User manual

Chapter 5 Description of Parameter Settings

8 - 05 Maximum Allowable Power Loss Time Factory Setting: d 2.0

Settings d 0.3 to d 5.0Sec Unit: 0.1Sec

& During a power loss, if the power loss time is less than the time defined by

this parameter, the AC drive will resume operation. If the Maximum

Allowable Power Loss Time is exceeded, the AC drive output is then turned

off.

8 - 06 Base-Block Time for Speed Search Factory Setting: d 0.5

Settings d 0.3 to d 5.0Sec Unit: 0.1Sec

& When a momentary power loss is detected, the AC drive turns off for a

specified time interval determined by Pr.8-06 before resuming operation. This

time interval is called Base-Block. This parameter should be set to a value

where the residual output voltage is nearly zero, before the drive resumes

operation.

& This parameter also determines the searching time when performing external

Base-Block and Fault Reset (Pr.8-14).

8 - 07 Maximum Speed Search Current Level Factory Setting: d 150

Settings d 30 to d 200 Unit: 1%

& Following a power failure, the AC drive will start its speed search operation,

only if the output current is greater than the value determined by Pr.8-07.

When the output current is less than that of Pr.8-07, the AC drive output

frequency is at a “speed synchronization point”. The drive will start to

accelerate or decelerate back to the operating frequency at which it was

running prior to the power failure.