Drive Startup (Quattro DC Drive)
2-75
2
iControl DC
Drive Response Adjustments (Quattro DC Drive)
Please review the following description of Quattro DC Drive response adjustments:
1. For the initial setup, it is recommended to set Pick delay, Speed pick delay 1, and Speed
pick delay 2 (Configuration > Brake > Timer tab) to a value long enough to allow time
for the drive to respond to a run request.
• If the Pick delay is too short, a DRO fault will occur.
• Once the elevator is moving under control in the appropriate direction and at the com-
manded speed, these delays can be adjusted to a more optimum value.
• Set Pick delay to 1.500 seconds.
• Set Speed pick delay to 1 to 1.600 seconds.
• Set Speed pick delay 2 to 0.750 seconds.
2. The amount of lag between the commanded speed and the drive's response can vary
depending on the tuning of the Quattro drive. As a result, as the drive is adjusted, the
Lag delay parameter (View > Configuration > Pattern > Common > General) will need
to change as well.
• If the lag delay is insufficient, the elevator will plow into a landing. The acceleration
and jerk rate during deceleration to a landing will be greater than profile values indi-
cate.
• If the lag delay is excessive, the elevator will drag into a landing. The acceleration and
jerk rate during deceleration to a landing will be less than profile values indicate. In
addition, a discontinuity in the profile will occur during the transition from accelera-
tion to deceleration when moving between floors where a stabilized speed is not
reached. Under normal operation, this would occur when contract speed is not
reached.
• To adjust the Lag delay, observe “Acceleration (Raw)” on the iView virtual oscilloscope
(View > Diagnostics > Virtual Oscilloscope). Perform one-floor-runs and observe the
transition through zero (peak acceleration transitioning to peak deceleration as the
elevator reaches a peak speed that is less than contract speed). This transition should
have no vertical discontinuity (too much Lag delay) or horizontal discontinuity (too lit-
tle Lag delay). This transition adjustment is only valid when the elevator is unable to
reach the maximum speed for a particular profile (unable to reach contract speed
under normal operation. A physical oscilloscope may be required to see this transition
properly. Adjust the Lag delay until the horizontal discontinuity is eliminated (see
“Velocity and Acceleration Curves” on page 2-76).
• For initial setup, set the Lag delay parameter to 0.3 seconds (View > Configuration >
Pattern > Common > General).
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