Toshiba VF-nC1 - Manual (Page 79)

E6581090
F-15
6
6.10.2 Regenerative power ride-through control/slowdown stop control
H : Regenerative power ride-through control
• Function
Regenerative power ride-through control :
Function of letting the motor continue to run using its regenerative energy in the event of
a momentary power failure. (Enabled if H is set to 1 (enabled))
Slowdown stop control:
Function of quickly stopping the motor in case a momentary power failure occurs during
operation. Motor regenerative energy is used to forcibly bring the motor to a stop.
(Enabled if H is set to 2 (slowdown stop))
If the motor is stopped forcibly, it remains at a standstill until the operation command is
cancelled temporarily or the power is turned off.
[Parameter setting]
Title Function Adjustment range Default setting
H
Regenerative power ride-
through control
0: Disabled,
1: Enabled,
2: Slowdown stop
0
Note: Even if this parameter is set to 1 (enabled), the motor may coast to a stop under some load
conditions. In that case, use this function along with the auto-restart function.
[When the power is interrupted]
Approx.
100ms
Motor speed
Input voltage ★ The time for which the operation of the motor is continued depends
on the machine’s inertia or load conditions. Before using this
function, therefore, perform a test to determine the inertial and load
conditions.
★ The use of the retry function along with this function allows the
motor to be restarted automatically without being brought to a stop.
★ Regenerative power ride-through control is performed for about
10ms (if H is set to 1).
[When momentary power failure occurs]
Less than 100 ms
Motor speed
Input voltage
6.10.3 Retry function
H : Retry selection (Selecting the number of times)
Caution
Mandatory
• Stand clear of motors and machines when the retry function is activated.
When the retry function is enabled, the motor and machine in alarm-stop status will restart
suddenly after the specified time, and could cause injury.
• To prevent accidents, attach words of warning saying that the retry function is enabled to the
inverter, motor and machine.
• Function
This parameter resets the inverter automatically when the inverter gives an alarm. During the
retry process, the motor search faction is activated automatically, if necessary for restarting the
motor smoothly.
[Parameter setting]
Title Function Adjustment range Default setting
H
Retry selection (number of
times) 0: Disabled,
1~10: 1~10 times
0