Shanghai STEP Electric corporation
For adjustments, first set C02 to about 40 (when C02
＝
0, C01 does not work). When
C01 (P) is very small, the elevator will draw back when running downward without load.
Increase C01 gradually until drawing-back can not be felt when the elevator runs
downward. Too big C01 will cause vertical vibration of the elevator. Therefore, C01 shall
be reduced if the elevator shows significant vertical vibration during starting. C02 is the I
(integral) of the PI adjuster, the higher of which results in a quicker response. It is
generally set between 40 and 60. With C02 too small, C01 will not have enough time to
response; with C02 too high, high-frequency vibration will be likely to occur. C14 is the
effective time of the PI adjuster (i.e., the zero servo time in the figure above). It is generally
set by default (0.8s) and needs no modification.
7.8.1. 2 Adjustment of Sequence
Starting sequence means the order and coordination of closing of the main contactor,
sending of the enabling signals (including upward/downward command), brake opening,
and sending of the given speed signal during starting of the elevator. Generally, when the
elevator starts, the main contactor closes before the Inverter enabling signal is given
followed by the commands to open the brake and the given speed. The order and
coordination of the commands to open the brake and the given speed play a relatively
greater role in the elevator comfort. The ideal situation is that the speed signal be given
after the mechanical action of the brake (completely open). However, due to the brake
contactor delay and the mechanical delay of the brake, it is not easy to provide the
accurate data for the two actions to coordinate in the ideal order. The sequence may be
adjusted according to the following principle: if the elevator draws back obviously when
starting downward without load, the brake opening time may be delayed (or the speed
giving time advanced); if the elevator does not draw back much but dashes significantly
when starting upward, the brake opening time may be advanced (or the speed giving time
delayed).
7.8.1.3 Adjustment through Dwell Speed
In such special situations as the guide shoe is too tight, a little higher dwell speed will help
improve the elevator comfort. The parameters used to adjust dwell speed are listed in the
following table:
7-
24
A
pp
lication of Elevato
r