Manual

Page: 67 / 228

Programming and Parameters 3-27
D
YNAMIC
CONTR
O
L
Loa
d L
imi
ts
148 [Current Lmt Val]
Defines the current limit value when
[Current Lmt Sel] = “Cur Lim Val.”
When in “Adj Voltage” mode, the output
voltage will not be allowed to exceed this
value.
Default:
Min/Max:
Units:
[Rated Amps]
×
1.5
(Equation yields approxi-
mate default value.)
Based on Drive Rating
0.1 Amps
147
149
149 [Current Lmt Gain]
Sets the responsiveness of the current
limit.
Default:
Min/Max:
Units:
250
0/5000
1
147
148
150 [Drive OL Mode]
Selects the drives response to increasing
drive temperature and may reduce the
current limit value as well as the PWM
frequency. If the drive is being used with
a sine wave filter, the filter is likely tuned
to a specific carrier frequency. To ensure
stable operation it is recommended to set
this parameter to “Reduce CLim”
Default:
Options:
3
0
1
2
3
“Both–PWM 1st”
“Disabled”
“Reduce CLim”
“Reduce PWM”
“Both–PWM 1st”
219
151 [PWM Frequency]
Sets the carrier frequency for the PWM
output. Drive derating may occur at
higher carrier frequencies. For derating
information, refer to the
PowerFlex
Reference Manual .
Important: If parameter 053 [Motor Cntl
Sel] is set to “FVC Vector,” the drive will
run at 2 kHz when operating below 6 Hz.
Default:
Min/Max:
Units:
4 kHz
2 kHz
(Frames 4-6, 600/690VAC)
2/10 kHz
2/4/8/10 kHz
152 [Droop RPM @ FLA]
Selects amount of droop that the speed
reference is reduced when at full load
torque. Zero disables the droop function.
Important: Selecting “Slip Comp” with
parameter 080 in conjunction with
parameter 152, may produce undesirable
results.
Default:
Min/Max:
Units:
0.0 RPM
0.0/200.0 RPM
0.1 RPM
153 [Regen Power Limit]
Sets the maximum power limit allowed to
transfer from the motor to the DC bus.
When using an external dynamic brake,
set this parameter to its maximum value.
Default:
Min/Max:
Units:
–50.0%
–800.0/0.0%
0.1%
053
154 [Current Rate Limit]
Sets the largest allowable rate of change
for the current reference signal. This
number is scaled in percent of maximum
motor current every 250 microseconds.
Default:
Min/Max:
Units:
400.0%
1.0/800.0%
0.1%
053
Fi
le
Gr
ou
p
No.
Parameter Name & Description
See page 3-2 for symbol descriptions
Values
Relate
d
FV
FV