Hitachi WJ200-001S Instruction Manual page 158

An additional parameter further configures
all instances of a free-run stop. Parameter
, Retry Wait Time Before Motor Restart,
sets the minimum time the inverter will
free-run. For example, if  = 4 seconds
(and =) and the cause of the free-run
stop lasts 10 seconds, the inverter will
free-run (coast) for a total of 14 seconds
before driving the motor again.
The figure at below right describes how
active frequency matching resume operates.
After waiting the time set in , the
inverter tries to catch the speed of the motor
shaft and outputs the speed set in . At
this time, if the motor current rises up to the
value set in , the inverter decreases the
frequency according to the deceleration time
set in , and finally comes to the required
speed. Following are the related parameters
for this control.
Code

Current level of active frequency
matching

Deceleration rate of active frequency
matching

Start freq. of active freq. matching

Restart mode after FRS

Stop mode selection
Func.
Name
Code
Restart mode after FRS

Stop mode selection

Parameter contents
"b" Function
Description
Selects how the inverter resumes
operation when free-run stop (FRS)
is cancelled, three options:
Restart from 0Hz
Restart from frequency detected
from real speed of motor (freq.
matching)
Restart from frequency detected
from real speed of motor (active
freq. matching)
Select how the inverter stops the
motor, two option codes:
DEC (decelerate to stop)
FRS (free-run to stop)
Zero frequency resume
 
= Stop mode = free-run stop
 
Resume from 0Hz
=
[FRS]
0
Zero-frequency start
Motor
speed
0
Active frequency matching resume
 
= Stop mode = free-run stop
 
= Resume from current speed
[FRS]
0
Wait time

Motor
speed
0
Motor
current
RMS
0
Run
Mode
Edit


373
t
t
t


t

t
Defaults
Initial data Units
00 
00 