YASKAWA A1000 Technical Manual page 153

The wait time t is determined by the output frequency when the Run command is removed and by the active deceleration
time.
Figure 5.10
Setting 9: Simple Positioning Stop
This method of stopping the motor always decelerates the same distance to stop as shown in
distance S1 is calculated using the maximum output frequency setting E1-04 and the selected deceleration time. If the
drive is stopped from a frequency lower than the maximum speed it keeps the current speed. When the distance traveled
becomes equal to S1 - S2, the drive decelerates to stop using the current deceleration time. The stopping accuracy can be
adjusted using the positioning gain set in parameter d4-12.
Figure 5.11
Motor speed
Max. output
frequency
Run command
Precautions when using Simple Positioning:
• Changing the deceleration time during the deceleration will result in inaccurate positioning as the calculation considers
the deceleration time that was active only when the Run command was removed.
• The Dwell function must be deactivated (b6-03 and b6-04 = 0).
• The KEB function cannot be used (H1- must be different than 65/66/7A/7B).
• The Stall Prevention during stop must be deactivated (L3-04 = 0). For regenerative loads a braking option might be
necessary.
• The overvoltage suppression must be disabled (L3-11 = 0).
• High Slip Braking must be deactivated (H1- must be different from 68).
• The S-curves at deceleration start and deceleration end must be inactive (C2-03/04 = 0).
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Run wait time t
Active deceleration time
Min Baseblock Time (L2-03)
Min output
frequency
Figure 5.10 Run Wait Time Depending on Output Frequency
Normal Deceleration
Deceleration
distance
S1
S2
Set deceleration time
Figure 5.11 Simple Positioning Deceleration
Output frequency
when Stop command
was entered
Simple Positioning
Motor speed
Deceleration
Max. output
frequency
S1
t
Set deceleration time
Run command
5.2 b: Application
100%
(Max output
frequency)
Figure 5.11. The stopping
distance
S1
t
5
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