Pattern Scaling - MCi iControl User Manual

Final Adjustment

Pattern Scaling

1. Using Pattern scaling on the
Configuration > Pattern >
Common tab, increase con-
tract speed in 10% increments
until the car is running at
80% of contract speed. Moni-
tor performance on the iView
Virtual Oscilloscope. Set:
• Test point 1 to Pattern Command (8V equals contract speed at 100% scaling)
• Test point 2 to Speed Feedback (8V equals contract speed at 100% scaling)
2. Check for severe overshoot by monitoring Speed/Actual
on the Operational Status tab. Excessive overshoot can
trip the governor. If severe overshoot does not occur, con-
tinue to increase car speed in 10% increments by increas-
ing Pattern scaling incrementally up to a maximum of
100%. Verify that car speed is peaking at no more than 3%
over contract speed (10 fpm @ 350 fpm, 15 fpm @ 500
fpm, etc.).
3. If overshoot occurs, reducing Standard/Low roll jerk (Configuration > Pattern > Modes
tab) may help, however, a Safety A (or B) Contract Overspeed Fault will occur if Stan-
dard/Low roll jerk is reduced too much. Increasing the following TORQMAX drive
parameters will help to reduce overshoot:
• A.LF.31 Kp speed accel: Proportional gain
• d.LF.31 Kp speed decel: Proportional gain
4. Verify car speed by monitoring Speed/Actual on the Operational Status tab, or use a
hand-held tachometer. If car speed is still not correct, verify the following:
• LF.11, LF.20, LF.21, LF.22, LF.23, and LF.42 are set correctly.
• Pattern scaling is 100%.
• If the car is running faster than contract speed parameter LF.20, decrease the value of
high speed parameter LF.42.
• If the car is running slower than contract speed parameter LF.20, provided LF.42 is set
to the same value as LF.20, then verify that Gear Ratio Reduction Parameter LF.22 is
set correctly. If the gear ratio is not correct, it is possible to increase the value of LF.22
in small (0.10) increments to reach contract speed.
Once the car is running at or near contract speed, you must learn the terminal landings in order
to safely run the car to the terminal landings (required before performing drive fine tuning).
(Please refer to "Learning Normal & Emergency Terminal Limit Switches" on page
Caution
Before learning the terminal switches, you can trip on terminal position and/or velocity
faults when the terminal switches (UNT1, DNT1, etc.) are activated. Avoid activating the ter-
minal switches until they have been learned.
4-8 Manual # 42-02-2222
4-9.)