Motor Controllers AC Variable Frequency Drives
RVBS
Specifications are subjected to change without notice.10/08/2021
26
P07
0x0207
Motor (Slip compensation gain for
driving)
1000
0
2000
0.1%
R/W
P08
0x0208
Motor (Slip compensation response
time)
100
1
1000
0.01Sec.
R/W
P09
0x0209
Motor (Slip compensation gain for
braking)
1000
0
2000
0.1%
R/W
P10
0x020A
Motor (Rated slip frequency)
240/233
0
1500
0.01Hz
R/W
4.2.9
Commands
4.2.9.1
Restart mode
F12 specifies the action to be taken by the inverter such as trip and restart in the event of a momentary
power failure.
-
Restart mode after momentary power failure (Mode selection) (F12)
Data for F12
Mode
Description
0
Disable restart
(Trip immediately)
As soon as the DC link bus voltage drops below the under-voltage detection
level due to a momentary power failure, the inverter issues under voltage
alarm LU and shuts down its output so that the motor enters a coast-to-stop
state.
1
Disable restart
(Trip after
recovery from
power failure)
As soon as the DC link bus voltage drops below the under-voltage detection
level due to a momentary power failure, the inverter shuts down its output so
that the motor enters a coast-to-stop state, but it does not enter the under-
voltage state or issue under voltage alarm LU.
The moment the power is restored, an under-voltage alarm LU is issued,
while the motor remains in a coast-to-stop state.
2
Trip after
decelerate-to-stop
As soon as the DC link bus voltage drops below the continuous running level
due to a momentary power failure, decelerate-to-shop control is invoked.
Decelerate-to-stop control regenerates kinetic energy from the load's moment
of inertia, slowing down the motor and continuing the deceleration operation.
After decelerate-to-stop operation, an under-voltage alarm LU is issued.
(Available in the ROM version 0500 or later.)
4
Enable restart
(Restart at the
frequency at which
the power failure
occurred, for
general loads)
As soon as the DC link bus voltage drops below the under-voltage detection
level due to a momentary power failure, the inverter saves the output
frequency being applied at that time and shuts down the output so that the
motor enters a coast-to-stop state.
If a run command has been input, restoring power restarts the inverter at the
output frequency saved during the last power failure processing.
This setting is ideal for applications with a moment of inertia large enough not
to slow down the motor quickly, such as fans, even after the motor enters a
coast-to-stop state upon occurrence of a momentary power failure.
5
Enable restart
(Restart at the
starting frequency,
for
low-inertia load)
After a momentary power failure, restoring power and then entering a run
command restarts the inverter at the starting frequency specified by function
code F18.
This setting is ideal for heavy load applications such as pumps, having a
small moment of inertia, in which the motor speed quickly goes down to zero
as soon as it enters a coast-to-stop state upon occurrence of a momentary
power failure.
