Description of Function Codes
MD380 User Manual
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Figure 6-26 AC drive action diagram upon instantaneous power failure
Bus voltage
Action judging voltage at
instantaneous power failure
F9-62
Voltage rally judging time at
instantaneous power failure
F9-61
Running
frequency
Action pause judging
voltage at instantaneous
power failure F9-60
Action pause judging
voltage at instantaneous
power failure F9-60
Running
frequency
F9-59 = 1: Decelerate
Deceler
-ation
time 3
Deceler
-ation
time 4
Acceler
ation
time
Deceler-
ation time
3
Deceler-
ation time
4
Function Code Parameter Name Setting Range Default
F9-63 Protection upon load becoming 0
0: Disabled
1: Enabled
0
F9-64 Detection level of load becoming 0
0.0%–100.0% (rated
motor current)
10.0%
F9-65 Detection time of load becoming 0 0.0–60.0s 1.0s
If protection upon load becoming 0 is enabled, when the output current of the AC drive
is lower than the detection level (F9-64) and the lasting time exceeds the detection time
(F9-65), the output frequency of the AC drive automatically declines to 7% of the rated
frequency. During the protection, the AC drive automatically accelerates to the set frequency
if the load resumes to normal.
Function Code Parameter Name Setting Range Default
F9-67 Over-speed detection value 0.0%–50.0% (maximum frequency) 20.0%
F9-68 Over-speed detection time 0.0–60.0s 1.0s
This function is valid only when the AC drive runs in the CLVC mode.
If the actual motor rotational speed detected by the AC drive exceeds the maximum
frequency and the excessive value is greater than the value of F9-67 and the lasting time
exceeds the value of F9-68, the AC drive reports Err43 and acts according to the selected
fault protection action.
If the over-speed detection time is 0.0s, the over-speed detection function is disabled.
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