6 Programming Features
183
• For a variable speed operation by an analog signal, set the Frequency
Reference Selection (n004) to a value from 2 to 4.
Stall Prevention during Deceleration
If connecting a braking resistor to discharge regenerative energy, be
sure to set the stall prevention during deceleration (n092) to 1.
If the stall prevention during deceleration (n092) is set to the
factory setting 0 (Enabled), the motor may not stop within the
specified decelerating time.
The Stall Prevention during Acceleration (n093) and the Stall
Prevention Level during Running (n094) should be set to
their factory settings to enable these functions.
Settings for V/f Pattern and Motor Constants
To set the control mode and the V/f pattern, refer to the instruction man-
ual. If the Vector control method is used, also set the motor constants.
Momentary Power Loss Restart and Fault Restart
Do not use the momentary power loss restart and fault restart functions
in applications for elevating machines. Make sure that n081=0 and
n082=0. If these functions are used, the motor coasts to a stop with the
brake contact open when a momentary power loss or fault occurs during
operation, possibly resulting in serious accidents.
I/O Open-phase Protection and Overtorque Detection
To prevent the machine from falling when the motor is open-phase or in
a similar situation, enable the I/O open-phase protection (n166 to n169)
and the overtorque detection (n096 to n099). At the factory, these con-
stants are set so that these functions are disabled.
Also, take safety measures such as protection against falls on the
machine.
Carrier Frequency
Set the carrier frequency selection (n080) to 5 kHz or more (n080: 2 to 4
or 12) to secure the motor torque even if an overcurrent occurs (the cur-
rent is limited).
NOTE
