User Manual
EM303A General Purpose Inverter
85
No.
Function
Range
Unit
Default
Type
F0-16
Maximum Frequency
Fmax: 20.00
～
600.00/20.0
～
6000.0 Hz 50.00
〇
F0-17
Upper Limit Frequency
Fup: Fdown
～
Fmax Hz
50.00
〇
F0-18
Lower Limit Frequency
Fdown:0.00
～
Fmax/0.0
～
Fmax
Hz
0.00
〇
F0-16
Fmax indicates the maximum setting frequency permitted by inverter. Range of
Fmax: 20.00
～
600.00/20.0
～
6000.0Hz.
F0-17
Fup indicates the maximum permitted running frequency after inverter start-up.
Range of Fup: Fdown~Fmax.
F0-18
Fdown indicates the minimum permitted running frequency after inverter
start-up. Range of Fdown: 0.00Hz~Fup/0.0Hz~Fup.
1. Upper limit frequency and lower limit frequency should be prudently set as
per the actual parameters listed on controlled motor nameplate and operational
status. Do not make the motor run for a long time in the lower frequency status.
Otherwise, the service lifespan of motor will be reduced due to overheating.
2. Correlation of maximum frequency, upper limit frequency, and lower limit frequency:
0.00Hz
≤
Fdown
≤
Fup
≤
Fmax
≤
600.00Hz
No.
Function
Range
Unit
Default
Type
F0-19
Start Mode Options
0: Normal start
1: Speed search start
0
〇
F0-19=0
Start as per setting mode:
Zero speed start, or DC brake first,
and then zero speed start.
F0-19=1
Speed search start: Before
inverter starts, the motor may be
rotating. Detecting motor speed and
direction when inverter starts
running, the speed and direction of
motor can be directly searched base
on the detection result. Smooth start
can be applied to the motor which is
rotating. The process of speed
search is as shown on Figure 7-5.
1. Load inertia shall be taken into consideration when increasing the setting
value of acceleration/deceleration time in speed search start mode.
2. Speed search start mode is applicable to the occasion when one inverter
drives one motor, especially practical for industrial dryer. Due to the grid power outage
or accidental fault of inverter, the industrial dryer will rotate freely for a long time. Speed
search start can ensure that the industrial dryer returns normal work as short as possible.
Figure7-5 Speed Search Start
