Hitachi SH1 Series Basic Manual page 55

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 at start
of acceleration
AC-09
EL-S-curve ratio at end
of acceleration
AC-10
EL-S-curve ratio at start
of deceleration
AC-11
EL-S-curve ration at 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 alue.
・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]/[AC-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
AC115
Accel/Decel change trigger,
1st-motor
AC116
Accel1 to Accel2
frequency transition point,
1st-motor
AC117
Decel1 to
Decel2 frequency
transition point, 1st-motor
・
Depending on the setting of [AC115], the trigger for switching
to Accel/Decel time 2 is selected from the following.
"When the input terminal 031 [2CH] is turned ON",
"When the operating frequency reaches the set frequency
[AC116]/[AC117]", "When the operating frequency
switches from forward to reverse".
・Set the Accel/Decel time1 with [AC120] and [AC122], and the
Accel/Decel time2 with [AC124] and [AC126].
Initial
Range (unit)
value
00(Linear)/
01(S-curve)/
02(U-curve)/
03(Reverse U-curve)/
04(Elevator S-curve)
1 to 10
0 to 100(%) *1)
Initial
Range (unit)
value
00(Switching by [2CH]
terminal)/
01(Switching by setting)/
02(Switching only when
rotation is reversed)
0.00
0.00 to 590.00(Hz)
0.00
For parameter configuration
Acceleration/deceleration time setting
Code/Name
AC120
Acceleration time
00
setting 1, 1st-motor
AC122
Deceleration time
00
setting 1, 1st-motor
AC124
Acceleration time
2
setting 2, 1st-motor
AC126
Deceleration time
2
setting 2, 1st-motor
・The Accel/Decel time setting is the time when operating from
0 Hz to the maximum frequency as shown below figure.
25
・In case that the 2-stage Accel/Decel time function is not used,
the Accel/Decel time 1 [AC120]/[AC122] are used.
25
Ex ) The Accel/Decel time setting is from 0 Hz to the maximum
25
frequency setting ( [Hb105]/[Hd105] ).
In the case of maximum frequency = 60Hz,
Accel time = 30sec, frequency reference=30Hz,
25
The time to reach 30Hz is 15 seconds.
( Under conditions when Accel/Decel time does not
pause or etc for other functions.)
Output
frequency
Maximum
frequency
[Hb105]
or
[Hd105]
Actual
acceleration
time
・Example of using the 2-stage Accel/Decel time function
is following.
With [AC115] = 00 (Switching by [2CH] terminal)
00
2CH
Output
frequency
4-12
[AC120] to [AC126]
Range (unit)
0.00 to 3600.00(s)
Set output frequency
Actual
deceleration
time
[AC120] [AC122]
Decel.
Acc. Acc.
Time 2
time 2
time 1
Unit
value
30.00
30.00
15.00
15.00
Time
Decel.
time 1