Jog Operation - GE ASTAT XL User Manual

To configure the ASTAT XL for brake operation:
1. Set parameter 2I for the desired stopping time duration (1). This is the total braking time and must
be set sufficiently longer than the brake time (parameter 15H) to allow the pre-braking stage to
reduce motor speed to approximately 70%. If the stop time is too short, braking will not be
successful and the motor will coast to stop.
2. Set Brake Time (parameter 15H) to approximately one quarter of the programmed Stop Time. This
sets the time for the Full Brake stage (2).
3. Adjust the Brake Torque (parameter 15G) so that the desired stopping performance is achieved. If
set too low, the motor will not stop completely and will coast to stop by the end of the braking
period.
100%
75%
50%
25%
0%
CAUTION
When using DC brake, the mains supply must be connected to the soft starter (input terminals
L1, L2, L3) in positive phase sequence and parameter 4B Phase Sequence must be set to
Positive Only.
NOTE
For loads which may vary between braking cycles, install a zero speed sensor to ensure that
the soft starter ends DC braking when the motor stops. This avoids unnecessary heating of
the motor.
For more information on using the ASTAT XL with an external speed sensor (eg for
applications with variable load during the braking cycle), see DC Brake with External Zero
Speed Sensor on page 63.
7.7

Jog Operation

Jog runs the motor at reduced speed, to allow alignment of the load or to assist servicing. The motor
can be jogged in either forward or reverse direction.
The maximum available torque for jog forward is approximately 50%~75% of motor full load torque
(FLT) depending on the motor. The torque when the motor is jogged in reverse is approximately 25%
to 50% of FLT.
Parameter 15F Jog Torque controls how much of the maximum available jog torque the soft starter will
apply to the motor.
NOTE
Setting parameter 15F above 50% may cause increased shaft vibration.
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ASTAT XL User Manual
3
2
1
Time
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
05723.D
DET-812
Fout! Stijl niet gedefinieerd.
1: Stop time (parameter 2I)
2: Brake time (parameter 15H)
3: Coast to stop time
1. Motor FLT
2. Jog forward maximum torque
3. Jog reverse maximum torque