Frequency Pull-in Restart (3052Hex-2AHex = 2)
• A frequency pull-in restart refers to the method of performing acceleration again to restart when the
frequency reference is output to the motor in a free-run state, and the frequency reference is decel-
erated by current limit until there is no longer a current limit. This enables a smooth restart inde-
pendent 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.
• With the RUN command ON, when the free-run state is canceled after the Power Interruption Re-
start W
ait Time (3008Hex-0EHex) has elapsed since the free-run state, the frequency selected by
Starting Frequency Selection at Frequency Pull-in Restart (301FHex-35He) is output and the fre-
quency pull-in restart is performed.
• The examples below assume that the FRS terminal is used.
Example) When Starting Frequency Selection at Frequency Pull-in Restart (301FHex-35Hex) = “0:
Frequency at which the power failure occurred”
FW
FRS terminal
Output frequency
(Motor rotation speed)
Power Interruption
Restart Wait Time
(3008Hex-0EHex)
Free Run Stop Restart Allowable
Time (3052Hex-29Hex)
Example) When Starting Frequency Selection at Frequency Pull-in Restart (301FHex-35Hex) = “3:
Starting frequency”
Power
Interruption
Restart Wait Time
(3008Hex-0EHex)
Free Run Stop Restart
Allowable Time
(3052Hex-29Hex)
FW
FRS terminal
Output frequency
(Motor rotation speed)
Frequency Reference
Starting frequency
8 Other Functions
8-54
M1 Series EtherCAT Type User’s Manual (I670)
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