Rockwell Automation 20B PowerFlex 70, PowerFlex 700 Reference Manual - Manual (Page 151)

Regen Power Limit
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013 151
Regen Power Limit
The [Regen Power Lim] is programmed as a percentage of the
rated power. The mechanical energy that is transformed into electrical power
during a deceleration or overhauling load condition is clamped at this level.
Without the proper limit, a bus overvoltage may occur.
When using the bus regulator [Regen Power Lim] can be left at factory default, –
50%. When using dynamic braking or a regenerative supply, [Regen Power Lim]
can be set to the most negative limit possible (–800%). When the user has
dynamic braking or regenerative supply, but wishes to limit the power to the
dynamic brake or regenerative supply, [Regen Power Lim] can be set to a level
specified by the user.
Reset Meters
The Elapsed kW Hour meter and/or Elapsed Time meter parameters are reset
when parameter 200 is set to a value not equal to zero. After the reset has
occurred, this parameter automatically returns to a value of zero.
0 = Ready
1 = Reset kW Hour Meter
2 = Reset Elapsed Time Meter
Reset Run
Refer to Auto Restart (Reset/Run) on page 38 .
RFI Filter Grounding
Refer to “ Wiring and Grounding Guidelines for PWM AC Drives,” publication
DRIVES-IN001.
S Curve
The S Curve function of the PowerFlex family of drives allows control of the
“jerk” component of acceleration and deceleration through user adjustment of
the S Curve parameter. Jerk is the rate of change of acceleration and controls the
transition from steady state speed to acceleration or deceleration and vice versa.
By adjusting the percentage of S Curve applied to the normal accel/decel ramps,
the ramp takes the shape of an “S”. This allows a smoother transition that
produces less mechanical stress and smoother control for light loads.
Linear Accel & Decel
Acceleration is defined as moving away from zero; deceleration is defined as
moving toward zero. The linear acc / dec ramp is active when the S curve% is set
to zero. The accel time and maximum frequency determine the ramp rate for
speed increases while decel time and maximum frequency determine the ramp
rate for speed decreases. Separate times can be set for accel and decel. In addition,
a second set of accel and decel times is available. In this example Ta = 1.0 sec, Td
= 2.0 sec and Maximum Frequency is set to 60.0 Hz.
Vector FV
200 [Reset Meters]
Resets selected meters to zero.
Default:
Options:
0
0
1
2
“Ready”
“Ready”
“MWh”
“Elapsed Time”