Reverse Direction Operation - Danfoss VLT MCD 600 Operating Manual

Operating Guide | VLT® Soft Starter MCD 600
Reverse torque/
Forward current (%FLC)
400
6
300
Current
200
100
3
0
Torque
25
1
50
2
1 Parameter 11-1 Reverse Torque
3 Parameter 11-3 Forward Current Limit
5 Parameter 11-6 Pump Stop Time
7 Parameter 11-7 Pump Clean Cycles
Illustration 34: Pump Clean

9.11 Reverse Direction Operation

The soft starter can control a reversing contactor to operate the motor in reverse direction. When reverse operation is selected, the soft
starter performs a soft start using the opposite phase sequence from normal operation.
Reverse operation is controlled by the start/stop input (START, COM+). Set a programmable input to reverse direction (parameter 7-1
Input A Function) and set an output to reversing contactor (parameter 8-1 Relay A Function).
The input must be closed when the start signal is applied. The soft starter keeps the reverse relay in the same state until the end of the
starting/stopping cycle.
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.
66 | Danfoss A/S © 2018.10
7
5
4
Time
8
2 Parameter 11-2 Reverse Time
4 Parameter 11-4 Forward Time
6 Cleaning cycle
8 Programmed soft start
N O T I C E
N O T I C E
Operation
AQ262141844215en-000202 / 175R1174