Group 50 — AC Drive Control
MVX9000 User Manual
5-39
Descriptions of
Parameter Settings
50.26
Maximum Speed
Search Current Level
Range: 30 to 200%
Default: 150%
Unit: 1%
Following a momentary power failure, the AC drive will start its
speed search operation, only if the output current is greater than
the value determined by 50.26. When the output current is less
than that of 50.26, the AC drive output frequency is at a “speed
synchronization point”. The drive will begin to accelerate or
decelerate the motor back to the operating frequency at which it
was running prior to the power failure.
Figure 5-40: Power Loss Parameters
50.27
Upper Limit of Output
Frequency
Range: 0.1 Hz to 400.0 Hz
Default: 400.0 Hz
Unit: 0.1 Hz
This parameter must be equal to or greater than the Lower
Limit of Output Frequency 50.28.
50.28
Lower Limit of Output
Frequency
Range: 0.0 Hz to 400.0 Hz
Default: 0.0 Hz
Unit: 0.1 Hz
The Upper and Lower Limit parameters are to prevent
operation at frequencies where machine damage may occur.
If the Upper Limit of Output Frequency is set at 50 Hz and the
Maximum Output Frequency is set at 60 Hz, the actual
Maximum Output Frequency will be limited to 50 Hz.
If the Lower limit of Output Frequency is set at 10 Hz, and the
Minimum Output Frequency is set at 1.0 Hz, then any
Command Frequency between 1 – 10 Hz will generate a 10 Hz
output from the drive.
This parameter must be equal to or less than the Upper Limit
of Output Frequency 50.27.
Speed Search
Speed
Synchronization
Detection
50.23 = 01
Speed Search
Starts with the
Master Frequency
50.24
Base-Block
Time
Output
Voltage
Output
Power
Input
Power
Max. Allowable
Power Loss Time
50.24
50.23 = 02
Speed Search
Starts with Minimum
Output Frequency
50.25
Base-Block
Time
Max. Allowable
Power Loss Time
50.24
Содержание MVX9000 Series
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