Chapter 5 Parameter Introductions
153
Action
Detect time
Detect time
Detect threshold
Output current
Enabled
Time
Time
Fig. 5-13-2 Overload pre-alarm function
Tips:
1. Pre-overload detection threshold should be lower than the overload protection
threshold.
2. During the overload detection time, if the current of inverter is less than Pd.02, the
inverter will clear the record of pre-overload detection time.
Pd.04 Current amplitude limit
Range: 0~3【3】
Pd.05 Current amplitude limiting level
Range:
Type G: 20~180%【150%】
Type P: 20~140%【120%】
0: Invalid
1: Valid during Acceleration and deceleration, invalid in constant speed Operation
2: Valid
3: Over-current during acceleration or constant speed, reduce frequency
Note:
When the inverter is running at Acc/Dec or constant speed, there may be a sharp
increase in the current, because of the unmatched acc time and motor inertia, or the
mutation of load torque. In order to control the output current, when Pd.04 is set to
1 or 2 or 3, the inverter’s output frequency may be adjusted automatically.
In Acc or Dec process, if the output current reaches “Current amplitude limiting
level” (Pd.05), the inverter’s output frequency will stop changing until the current
returned to normal, and then continue accelerating/decelerating. Finally, the current
will be controlled not more than Pd.05.
In constant speed operating process, if Pd.04 is set to 2 or 3, when the output
current reaches “Current amplitude limiting level” (Pd.05), the inverter will reduce
output frequency. When the current lower, the inverter will return to the original
work state. If Pd.04 is set to 1, the output frequency will not be changed.
When the inverter is in the status of current amplitude limit, the time last more than
1 minute or press “STOP/RESET” key directly and hold over 2s, the inverter will
coast to stop.
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