Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 169)

Publication 8720MC-IN002A-EN-P — December 2002
Programming Parameters C-57
Name: Torq_Notch_Freq0 Data Type: Integer R/W
Parameter No.
561
File:
Servo Loop
Group:
Group 0 Description: The 8720MC supports 8 sets of Servo Parameters (0-7). The SERCOS link, the I/O interface or
SCANport can select which set of parameters is to be enabled. Group 0 is the default group. Parameter 561 is
used to provide the drive with the Torque reference notch filter frequency for Servo group 0. This parameter is
used to minimize resonances in the mechanical system. It’s value defines a notch filter frequency at which the
torque command is attenuated. This value should always be set to
≥ 2.5 times the velocity loop bandwidth
(parameter 988). A value of 0.0 disables the filter.
Default:
0 Length
2 bytes Minimum/Maximum
Min.
≥ 0
Max. ≤ 10,000
Scaling Resolution
1 Units
rad/sec
Name: Torq_Lowpas_Frq0 Data Type: Integer R/W
Parameter No.
562
File:
Servo Loop
Group:
Group 0 Description: The 8720MC supports 8 sets of Servo Parameters (0-7). The SERCOS link, the I/O interface or
SCANport can select which set of parameters is to be enabled. Group 0 is the default group. Parameter 562 is
used to provide the drive with the Torque reference low pass filter frequency for Servo group 0. This value should
initially be derived by the drive via auto tuning with the load connected. The parameter establishes the 3db point
of the low pass filter applied to the torque commands. This parameter (if used) should be set higher than the notch
filter frequency.
Default:
2000 Length
2 bytes Minimum/Maximum
Min.
≥ 0
Max.
≤ 10000
Scaling Resolution
1 Units
rad/sec
Name: Regen_Energy_Val Data Type: Decimal R/W
Parameter No.
563
File:
Motor/Drive/
Fdbk
Group:
Drive Data Description: Parameter 563 specifies the amount regenerative energy capacity available to the 8720MC Drive.
This parameter is useful in AC input applications where the supplied regenerative capacity is less than 100% of
the motor current. Parameter 563, Regen_Energy_Val, is used to limit the regeneration current above base
speed. It is expressed as a percentage of continuous current at base speed. Reducing this value will reduce the
deceleration rate and therefore the regenerative current supplied by the motor to the brake chopper module or the
regenerative converter. It can be used to eliminate over voltage trips during rapid motor deceleration.
Default:
1000.0% Length
2 bytes Minimum/Maximum
Min.
≥ 0
Max.
≤ 1000.0
Scaling Resolution
10
-1
Units
%