User Manual
EM303B General Purpose Inverter
89
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 running 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 in Figure 7-5.
Motor Speed
0
Variable
Output
Frequency
0
Reverse
Motor Speed and
Direction Detection
Negative
Frequency
On
Off
On
Power Supply
Time
Figure7-5 Speed Search Start
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.
Before inverter starts, the motor may run at low speed or in opposite rotation status. If
inverter starts immediately at mean time, overcurrent may occur. In order to avoid such fault,
before inverter starts, please start DC brake to stop motor, and then the inverter runs to setting
frequency as per setting direction. See F3-22
,
F3-23 for the setting method of starting DC
brake.
No.
Function
Range
Unit Default Type
F0-20
Stop Mode Options
0: Ramp to stop
1: Coast to stop
0
〇
Stop Mode Setting:
Ramp to Stop
F0-20=0
Motor is ramp-to-stop in setting deceleration time.
【
Default is F0-10 Deceleration Time 1
】
Coast to Stop
F0-20=1
While the stop command is input, inverter stops output immediately, and the motor
coasts to stop. The stop time is up to load inertia.
If there is a coast-to-stop terminal and when it is on, the inverter enters coast-to-stop status
immediately, and when it is off, the inverter will not restart only if giving the run command
again.
No.
Function
Range
Unit Default Type
F0-21
JOG
+/-
Function Setting
0: Jog running
1: Positive/Negative input switching
2: Disabled
0
〇