Inovance MD280NT2.2GB - Page 146

MD280 User Manual Description of Function Codes
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large, damage to the motor may result because the motor overheats but the AC drive does
not report the alarm.
Figure 6-24 Inverse time-lag curve of the motor overload protection
Time
Motor overload
protection gain
150 %
60
minutes
1 minute
180 % 220% 264 %
11.2
Rated current
Function Code Parameter Name Setting Range Default
FB-02 0RWRURYHUORDGSUHZDUQLQJFRHI¿FLHQW
50%–100%
80%
This function is used to give a warning signal to the control system via a DO before motor
overload protection. This parameter is used to determine the percentage at which pre-
warning is performed before motor overload. The larger the value is, the less advanced the
pre-warning will be.
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Function Code Parameter Name Setting Range Default
FB-03 Overvoltage stall gain QRVWDOORYHUYROWDJH± 0
FB-04
Overvoltage stall protective
threshold
120%–150% 130%
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AC drive. The larger the value is, the greater the overvoltage suppression capacity will be.
In the prerequisite of no overvoltage occurrence, set FB-03 to a small value.
For small-inertia load, the value should be small. Otherwise, the system dynamic response
will be slow. For large-inertia load, the value should be large. Otherwise, the suppression
result will be poor and an overvoltage fault may occur.
Set the value to 10 only in applications with very small inertia.
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protection.
Function Code Parameter Name Setting Range Default
FB-05 Overcurrent stall gain 0–100 20
FB-06 Overcurrent stall protective current 100%–200% 150%
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the AC drive stops acceleration during acceleration, reduces the output frequency at
constant-speed running, or reduces the deceleration frequency during deceleration. After
the output current declines to smaller than the value of FB-06, the AC drive continues to run.
The value of FB-06 is a percentage relative to the rated motor current.
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