Teco Electro Drives TSTA Series, Installation And Operation Manual

Page: 157 / 218

6-14
Parameter
Name & Function Default Unit
Setting
Range
Control
Mode
Chapter
S curve speed command acceleration and
deceleration time setting.
Sn208
Set Sn205 = 3 to enable this function.
In the period of Acc/Dec , drastic speed changing
might cause vibration of machine. S curve speed
command acc/dec time setting has the effect to
smooth acc/dec curve.
Speed Command (rpm)
Time
ts ts
ta
ts ts
td
ts=Sn208
ta=Sn209
td=Sn210
Rule for the setting
：
s
a t
t
>
2
，
s
d t
t
>
2
1 msec
1
│
1000
S 5-3-6
S curve speed command acceleration time setting.
Sn209
Refer Sn208
200 msec
0
│
5000
S 5-3-6
S curve speed command deceleration time setting.
Sn210
Refer Sn208
200 msec
0
│
5000
S 5-3-6
Speed loop Gain 1
Sn211
Speed loop gain has a direct effect on the frequency
response bandwidth of the Speed-control loop.
Without causing vibration or noise Speed-loop-gain
can be increased to obtain a faster speed response.
If
Cn025 (load Inertia ratio) is set correctly, the
speed-loop-bandwidth will equal to speed-loop-gain.
40 Hz
10
│
450
Pi
Pe
S
5-3-8
5-5
Speed-loop Integral time 1
Sn212
Speed loop integral element can eliminate the steady
speed error
and react to even slight speed variations.
Decreasing Integral time can improve system rigidity.
The formula below shows the relationship between
Integral time and Speed loop Gain.
a SpeedLoopG
t TimeCons ntegration SpeedLoopI
×
× ≥
π
2
1
5 tan
100
x0.2
ms
1
│
500
Pi
Pe
S
5-3-8
5-5