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5 Basic Settings
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
5-
7 S
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5-
7-2 F
ree-
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top Selection
(Example 1) 0-Hz restart (b088 = 00)
(Example 2) Frequency matching start (b088 = 01)
• The inverter restarts at 0 Hz independent of the
motor rotation speed. The Restart Standby Time
setting will be ignored during 0-Hz restart.
• If the inverter starts at 0 Hz at a high motor rotation
speed, an overcurrent trip may occur.
• When the restart standby time elapses after the
FRS terminal is turned OFF, the inverter
detects the motor frequency and executes the
frequency matching restart function without
stopping the motor rotation. If an overcurrent
trip occurs during a frequency matching restart,
increase the restart standby time.
• Even when the Free-run Stop Selection is set
to 01 (Frequency matching start), the inverter
may restart at 0 Hz in the following cases.
• The motor rotation speed is equal to or
lower than 1/2 of the base frequency.
• The motor induction voltage decays quickly
and the motor rotation speed cannot be
detected.
• The inverter recognizes that the detected
frequency is equal to or less than the value
set in the Frequency Matching Lower Limit
Frequency (b007).
(Example 3) Frequency pull-in restart (b088 = 02)
• When the set Restart Standby Time (b003) elapses,
the inverter starts output at the frequency set in the
Starting Frequency Selection at Frequency Pull-in
Restart (b030).
Then, the inverter decelerates the motor according
to the Frequency Pull-in Restart Parameter (b029)
setting, while suppressing the output current to the
value set in the Frequency Pull-in Restart Level
(b028).
• When the current decreases to or below the Fre-
quency Pull-in Restart Level (b028), the inverter accel-
erates again to return to the original frequency.
• If an overcurrent trip occurs with this method,
reduce the Frequency Pull-in Restart Level (b028).
0
b003
0
0-Hz start
Free-run
Motor
rotation
speed
Motor
rotation
speed
Free-run
FW
FRS
FW
FRS
Frequency
matching start
b028
b003
Decelerates accord-
ing to b029
Frequency selected
in b030
FW
FRS
Output
current
Inverter
output
frequency
Motor
rotation
speed
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 ...