7A.5 Drive Reference Information; 7A.5.1 Drive Faults - O. Thompson Microflite Ultra 2000 Installation & Adjustment Manual

Microflite Ultra 2000 - Magnetek DSD 412 DC Drive
armature voltage is high, reduce parameter 11 until nameplate armature voltage is
obtained while running in the up direction.
4. Remove weights so balanced load is in the car. Access drive parameter 611, "Motor
Armature Current."
Place a car call several floors away so the car will be able to reach base speed. Monitor
5.
the display on the drive during acceleration and deceleration. Record the average value
for accelerating current and decelerating current.
Access the scope screen on the diagnostic monitor. Look at the first 5 seconds of
6.
motion. Ignoring the initial take off and transition from acceleration to top speed,
estimate if the acceleration had occurred at a constant rate, exactly how long, to the
nearest tenth of a second, would it take for the car to go from zero to top speed.
Record this number.
7. Using the following formula, calculate drive parameter 41, "System Inertia."
{(Accel Current - Decel Current) / 2} / (Nameplate Armature Current) X (Accel Time)
Program drive parameter 41 with the calculated value.
8.
Restore drive parameters 11 (Motor RPM), 56 (Field Strength Speed) and 57 (Field
9.
Weaken Speed) to their correct values.
Restore speed parameters "MAX SPEED," ACCEL RATE," and "JERK RATE" to their
10.
correct values.
7a.5 Drive Reference Information
Drive Faults
7a.5.1
Drive faults will be indicated on the display as an "F" followed by a 2 or 3 digit number.
Example: "F 910": This is an indication of a blown fuse.
There are two (2) error logs within the drive.
Parameter #800 contains a list of the last 16 faults that occurred. This list is constantly
updated, with the newest error overwriting the oldest in the list. The list is stored on NVRAM
and is never cleared. Errors on this list could be from the first time the drive was powered up,
it is a continuous list, constantly updated.
Parameter #0 also contains a list of the last 16 faults that occurred. This list is also constantly
updated, with the newest error overwriting the oldest in the list. However, this list can be
cleared.
To view or clear this error list, do the following;
A. Use the arrow keys to scroll to Parameter #0.
B. Press DATA/FCTN key.
C. The first entry is "ALL".
Revision: AA 2.2 Printed 03 - 15 - 03 7a - 6