Senlan Hope800 Series Manual page 117

motor decelerates. Afther the current drops the motor reaccelerates to the original operating frequency.
See diagram(b) below.
During deceleration, when Fb-16 is valid and the DC link voltage is greater than Fb-17, the deceleration
stops temporarily. After the DC link voltage drops to the normal level the motor continues to decelerate.
See diagram (c) below.
Output current
Overcurrent stall
point(accel)
Frequency
 If stall holding time exceeds 1min during actual operation, the inverter will show "Er.Abb abnormal
shutdown failure", which can be shielded by selecting "2: valid with unlimited time".
Fb-18 DC link undervoltage action
0: Coast to a stop and report the undervoltage fault(Er.dcL)
1: Coast to a stop, and restart if the voltage resumes within the time set by Fb-20 or report the
undervoltage fault(Er.dcL) if undervoltage time exceeds the time set by Fb-20
Setting
2: Coast to a stop, and restart if CPU is still working and detects that the voltage resumes,
range
without reporting the undervoltage fault
3: Decelerate, and accelerate to the reference frequency if CPU is still working and detects
that the voltage resumes, without reporting the undervoltage fault.
Fb-19
DC link undervoltage point
Setting 370~480V, default 400V
range
Allowable time for momentary power
Fb-20
Setting
0.0~30.0s
range
Fb-21 Momentary power failure decel time
Setting
0.0~200.0s (if Fb-21=0.0, the current decel time is used)
range
The detection of momentary power failure is completed by detecting the DC link voltage. When DC link
voltage is less than Fb-19,
if Fb-18＝0: The motor coasts to a stop, and the fault of DC link undervoltage is reported;
if Fb-18＝1: The motor restarts if the voltage resumes within the time set by Fb-20(refer to Fb-25 for
start mode), or the undervoltage fault is reported if undervoltage time exceeds the time set by Fb-20;
if Fb-18＝2: The motor restarts (refer to Fb-25 for start mode) if CPU is still working and detects that the
voltage resumes;
if Fb-18＝3: The motor first decelerates according to the Fb-21 time or current decel time, then
accelerates to the reference frequency if the voltage resumes.
Overcurrent stall
point(constant
speed)
Time
Frequency
Time
(a)
failure
6 Parameter Description
Output current
Time
Time
(b)
Default 0
400V
Default
Default 0.1s
Default 0.0s
DC bus voltage
Overvoltage
stall point
Frequency
(c)
Change ×
×
Change
×
Change
×
Change
113
Time
Time