5 Start Up
EN 26
YASKAWA Europe
TOEP C710616 92D AC Drive L1000H Quick Start Guide
Leveling Control
In case of wrong setup (e. g. P1 parameter incorrectly entered), the pump might not generate enough flow to move the car
after deceleration from the selected speed to leveling speed.
To allow recovery in such a case, the drive increases the speed automatically in steps up to a maximum value. Refer to
the figure below.
Energy Saving Mode / Overload Operation
Overload operation is active under either of the following conditions:
1. Motor current (U1-03) exceeds level P8-07 for longer than P8-08 and Soft-starter output frequency (U1-16) is higher
than f
MIN OL
. Valid for Nominal and Intermediate speed.
2. Torque has not been captured neither in normal operation nor in condition 1 when speed selector is opened. Valid for
Nominal, Intermediate and Inspection speed.
Acceleration/Deceleration and S curve settings
The acceleration and deceleration ramps are set in C1-
, while the S curves are defined in C2-01 to C2-04. Refer to
the below.
In case that the default ramps do not match, increase or decrease, based on these defaults.
The effective ramp time can be calculated as follows:.
Refer to the figure below. In this example, E1-04 = 60 Hz and C1-01 = 4 s would yield an effective time of 1.3 s.
Nominal / Intermediate /
Inspection Speed
Leveling Recovery Upper
Limit (P7-05)
Upward Run Command
Leveling Recovery Wait Time (P7-01)
P7-04
Leveling Speed
Pump Leakage
Standard procedure
(partially displayed)
Stops with
LETA alarm
Time
P6-02
P6-01
C1-04
S curve
C2-04
C1-02
S curve
C2-03
C1-01
S curve
C2-01
S curve
C2-02
C1-03
Time
Accel/Decel time = C1-0x ×
∆ƒ
E1-04
Maximum Speed
(E1-04)
Example:
∆f = 20 Hz
Speed
C1-01
C1-01 ×
20 Hz
E1-04
Time
