Setting Pattern Parameters - MCi iControl User Manual

Final Adjustment
• Correction Profile - used when the system is not confident of the car position in the
hoistway. The car proceeds to a known position using the Correction Profile parameters in
order to synchronize its position information.
• Inspection Profile - used when the system is placed on Inspection/Access operation.
The Inspection Profile is also used when the system is learning the building floor heights.
• Alternate 1 - used when the Alternate Speed Profile One input (ASP1) is activated.
• Alternate 2 - used when the Alternate Speed Profile Two input (ASP2) is activated.

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 drive - set parameter LF.36 Maximum Torque = 300 (3x LF.17). This will
automatically adjust the current 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. Also verify that sufficient motor voltage is being devel-
oped at high speed.
4-14 Manual # 42-02-2222
Please refer to "Pattern shape preset" on page 9-132.