Dynamic control file – Rockwell Automation 20B PowerFlex 700 AC Drives Vector Control (v4.001 and up) User Manual
Page 38
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Rockwell Automation Publication 20B-UM002G-EN-P - July 2014
Chapter 1
Programming and Parameters
Dynamic Control File
Fi
le
Grou
p
No
.
Parameter Name & Description
See
for symbol descriptions
Values
Re
la
te
d
DYN
A
M
IC C
O
NTR
O
L
Ramp Ra
tes
140
141
[Accel Time 1]
[Accel Time 2]
Sets the rate of accel for all speed increases.
Default:
Min/Max:
Units:
10.0 Secs
10.0 Secs
0.0/3600.0 Secs
0.1 Secs
142
143
[Decel Time 1]
[Decel Time 2]
Sets the rate of decel for all speed decreases.
Default:
Min/Max:
Units:
10.0 Secs
10.0 Secs
0.0/3600.0 Secs
0.1 Secs
146 [S Curve %]
Sets the percentage of accel or decel time that is
applied to the ramp as S Curve. Time is added, 1/
2 at the beginning and 1/2 at the end of the
ramp.
Default:
Min/Max:
Units:
0%
0/100%
1%
…
Load Lim
its
147 [Current Lmt Sel]
Selects the source for the adjustment of current
limit (i.e. parameter, analog input, etc.).
Default:
Options:
0
0
1
2
“Cur Lim Val”
“Cur Lim Val”
“Analog In 1”
“Analog In 2”
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] x 1.5
(Equation yields approximate
default value.)
Based on Drive Rating
0.1 Amps
149 [Current Lmt Gain]
Sets the responsiveness of the current limit.
Default:
Min/Max:
Units:
250
0/5000
1
150 [Drive OL Mode]
Selects the drives response to increasing drive
temperature and can 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”
151 [PWM Frequency]
Sets the carrier frequency for the PWM output.
Drive derating can occur at higher carrier
frequencies. For derating information, refer to
the PowerFlex Reference Manual.
Important: Changing the PWM frequency can
affect the motor lead length. Refer to the motor
cable length restriction tables in Wiring and
Grounding Guidelines for Pulse Width Modulated
(PWM) AC Drives, publication
.
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:
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, can produce undesirable results.
Default:
Min/Max:
Units:
0.0 RPM
0.0/200.0 RPM
0.1 RPM
Max Speed
Accel Time
Accel Rate
=
Max Speed
Decel Time
Decel Rate
=