Shanghai STEP Electric corporation
Suppose the rated speed of the elevator is 2m/s, the parameters may be set as follows:
Parameter Speed
Step
Value
D11 reference speed 0
Zero
0
D12 reference speed 1
Half checking speed
0.120 m/s
D13 reference speed 2
Re-leveling speed
0.030 m/s
D14 reference speed 3
Leveling (creeping) speed
0.050 m/s
D15 reference speed 4
Checking speed
0.250 m/s
D16 reference speed 5
High speed 1 (single-floor speed)
1.000 m/s
D17 reference speed 6
High speed 2 (double-floor speed)
1.600 m/s
D18 reference speed 7
High speed 3 (multi-floor speed)
2.000 m/s
If there is any difference of the definition of the speed codes from the above in practice,
the user may take proper measures on the basis of the example above.
2. Adjustments of acceleration (deceleration) and the parameters of S curve corners: D01
and D02 are used for the adjustments of acceleration and deceleration, and D03 to D07
for the adjustments of the four S curve corners. The definitions and the adjusting methods
of these parameters are similar with those of the analog control modes. The difference is
that these parameters shall be modified on the Inverter in multi-step control mode while
they shall be modified on the elevator controller in analog control modes. Moreover, D03 -
D07 represent the acceleration (or deceleration) jerk of the four S curve corners
respectively. A higher value of the parameters means a shorter acceleration (or
deceleration) time, and higher elevator efficiency, but lower comfort. On the other hand, a
lower value means longer time, higher efficiency, and better comfort.
Figure 7.7 provides the positions of D01, D02 and D04 - D07 on the speed curve for
reference during commissioning.
Figure 7.7 Position of the parameters on the speed curve
7-
22
A
pp
lication of Elevato
r
Speed V
Time t
7.8 Adjustment of Comfort
Elevator comfort is one of the important indexes of elevator performance. There are many
factors that play a role in the comfort of elevators, for example, mechanically, installation
and adjustment of the guide rail and guide shoe, performance of the traction machine, and
so on; electrically, the speed curve, electromagnetic interference to the analog signals (in
analog control mode), quality of encoder feedback signals, and drive performance of
Inverter. As the user manual, the following discussion is based on the fact that all other
factors concerning elevator comfort are already adjusted. This section will describe how to
improve Inverter drive performance through adjustments of related parameters in order to
obtain excellent comfort.