Chapter 12 Description of Parameter SettingsMS300 (High Speed Model)
12-07-3
Setting 2: Frequency tracking starts from the minimum output frequency, accelerating to master
frequency command after the drive output frequency and motor rotator speed is synchronous.
This setting is recommended if the characteristics of motor load are small inertia and large
resistance.
Allowed Power Loss Duration
Factory Setting: 2.0
Settings 0.0~20.0 sec.
This parameter determines the maximum time of allowable power loss. If the duration of a power
loss exceeds this parameter setting, the AC motor drive will stop outputting.
Pr. 07-06 is valid when the maximum allowable power loss time is 20 seconds and the AC
motor drive displays “LU”. But if the AC motor drive is powered off due to overload, even if the
maximum allowable power loss time is 20 seconds, the operation mode as set in Pr. 07-06 is
not executed. In that case it
Base Block Time
Factory Setting: 0.5
Settings 0.1~5.0 sec.
When momentary power loss is detected, the AC motor drive will block its output and then wait
for a specified period of time (determined by Pr. 07-08, called Base-Block Time) before resuming
operation. This parameter should be set at the time which allows the residual voltage at output
side to decrease to 0V before the drive is activated again.
Time
B.B. Speed tracking: from last output frequency
B.B.
A
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time Pr. 07-08
Speed tracking
Synchronous speed detection
Frequency command before B.B.
Output frequency (H)
Output voltage (V)
Output current
Pr. 07-09
Current level of
speed tracking
FWD Run
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