Hitachi LH1 Series Basic Manual page 52

Chapter 4
[AC-03] to [AC117]
Acceleration/deceleration curve selection
Code/Name
AC-03
Acceleration curve
selection
AC-04
Deceleration curve
selection
AC-05
Acceleration curve
constant setting
AC-06
Deceleration curve
constant setting
AC-08
EL-S-curve ratio @start
of acceleration
AC-09
EL-S-curve ratio @end
of acceleration
AC-10
EL-S-curve ratio @start
of deceleration
AC-11
EL-S-curve ratio @end
of deceleration
*1) The setting range is limited so that AC-08+AC-09≦100.(%)
For example, when AC-09=25%, the setting range of AC-08 is 0 to 75%
AC-10 and AC-11 are the same as above.
・When [AC-03]/[AC-04] = 00 (Linear), the Accel/Decel time
operation becomes linear toward the target value.
・ When [AC-03]/[AC-04] = 01 (S-curve), the start and end of
the Accel/Decel time operation is made loose and
shockless operation is performed.
・When [AC-03]/[AC-04] = 02 (U-curve), at the start of the
Accel/Decel time operation is made loose.
・When [AC-03]/[AC-04]=03(Reverse -U-curve), at the end
of the Accel/Decel time operation is made loose.
・For S-curve, U-curve and Reverse U-curve, the curve
degree of Accel/Decel time operation can be set with
[AC-05]/[AC-06].
・When [AC-03]/C-04] = 04 (EL-S-curve), at the start and
end of the Accel/Decel time operation is made loose.
・For EL-S-curve shockless operation, the curve degree of
Accel/Decel time operation can be adjusted with
[AC-08] to [AC-11].
2-stage Accel/Decel time change
Code/Name
00(Switching by [2CH]
AC115
Accel/Decel
01(Switching by setting)/
change trigger, 1st-motor
02(Switching only when
AC116
Accel1 to Accel2
frequency transition point,
1st-motor
0.00 to 590.00(Hz)
AC117
Decel1 to
Decel2 frequency
transition point, 1st-motor
・Depending on the setting of [AC115], switching to Accel/Decel
time 2 is selected from the following.
"When the input terminal 031 [2CH] is turned ON",
"When the set frequency [AC116]/[AC117] is reached",
"When the operating frequency is switched between forward
and reverse ".
・Set the Accel/Decel time1 with [AC120] and [AC122],
Accel/Decel time2 with [AC124] and [AC126].
Initial
Range (unit)
value
00(Linear)/
00
01(S-curve)/
02(U-curve)/
03(Reverse U-curve)/
00
04(Elevator S-curve)
2
1 to 10
2
25
25
0 to 100(%) *1)
25
25
Initial
Range (unit)
value
terminal)/
00
rotation is reversed)
0.00
0.00
For parameter configuration
Acceleration/deceleration time setting
Code/Name
AC120
Acceleration time
setting 1, 1st-motor
AC122
Deceleration time
setting 1, 1st-motor
AC124
Acceleration time
setting 2, 1st-motor
AC126
Deceleration time
setting 2, 1st-motor
・Assign the Accel/Decel time that takes from 0Hz to reach the
maximum frequency.
・In case that the 2-stage Accel/Decel time function is not meant
to be used, the Acceleration time 1[AC120] and Deceleration
time 1 [AC122] are used.
・The Accel/Decel time setting is from 0 Hz to the maximum
frequency setting ( [Hb105]/[Hd105] ).
Ex ) In the case of maximum frequency = 60Hz, Accel time =
30sec
At this case, if command=30Hz, it reaches 30Hz in 15sec.
(Under conditions when Accel/Decel time does not pause or
etc for other functions.)
Output
frequency
Maximum
frequency
[Hb105]
or
[Hd105]
Actual
acceleration
time
[AC120]
・Example of using the 2-stage Accel/Decel time function is
following.
With [AC115] = 00
FW
2CH
Output
frequency
Accel.
time 1
4-12
[AC120] to [AC126]
Initial
Range (unit)
value
30.00
30.00
0.00 to 3600.00(s)
15.00
15.00
Set output frequency
Time
Actual
deceleration
time
[AC122]
Decel.
Accel.
Decel.
Time 2
time 2
time 1