Wx9 Asd Characteristics; Over-Current Protection; Wx9 Asd Capacity; Using Vector Control - Toshiba WX9 ASD Installation & Operation Manual

WX9 ASD Characteristics

Over-Current Protection

Each WX9 ASD model was designed for a specified operating power range. The WX9 ASD will incur
a trip if the design specifications are exceeded.
However, the WX9 ASD may be operated at 120% of the specified output-current range for a limited
amount of time as indicated in the section titled
Stall Prevention Level
When using the WX9 ASD for an application that controls a motor which is rated significantly less than
the maximum current rating of the WX9 ASD, the over-current limit setting will have to be changed to
match the application. See
motor configuration.

WX9 ASD Capacity

The WX9 ASD must not be used with a motor that has a significantly larger capacity, even if the motor
is operated under a small load. A WX9 ASD being used in this way will be susceptible to a high-output
peak current which may result in nuisance tripping.
DO NOT apply a level of input voltage to a WX9 ASD that is beyond that which the WX9 ASD is
rated. The input voltage may be stepped down when required with the use of a step-down transformer or
some other type of voltage reduction system.

Using Vector Control

Using Vector Control enables the system to produce very high torque over the entire operating range
even at extremely low speeds. Vector Control may be used with or without feedback. However, using
feedback increases the speed accuracy for applications requiring precise speed control. Enabling the
Automatic Energy Savings further increases the efficiency of the WX9 ASD while maintaining its
robust performance.
Vector Control is not capable of operating multiple motors connected in parallel.
See F402 on pg. 138

Hand/Auto Operation

While running in the Hand mode at a non-zero speed, if the RJ45 connector is removed from the EOI,
the WX9 ASD remains in the Hand mode running at the last commanded speed even though the Hand/
Auto LED is off. The WX9 ASD output remains at the frequency of the
the time of the disconnect for the duration of the disconnect.
Once reinserted, the reference frequency goes to 0 Hz.
To prevent this condition, before disconnecting the RJ45 connector, ensure that the WX9 ASD is off.
WX9 ASD Installation and Operation Manual
(F601) may be adjusted to help with nuisance over-current trips.
Motor Overload Protection Level 1
for additional information on using Vector Control.
CAUTION
Voltage/Current Specifications on pg.
for additional information on this ASD/
Frequency Command
202. Also, the
field at
13