OPERATION
710-14888-00C EMX4i User Manual 57
8.10 Pump Clean
The starter can perform a pump clean function before soft starting the motor. This
can help dislodge debris from the impeller.
Pump clean starts the motor in reverse then forward direction, then stops the
motor. Pump clean can be configured to repeat the process up to 5 times. After the
specified number of cleaning cycles, the starter performs the programmed soft
start.
Pump clean operation is controlled by the start/stop input (11, 12). A programmable
input must be set to pump clean (refer to parameter 7A
Input A Function
for details)
and the input must be closed when the start signal is applied.
Reverse torque/
300%
200%
100%
400%
50%
25%
0%
20124.A
2
4
8
6
1
7
5
3
1:
Reverse Torque
(parameter 11A)
2:
Reverse Time
(parameter 11B)
3:
Forward Current Limit
(parameter 11C)
4:
Forward Time
(parameter 11D)
5:
Pump Stop Time
(parameter 11F)
6: Cleaning cycle
7:
Pump Clean Cycles
(parameter
11G)
8: Programmed soft start
8.11 Reverse Direction Operation
The starter can control a reversing contactor, to operate the motor in reverse
direction. When reverse operation is selected, the starter will perform a soft start
using the opposite phase sequence from normal operation.
Reverse operation is controlled by the start/stop input (11, 12). A programmable
input must be set to reverse direction (parameter 7A
Input A Function
) and an
output must be set to reversing contactor (parameter 8A
Relay A Function
).
The input must be closed when the start signal is applied. The starter will keep the
reverse relay in the same state until the end of the starting/stopping cycle.
This example shows a simple installation, but many different configurations are
possible depending on your application requirements. Contact your local supplier
for an application note showing more installation options.
The first start after the direction is changed will be constant current.
If phase sequence protection is required, install the reversing contactor on
the output (motor) side of the soft starter.
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