Pub 49440
Effective 01/02
5
Figure 12.
Adjust Time and Torque
How to Adjust Time and Torque, Figure 12
Control of the motor torque is achieved by acting on the motor
voltage.The motor speed depends on the torque produced by
the motor and the load on the motor shaft. A motor with little or
no load will reach full speed before the voltage has reached its
maximum value.
NOTE:
The soft start controller will read time and torque set-
tings in the OFF state. Repeated starts may trip the
motor protection relay. DO NOT set the rotary
switches in between positions. This corrupts the time
and torque adjustment. Use screwdriver 2 mm x
0.5 mm.
Rating Index
Table 8.
Rating Index
Ramp-Up Time and Initial Torque
Table 9.
Ramp-Up Time and Initial Torque
(Standard Load)
Kick Start/Break Loose
If it is not possible to reach a time sufficient for the application,
it may be necessary to kick start the load.
Table 10.
Kick Start/Break Loose (High Inertia Loads)
Ramp-Down Time
Follow
Table 9
to set
Ramp-Up
and
Initial Torque
.
Table 11.
Ramp-Down Time, e.g. Pump Loads
200ms kick start with
Adj. Torque, 0 - 85%
0
100%
Motor Voltage
Time
Ramp-Up, 0.5 - 10 Sec.
Ramp-Down, 0.5 - 10 Sec.
Torque Adjustment, 0 - 85%
8,2
5,6
3,9
0,8
1,2
1,8
0
2,7
8,2
5,6
3,9
0,8
1,2
1,8
0
2,7
J
t
Ramp up
U
t
Ramp down
U
t
Initial torque
U
t
Kick start
0
4
6
6
4
2
0
2
6
4
2 0
2
6
0
4
A1
A2
2 /T1
4/T2
6/T3
11
12
1/L1
3 /L2
5/L3
S701E25N3S
92EQ10005A0001A
S701_15N3S
S701_25N3S
15A: AC-52a: 4-13 : 100 – 3000
25A: AC-52a: 4-13 : 100 – 3000
15A: AC-53a: 8-3 : 100 – 3000
25A: AC-53a: 8-3 : 100 – 3000
15A: AC-58a: 6-6 : 100 – 3000
25A: AC-58a: 6-6 : 100 – 3000
Position
Setting/Adjustment
Set the
Ramp-Up
switch to maximum.
Set the
Ramp-Down
switch to minimum.
Set the
Initial Torque
switch to minimum.
Apply control signal for a few seconds. If the load does not
rotate immediately, increment the
Initial Torque
and try
again. Repeat until the load starts to rotate immediately on
startup.
Adjust
Ramp-Up
time to the estimated start time (the
scale is in seconds) and start the motor.
Decrease the
Ramp-Up
time until mechanical surge is
observed during start.
Increase the time one step to eliminate the surge.
8,2
0
0
0
Position
Setting/Adjustment
Set the
Ramp-Up
switch to maximum.
Set the
Ramp-Down
switch to minimum.
Set the
Initial Torque
switch to minimum kick
start torque.
Apply control signal for a few seconds. If the load stops
right after the 200ms “kick”, increment the
Initial Torque
and try again. Repeat until the load continues to rotate
after the “kick”.
Adjust
Ramp-Up
time to the desired start time (the scale is
in seconds) and start the motor.
Position
Setting/Adjustment
Set the
Ramp-Down
switch to maximum.
Switch off the control voltage and observe any mechanical
surges on the load. If there are none, decrement
Ramp-
Down
switch and try again. Repeat until mechanical surge
on the load is observed.
Increase the time one step to eliminate the surge.
8,2
0
0
0
8,2
0
0
