iView - Controller View
9-152 Manual # 42-02-7223
Voltage Please refer to “Determine Motor Field Adjustments (System 12 SCR Drive)” on
page 4-8.
• Field forcing voltage: Enter the desired forcing motor field voltage from the job print or
the motor used on this job.
• Field running voltage: Enter the motor field running voltage required to operate at the
rated RPM (approximately 70% of field forcing voltage). This voltage determines the rated
armature voltage at contract speed.
• Field standing voltage: Enter the desired motor field standing voltage (approximately 50%
of field forcing voltage). Lower standing voltage values result in cooler motor field poles.
• Field weakening begin: Determines at what pattern voltage the motor field weakening
begins. Increasing this value delays the weakening of the motor field. Once this threshold
is attained, field forcing voltage is gradually reduced to field running voltage. (Approxi-
mately 50%. May need to lower for highly inductive motor field. May affect tracking on
final approach to landing if set too low.)
• Field weakening end: Determines at what pattern voltage field running voltage is gradu-
ally increased to field forcing voltage when a car is decelerating. (Approximately 90%. May
need to lower for highly inductive motor field.)
PID
• Field proportional: Controls the response of the motor field voltage. Increasing this gain
provides faster response and tighter regulation but high values may cause oscillation and
instability in the motor field. Options - Field Operation must be set to Closed to enable this
control.
• Field integral: Adjust field proportional first. Field integral reduces the accumulated error
between the desired and actual motor field voltage. Higher values may cause oscillation.
Options - Field Operation must be set to Closed to enable this control.
• Field forcing delay: Determines the delay between when the door begins to close and the
start of forcing motor field. This may help reduce heating of the motor field by minimizing
the amount of time the motor field voltage is at field forcing voltage.
Filter
• Field current low pass frequency: This parameter adjusts the amount of filtering (smooth-
ing) that is applied to the analog motor field current feedback. Generally the default value
does not need to be modified. If a change is required, a reduction of the default value will
most likely be needed. Since closed-loop motor field control is based upon the detected
motor field current, proper operation can be affected if insufficient or excessive filtering is
performed.
• Field voltage low pass frequency: This parameter adjusts the amount of filtering (smooth-
ing) that is applied to the analog motor field voltage feedback. Generally the default value
does not need to be modified. If a change is required, a reduction of the default value will
most likely be needed.
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