Hitachi SJ Series, User Manual

Page: 216 / 786

12-8-11
Chapter 12 Inverter Function
12.8.6 Make the frequency follow
the command instantaneously
• To output the frequency in such a manner as the
analog command requires it.
• To make the motor follow the command as fast as
possible.
• If the acceleration or deceleration cancel [LAC]
function is selected as the input terminal function
selection and the signal is turned ON, the
acceleration or deceleration time becomes ignored
and the output frequency is made instantaneously
to follow the set frequency.
• As the use of the acceleration or deceleration
cancellation function makes the output follow the
command, a large amount of increase/decrease in
the frequency demanded by the command may
cause a trip.
• [LAC] function is valid for any frequency command
such as one from parameter set-up, one from the
communication, and so on.
Item Parameter Data Description
Input terminal
function selection
[CA-01]~[CA-11] 071
Acceleration or deceleration cancellation
function [LAC] is selected.
Canceling the acceleration or deceleration
and making the output follow the command.
Q
A
!
[LAC]
Output frequency
Time
Analog frequency command
ON ON
Following
the
command
Follow the acceleration or
deceleration time