EACON EC590 Series, User Manual

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EC590 Function parameters description EC590 Function parameters description
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5.5.6 Power Dip Ride-through
The power dip ride-through function ensures the system to run continuously at occurrence of
momentary power loss.
When an instantaneous power loss occurs, the AC drive compensates DC bus voltage reduction
with real-time energy feedback by reducing output frequency, preventing the AC drive from stopp-
ing due to undervoltage.
● F9-59 = 1: It is applicable to large-inertia applications such as fan, water pump and centrifuge
● F9-59 = 2: It is applicable to the textile industry.
Time (t)
Power dip ride-through
F9-60
F9-62
Output
frequency
F9-61
Figure 5-23 Power dip ride-through
Time (t)
Bus
voltage
Function Code
Parameter Name
Default
F9-59
Power dip ride-through function
selection
Setting Range
0
0: Disabled
1: Bus voltage constant control
2: Decelerate to stop
F9-60
Threshold of power dip ride-
through function disabled
85%
85% to 120%
Function Code
Parameter Name
Default
F9-61
Judging time of bus voltage
recovering from power dip
Setting Range
0.5s
0.1s to 10.0s
F9-62
Threshold of power dip ride-
through function enabled
80.0%
60% to 85% (standard bus voltage)
F9-71
Power dip ride-through gain Kp
40
0 to 100
F9-72
Power dip ride-through integral
coefficient
30
0 to 100
F9-73
Deceleration time of power
dip ride-through
20.0s
0.0s to 300.0s
Note
● In bus voltage constant control, when line voltage recovers, the AC drive
accelerates to target frequency.
● In deceleration to stop mode, when line voltage recovers, the AC drive
continues to decelerate to 0 Hz and stops. The AC drive will not be started
until it receives RUN command again.
5.6.7 Load Lost Protection
Function Code
Parameter Name
Default
F9-63 Load lost protection
Setting Range
0
0: Disabled
1: Enabled
F9-64
Load lost detection level
10.0%
0.0% to 100.0% (rated motor current)
F9-65
Load lost detection time
1.0s
0.0s to 60.0s
These function parameters define the load lost protection function.
When output current of the AC drive falls below detection level (F9-64) for longer than time set
in F9-65, the AC drive automatically reduces output frequency to 7% of rated frequency. Once load
recovers during protection, the AC drive accelerates to frequency reference.