Frequency Jump Function - Hitachi L300P-110L Instruction Manual

Frequency jump function

Frequency jump can be used to avoid resonance points on machinery.
Frequency jump is to jump the frquency command and avoid usual operation
within the limit of the jump frequency.
Output frequency changes continuously according to adjustable time.
It is possible three different points are set for the jump frequency.
Set item
Jump frequency 1/2/3
Jump frequency Width
1/2/3
(Note) The frequency to jump is fj + 2 (Hz).
Output frequency
A067
A065
A063
Acceleration stop function
When the inertial moment of a load is high, this is the function to wait
until the slip of the motor on starting becomes smaller.
Use when the overcurrent trip occurs on starting.
Set item Function code
Acceleration
A069
stop frequency
Acceleration
A070
stop time
Output frequency
A069
Function code Setting limit
A063/A065/A067 0.00-400.0
A064/A066/A068 0.00-10.00
A064
A064
Data
Unit: Hz
0.00-400.0
Set the frequency to be held.
Unit: second
0.0-60.0
Set the time to hold the frequency.
A070
Chapter 4 Explanation of function
Unit: Hz
Set the frequency fj of center to jump.(Note)
Unit:Hz
Set 1/2 value of frequency width to jump (Note)
A068
A068
A066
A066
Frequency command
Contents
Frequency command
4-29
Relation code
A063:Jump frequency1
A064:Jump frequency band1
A065:Jump frequency2
A066:Jump frequency band2
A067:Jump frequency 3
A068:Jump frequency band3
Contents
Relation code
A069:Acceleration stop frequency
A070:Acceleration stop time