Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 269)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 269
Motor Control Chapter 4
[Commanded Trq]. This parameter will be entered in units of Hz or RPM,
depending on the value of P300 [Speed Units].
P315 [SLAT Dwell Time] - Speed Limited Adjustable Torque, Dwell Time
Sets the time period that P641 [Speed Error] must exceed the P314 [SLAT Err
Stpt] magnitude in order to return to min/max torque mode.
P675 [Trq Ref A Sel] and P680 [Trq Ref B Sel] - Torque Reference A, B Select
Selects the source for a torque reference, used when the drive is configured to
command torque according to P309…312 [SpdTrqPsn Mode
n]. The values of
the torque reference sources are added together to provide a single torque
reference.
P685 [Selected Trq Ref ] - Selected Torque Reference
Displays the torque value of the selected torque reference (dynamic selection
according to P313 [Actv SpTqPs Mode]). This value will be summed with P686
[Torque Step]. The result is then applied to the input of the notch filter located
in the Vector torque reference section.
P686 [Torque Step] - Torque Step
Defines the amount of torque reference step change to simulate a load
disturbance, used to test the response. This value is added to the main torque
reference P685 [Selected Trq Ref ], and then applied to the input of the notch
filter located in the Vector control torque reference section.
P687 [Notch Fltr Freq] - Notch Filter Frequency
The center frequency for the Notch filter located in the Vector control torque
reference section. To disable, set to zero.
P688 [Notch Fltr Atten] - Notch Filter Attenuation
Sets the attenuation of the notch filter located in the Vector control torque
reference section. Attenuation is the ratio of the notch filter input signal to its
output at the P687 [Notch Fltr Freq]. An attenuation of 30 means that the notch
output is 1/30th of the input at the specified frequency.
P689 [Filtered Trq Ref ] - Filtered Torque Reference
Displays the output of the notch filter defined by P687 and P688. If P704
[InAdp LdObs Mode] indicates that either the Inertia Adaption or Load
Estimate functions are active, then the filtered torque reference will also be
modified by these functions.
Attenuation
Freq (Hz)