OPERATION
54
EMX4i User Manual 710-14888-00C
Adaptive Control Gain
to initiate the re-learning process. The next start will use
constant current and the next stop will use timed voltage ramp.
Sp
eed
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0
0
4
8
3
5
.C
1
2
3
4
Adaptive Stop Profile
(parameter 2K):
1. Early Deceleration
2. Constant Deceleration
3. Late Deceleration
4.
Stop Time
(parameter 2J)
Time
Adaptive Control is ideal for pumping applications, where it can minimise the
damaging effects of fluid hammer. We recommend testing the three profiles to
identify the best profile for the application.
Adaptive Stop Profile Application
Late Deceleration
High head systems where even a small decrease in
motor/pump speed results in a rapid transition between
forward flow and reverse flow.
Constant Deceleration Low to medium head, high flow applications where the fluid
has high momentum.
Early Deceleration
Open pump systems where fluid must drain back through
the pump without driving the pump in reverse.
DC Brake
Brake reduces the time required to stop the motor.
During braking an increased noise level from the motor may be audible. This is a
normal part of motor braking.
CAUTION
When using DC brake, the mains supply must be connected to the soft
starter (input terminals L1, L2, L3) in positive phase sequence.
CAUTION
If the brake torque is set too high, the motor will stop before the end of the
brake time and the motor will suffer unnecessary heating which could
result in damage. Careful configuration is required to ensure safe operation
of the starter and motor.
A high brake torque setting can result in peak currents up to motor DOL
being drawn while the motor is stopping. Ensure protection fuses installed
in the motor branch circuit are selected appropriately.
