Rockwell Automation 21G PowerFlex 750-Series AC Drives Programming Manual User Manual
Page 453
Rockwell Automation Publication 750-PM001J-EN-P - October 2014
453
Application Notes
Appendix B
9.
Set brake slip definition.
Sets the number of encoder counts to define a brake slippage condition.
Counts = Encoder PPR x 4
10.
Set brake float tolerance.
Sets the level at which the float timer starts counting.
11.
Set brake float time.
Sets the time to maintain zero speed with brake open when the run
command has been released.
Setup Complete
The drive is now setup and Torque Prove for the mechanical brake control is
activated. The load can now be applied.
DriveObserver can be used to optimize the speed loop tuning. Use a 30 second
time scaling on the X-axis
12.
Using DriveObserver, set up the following traces.
Run the crane up and down under full load. If necessary, adjust
acceleration and deceleration rates.
Drive Parameter
Setting
P1110 [Brk Slip Count]
250.00 (Default)
Drive Parameter
Setting
P1111 [Float Tolerance]
Use default Hz or RPM.
Drive Parameter
Setting
P1113 [ZeroSpdFloatTime]
5.000 Secs (Default)
Drive Parameter
Setting
P3 [Mtr Vel Fdbk]
Scaled to minimum and maximum speed limits.
P594 [Ramped Spd Ref]
Scaled to minimum and maximum speed limits.
P7 [Output Current]
Scaled to current limit value.
P11 [DC Bus Volts]
Default scaling.
P5 [Torque Cur Fdbk] (Optional)
Default scaling.