Detailed operation by function groups
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6.5.7.5 Setting the Motor Pre-excite time (FUN_53)
Pre-excitation refers to a process where power is supplied to the coils in the
motor to magnetize them before the motor rotation begins. Because pre-
excitation creates flux in a motor by magnetizing the coils and gets the motor
ready to run, it enhances motor’s acceleration response in a system where a
high starting torque is required.
During pre-excitation, the [FWD] and [REV] indicators flash simultaneously.
•
The pre-excite time set at FUN_53 is used only when FUN_02 (Spd Ref Sel)
is set to “Keypad1”, or “Keypad2”.
Code
Keypad display
Name
Range
Unit
Default setting
FUN_53 PreExct Time
Motor Pre-excite time
0–10000
ms
0
6.5.7.6 Zero-speed time after a stop (FUN_54)
FUN_54 (Hold time) is used to set the time for the motor to stay at the zero-
speed after a deceleration stop. When the motor is running a load with high
inertia, this function can prevent a motor movement by the residual inertia.