5 Basic Settings
5 - 40
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
02: Frequency pull-in restart
Causes the inverter to restart by outputting the starting frequency set in the Starting Frequency
Selection at Frequency Pull-in Restart (b030) to the motor in a free-run stop state and re-acceler-
ating when the Frequency Pull-in Restart Level (b028) is reached.
This enables a smooth restart independently of the voltage between motor terminals.
Use this setting when the Inverter is in free-run state for a long time due to a large load inertia.
• When the Frequency Matching Lower Limit Frequency (b007) is set, executing the frequency pull-in
restart function causes the inverter to restart at 0 Hz if the set frequency or less is detected.
• Immediately after a free-run stop, a large residual voltage remains between motor terminals.
If the inverter restarts the output, an overcurrent may occur. In this case, set the Restart Standby
Time (b003) to a long time.
• While in a free-run stop state, the motor is not subject to external influence because the inverter out-
put is shut off.
Even if the motor is stopped by external brake or the effect of other equipment, the inverter can still
be used without detecting any overcurrent.
However, if the motor in a free-run state is rotated externally, the regenerated energy may be fed
back to the inverter and an overvoltage may be detected. In this case, use the regenerative braking
function.
• The details of the Starting Frequency Selection at Frequency Pull-in Restart (b030) are shown below.
• The examples below assume that the FRS terminal is used.
When the motor is stopped in a free-run state by the STOP command, restarting of the inverter
occurs in the same timing as when the FRS terminal turns OFF.
Parameter
No.
Function name
Data
Default
data
Unit
b088
Free-run Stop Selection
00: 0-Hz restart (Example 1)
00
−
01:
Frequency matching restart (Example 2)
02:
Frequency pull-in restart (Example 3)
b003
Restart Standby Time
0.3 to 100.0
1.0
s
b007
Frequency Matching
Lower Limit Frequency
0.00 to 99.99
100.0 to 400.0
0.00
Hz
b028
Frequency Pull-in Restart
Level
Heavy
load
(CT)
0.20
×
Rated current to 2.00
×
Rated
current
Rated
current
value
A
Light
load
(VT)
0.20
×
Rated current to 1.50
×
Rated
current
b029
Frequency Pull-in Restart
Parameter
0.1 to 999.9
1000. to 3000.
Set the deceleration rate for the output frequency
during frequency pull-in restart.
Set the deceleration time from the maximum fre-
quency to 0 Hz.
0.5
s
b030
Starting Frequency Selec-
tion at Frequency Pull-in
Restart
00:
Frequency at interruption
00
−
01:
Maximum Frequency
02:
Set frequency (Frequency reference)
C001 to
C007
Multi-function Input S1 to
S7 Selection
11:
FRS (Free-run stop)
−
−
Set value
Content
Description
00
Frequency at interruption
Executes pull-in restart from frequency at which inverter output is shut
off.
01
Maximum Frequency
Executes pull-in restart from maximum frequency.
02
Set frequency
Executes pull-in restart from set frequency reference.
Summary of Contents for SYSDRIVE MX2 SERIES
Page 1: ...Multi function Compact Inverter MX2 Series Type V1 User s Manual I585 E1 01 3G3MX2 A V1 ...
Page 32: ...CONTENTS 29 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 108: ...2 Design 2 48 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 176: ...4 Parameter List 4 42 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 538: ...10 Troubleshooting 10 22 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 598: ...12 Options 12 50 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 614: ...Appendices A 16 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 615: ...I 1 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 I Index ...