Mitsubishi Electric MELDAS MDS-R-V2-8080 - Improvement of Characteristics During Acceleration;Deceleration

9. Adjustment
9 - 25
9-3-6 Improvement of characteristics during acceleration/deceleration
(1) SHG control (option function)
Because SHG control has a smoother response during acceleration/deceleration 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 "9-2-3 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 1200
SV008 VIA
Speed loop lead
compensation
Set 1900 as a standard value during SHG control. 1 to 9999
SV015 FFC
Acceleration rate
feed forward gain
Set 100 as a standard value during SHG control. 0 to 999
POINT
SHG control is an optional function. If the option setting is not provided with the
NC, alarm 37 (at power ON), warning E4, or error parameter No. 104 (2304 for
M60S/E60 Series NC) will be output.
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 current%)
Time
Time
Acceleration/deceleration characteristics during SHG control
Speed command
(r/min)
Current FB
(stall current %)
Time
Time