Chapter 12 Description of Parameter SettingsME300
12.1-07-3
2: Frequency tracking starts from the minimum output frequency and accelerates to the master
Frequency command after the drive output frequency and motor rotator speed are synchronous.
Use this setting when there is little inertia and large resistance.
Allowed Power Loss Duration
Default: 2.0
Settings 0.0–20.0 sec.
Determines the maximum time of allowable power loss. If the duration of a power loss exceeds
this parameter setting, the AC motor drive stops output.
Pr.07-06 is valid when the maximum allowable power loss time is ≤ 20 seconds and the AC motor
drive displays “LV”. 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 set in Pr.07-06 does not execute.
Base Block Time
Default: 0.5
Settings 0.1–5.0 sec.
When momentary power loss is detected, the AC motor drive blocks its output and then waits for
a specified period of time (determined by Pr.07-08, called Base Block Time) before resuming
operation. Set this parameter to the time that allows the residual voltage at the output side to
decrease to 0 V before activating the drive 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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