Chapter 8 Adjustment
8–25
8-3-6 Improvement of characteristics during acceleration/deceleration
(1) SHG control (option function)
Because SHG control has a smoother response than conventional position controls, the
acceleration/deceleration torque (current FB) has more ideal output characteristics (A constant
torque is output during acceleration/deceleration.) The peak torque is kept low by the same
acceleration/deceleration time constant, enabling the time constant to be shortened.
Refer to item "(3) SHG control" in section "8-2-3 Position loop gain" for details on setting SHG
control.
No.
Abbrev.
Parameter name
Setting
ratio
Setting example
Explanation
Setting range
SV003
(SV049)
PGN1
(PGN1sp)
Position loop gain 1
1
23
26
33
38
47
1 to 200
SV004
(SV050)
PGN2
(PGN2sp)
Position loop gain 2
8/3
62
70
86
102
125
0 to 999
SV057
(SV058)
SHGC
(SHGCsp)
SHG control gain
6
140
160
187
225
281
Always set a
combination of 3
parameters.
0 to 999
SV008
VIA
Speed loop leading
compensation
Set 1900 as a standard value during SHG control.
1 to 9999
SV015
FFC
Acceleration feed
forward gain
Set 100 as a standard value during SHG control.
0 to 999
0
0
3000
200
-200
-3000
0
0
3000
200
-200
-3000
Acceleration/deceleration characteristics during conventional control
Speed command
(r/min.)
Current FB
(stall %)
Time
Time
Acceleration/deceleration characteristics during SHG control
Speed command
(r/min.)
Current FB
(stall %)
Time
Time
