Hitachi SJ Series, User Manual

Page: 208 / 786

12-8-3
Chapter 12 Inverter Function
12.8.2 Switch acceleration time and
deceleration time in two stages
• To change the acceleration or deceleration time by
an external command.
• To slowly accelerate at lower speeds because a
larger torque is needed for starting the movement;
to shorten the acceleration time at higher speeds
than a predetermined value for the purpose of
enhancing the response.
• To revolve forward with faster acceleration or
deceleration; to revolve backward with slower
acceleration or deceleration.
• Setting this function allows you to change the
acceleration or deceleration time while driving in
response to the terminal command, the frequency
command, or the direction command.
• When [AC115] = 00, setting 031 [2CH] in any of the
[CA-01] to [CA-11] and turning OFF/ON the target
Input terminal allows you to switch the acceleration
or deceleration time.
⇒
(Example 1)
• When the input terminal is used for switching,
operation should be performed by assigning 031
[2CH] to any of [CA-01] to [CA-11].
• When [AC115] = 01, the frequency command and
the relationship between the set values [AC116]
and [AC117] can be used to switch the acceleration
or deceleration time.
⇒
(Example 2)
• When [AC115] = 02, the acceleration or
deceleration time can be switched between that for
the forward revolution and that for the backward
revolution.
⇒
(Example 3)
Parameter
Item Parameter Data Description
Maximum
frequency For IM, [Hb105]
For SM (PMM), [Hd105]
10.00~590.00(Hz) Set the maximum value for the frequency.
Acceleration time
1
[AC120] 0.00~3600.00(s)
Set, as the acceleration time, the time that it
takes to rise from 0 Hz to the maximum
frequency.
Deceleration time
1
[AC122] 0.00~3600.00(s)
Set, as the deceleration time, the time that it
takes to fall from the maximum frequency to 0
Hz.
Acceleration time 2 [AC124] 0.00~3600.00(s)
Set, as the acceleration time, the time that it
takes to rise from 0 Hz to the maximum
frequency.
Deceleration time 2 [AC126] 0.00~3600.00(s)
Set, as the deceleration time, the time that it
takes to fall from the maximum frequency to 0
Hz.
2-stage
acceleration or
deceleration
selection
[AC115]
00
Switching by [2CH] terminal (Example 1)
01
Switching by 2-stage acceleration or
deceleration frequency (Example 2)
02
Enabled only when the revolution is switched
between the forward and the backward
directions (Example 3)
2-stage
acceleration
frequency
[AC116] 0.00~590.00(Hz)
Enabled when 2-stage acceleration or
deceleration selection [AC115] is 01.
2-stage
deceleration
frequency
[AC117] 0.00~590.00(Hz)
Enabled when 2-stage acceleration or
deceleration selection [AC115] is 01.
Acceleration or
deceleration input
type
[AC-01] 00
Use the "Setting" of the operator keypad to input
the type.
Input terminal
function selection
[CA-01]~[CA-11] 031
2-stage acceleration or deceleration function
[2CH].
When [AC115] = 00,
OFF: The set acceleration or deceleration
command is enabled.
ON: [AC124]/[AC126] is forcefully enabled.
Q
A
!