Advanced Tuning - Allen-Bradley PowerFlex 70 Reference Manual

Advanced Tuning

Advanced Tuning
12
Advanced Tuning Parameters – PF700 Vector Control Only
ATTENTION: To guard against unstable or unpredictable operation,
!
the following parameters must only be changed by qualified service
personnel.
The following parameters can only be viewed when "2, Unused" is selected in
parameter 196, [Param Access Lvl].
Parameter Name & Description
500 [KI Current Limit]
Current Limit Integral gain. This gain is applied to the
current limit error signal to eliminate steady state current
limit error. A larger value increases overshoot during a
step of motor current/load.
501 [KD Current Limit]
Current Limit Derivative gain. This gain is applied to the
sensed motor current to anticipate a current limit
condition. A larger value reduces overshoot of the current
relative to the current limit value.
502 [Bus Reg ACR Kp]
This proportional gain, in conjunction with P160, adjusts
the output frequency of the drive during a bus limit or
inertia ride through condition. The output frequency is
adjusted in response to an error in the active, or torque
producing, current to maintain the active bus limit, or
inertia ride through bus reference. A larger value of gain
reduces the dynamic error of the active current.
503 [Jerk]
This parameter allows you to adjust the amount of
S-Curve, or "Jerk" applied to the Acc/Dec rate. To enable
the Jerk feature, bit 1 of P56 must be set high.
504 [Kp Ln Ls Bus Reg]
This proportional gain adjusts the active current
command during an inertia-ride through condition, in
response to a bus error. A larger value of gain reduces the
dynamic error of the bus voltage as compared to the bus
voltage reference.
505 [Kd Ln Ls Bus Reg]
Line Loss Bus Reg Kd is a derivative gain, which is applied
to the sensed bus voltage to anticipate dynamic changes
and minimize them. A larger value reduces overshoot of
the bus voltage relative to the inertia-ride through bus
voltage reference.
506 [Angl Stblty Gain]
Angle Stability Gain adjusts the electrical angle to
maintain stable motor operation. An increase in the
value increases the angle adjustment.
507 [Volt Stblty Gain]
Adjusts the output voltage to maintain stable motor
operation. An increase in the value increases the output
voltage adjustment.
508 [Stability Filter]
The Stability Filter coefficient is used to adjust the
bandwidth of a low pass filter. The smaller the value of
this coefficient, the lower the bandwidth of the filter.
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
Values
Default: 1500
Min/Max: 0/10000
Units: 1
Default: 500
Min/Max: 0/10000
Units: 1
Default: 450
Min/Max: 0/10000
Units: 1
Default: 900
Min/Max: 2/30000
Units: 1
Default: 500
Min/Max: 0/10000
Units: 1
Default: 500
Min/Max: 0/10000
Units: 1
Default: 51
Min/Max: 0/32767
Units: 1
Default: 93
Min/Max: 0/32767
Units: 1
Default: 3250
Min/Max: 0/32767
Units: 1