5-102
5-8 Restart Functions
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-A@@@@)
5
Functions
Example 5) When "01: Frequency matching restart" is selected by Reset Restart Selection
(C103), frequency matching restart can be applied also when the power is
reconnected.
If C103 is set to 00 (0 Hz restart), Restart Standby Time (b003) is ignored.
Note, however, that 0 Hz restart may be applied even when frequency matching
restart is selected, in the following cases:
The output frequency is equal to or lower than 1/2 of the base frequency
The motor induction voltage quickly attenuates
Frequency Matching Lower Limit Frequency Setting (b007) is set and a frequency
below the set frequency is detected.
Reference
The counters used for the Inverter's internal protection will be cleared during reset.
To shut off the Inverter's output via a multi-function input, use the free-run terminal (FRS).
Example 6) Frequency pull-in restart
After an elapse of the time set in Restart Standby Time (b003), output is started from the value
set in Starting Frequency at Frequency Pull-in Restart (b030). Thereafter, The Inverter
decelerates according to Frequency Pull-in Restart Parameter (b029) while keeping the output
current at the value set in Frequency Pull-in Restart Level (b028).
When the frequency matches the voltage, the Inverter accelerates again to reach to the original
frequency level. If an overcurrent trip occurs under this method, reduce the b028 setting.
Reference
If a reset signal is input during the restart wait time, the value of frequency at interruption stored
in the Inverter's internal is cleared, resulting in a 0 Hz restart.
Power supply
FW input
(forward)
Motor rotation speed
Free run
Frequency matching
ON OFF ON
ON
FW input
(forward)
RS input
Output current
Inverter output
frequency
Motor rotation speed
Alarm occurred
Decelerates according to b029.
Frequency selected in b030
b028
b003
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