4-14 Manual # 42-02-2223
Final Adjustment
Setting Pattern Parameters
By viewing the commanded pattern and car speed feedback on the iView Virtual Oscilloscope
screen as the car is running, any discontinuity in the idealized speed profile can be observed.
• On the iView Virtual Oscilloscope screen:
• Set Test point 1 =
Pattern (Command)
• Set Test point 2 =
Speed Feedback
Note
Unless otherwise specified, suggested parameter adjustments are assumed to be referring to Standard
Profile parameters.
•
Initial Values for Pattern Parameters
- Pattern shape preset can be used to enter
preset values for the Standard profile parameters based on the high speed (contract speed)
of the elevator and the selected shape type (Slow, Moderate or Fast). This provides an
excellent starting point.
•
Contract Speed Overshoot and Current Limiting
-To prevent contract speed over-
shoot and/or current limiting from the AC Drive, the Acceleration and Low Roll Jerk
parameters can be reduced. The Low Roll Jerk rate has a slightly greater effect on over-
shoot at high speed than does Acceleration. The Acceleration parameter has the most
effect on current limiting. Observe actual car response on iBox
test point STP2 and GND
(with Virtual Oscilloscope Test point 2 set to
Speed Feedback
) to verify that there is no
overshoot.
•
Motor Current Limiting
- If running out of motor current near the end of Acceleration
becomes a problem, as is evidenced by the AC motor current on the Drive keypad during a
full load UP operation:
• TORQMAX F5 drive - set parameter LC30, LC31 (LF.36) Maximum Torque = 300 (3x
LM07 (LF.17)). This will automatically adjust the current limit.
• Magnetek - Increase A1 > Mtr Torque Limit.
• If this does not help, reduce the value of Acceleration. Another possibility is to
decrease the value of Low Roll Jerk so that there is a smooth transition from maximum
acceleration to contract speed.
•
Slope of Acceleration / Deceleration
- Ideally, the slope of acceleration in volts
per second should be equal to or slightly greater than the slope of deceleration as
viewed on an oscilloscope connected to iBox
test point STP1 and COM (with Virtual
Oscilloscope Test point 1 set to
Speed Feedback Filtered
). To get approximately equal
acceleration and deceleration speeds in a system where tracking accuracy is very good,
Acceleration can be equal to Deceleration. If tracking is less accurate, set Acceleration
greater than Deceleration to get the same effective rate of deceleration as acceleration.
Summary of Contents for Nidec iControl
Page 1: ...MOTION CONTROL ENGINEERING User Guide iControl with AC Drive...
Page 15: ......
Page 23: ...1 8 Manual 42 02 2223 iControl Overview...
Page 75: ...2 52 Manual 42 02 2223 Construction Mode...
Page 89: ...3 14 Manual 42 02 2223 Inspection Mode...