YASKAWA OYMC V1000, Programming Manual

Page: 44 / 408

1.2 b: Application
44 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
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 1.11
Figure 1.11 Simple Positioning Deceleration
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 can not 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 = 1)
• 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)
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b1-04: Reverse Operation Selection
For some applications, reverse motor rotation is not appropriate and may even cause
problems (e.g., air handling units, pumps, etc.). Setting parameter b1-04 to 1 instructs the
drive to ignore any Reverse run commands.
Setting 0: Reverse Operation Enabled
Possible to operate the motor in both forward and reverse directions.
No. Parameter Name Setting Range Default
b1-04 Reverse Operation Selection 0 or 1 0
Max. output
frequency
Deceleration
distance
S1
S1
Set deceleration time
Motor speed
t
Run command
Max. output
frequency
Deceleration
distance
S1
Set deceleration time
Motor speed
t
Run command
S2
Normal Deceleration
Simple Positioning