Abnormal Speed Detection; Overvoltage Limit Operation; Undervoltage Trip - Toshiba TOSVERT VF-AS1 Instruction Manual

6.33.13 Abnormal speed detection

 : Abnormal speed detection time
 : Overspeed detection frequency upper band
 : Overspeed detection frequency lower band
• Function
These parameters allow you to set the inverter so that, when it is in sensor speed control mode (=,
), it always monitors the rotational speed of the motor, even when the motor is at rest, and if the speed
remains out of the specified limits for the specified length of time, it outputs an error signal.
Title
 Abnormal speed detection time
 Overspeed detection frequency upper band
 Overspeed detection frequency lower band
Output frequency [Hz]
Note 1: This function doesn't operate at the time of a torque control.
Note 2: It is advisable to set the parameter  (Acceleration/deceleration operation after torque limit) to  when
this function is set.

6.33.14 Overvoltage limit operation

 : Overvoltage limit operation level
⇒ For more details, refer to Section 6.14.2.

6.33.15 Undervoltage trip

 : Undervoltage detection level
 : Undervoltage trip selection
 : Undervoltage (trip alarm) detection time
• Function
This parameter is used for selecting the control mode when an undervoltage is detected. (Invalid, while the
inverter stops.) When selecting "tripping enabled," you can also specify the time elapsed before the inverter
trips.
=: (Disabled)
=: (Enabled)
Title
 Undervoltage detection level
 Undervoltage trip selection
 Undervoltage (trip alarm) detection time
Note: For , 100% corresponds to a voltage of 200V (for 200V class) or 400V (for 400V class)
Function
Output frequency
0

Inverter stops,but does not trip. (FL is not active.)
The inverter trips  if an undervoltage passes for the time set with  or
over. (FL is activated.)
Function
F-63
Adjustment range
~ sec.
: Disabled, ~  H z
: Disabled, ~  H z


 trip
Time [s]

Adjustment range
~ %,  %: (auto mode)
: Disabled, : Enabled
~ sec.
E6581445
Default setting



6
Default setting


