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7 Detailed Functions
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
7-4 Detailed Functions (Group b)
7
• The inverter provides the following restart options. Select one that is suited to your application.
[00: 0-Hz restart]
Forces the inverter to restart at 0 Hz. Note that the inverter restarts suddenly while in a free-run state.
Use this setting if the motor stops shortly due to the load.
[01: Frequency matching restart]
Causes the inverter to restart by recognizing the frequency from the voltage between the motor
terminals during free-run stop and adjusting to it. The inverter restarts at 0 Hz if it cannot fully
recognize the voltage between the motor terminals.
Use this setting if the inverter is in a free-run stop for a few seconds.
[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-accelerating
when the Frequency Pull-in Restart Level (b028) is reached.
This enables a smooth restart independent 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.
• For restart operation examples, refer to 5-8-2 Restart after Resetting on page 5-48.
Use this function to cause the inverter to trip when a phase loss is detected in the inverter input power
supply.
*1 The default data was changed from the previous model.
Note The inverter will trip if it is in a phase-loss state for approximately 1 s or more (due to the Input phase loss
protection (E14) error).
A phase loss will cause the following, which may result in an inverter malfunction.
• The ripple current in the main capacitor will increase, which remarkably reduces the life
expectancy of the inverter.
• Under a loaded condition, the inverter’s internal converter may be damaged.
Restart Options
Input Power Supply Phase Loss Protection Selection
Parameter No. Function name Data Default data Unit
b006
Input Phase Loss
Protection Selection
00: Disabled
01: Enabled
01
*1
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