Yaskawa iQpump Micro Quick Start - Manual (Page 72)

Output frequency when
Stop command was entered
100%
(Maximum output
frequency)
10%
DC Injection braking time
b2-04×10
b2-04
Figure i.36 DC Injection Braking Time Depending on Output Frequency
Note: If an overcurrent (oC) fault occurs during DC Injection Braking to Stop, lengthen the minimum baseblock time (L2-03) until the fault no
longer occurs.
Setting 3: Coast to Stop with Timer (Used for Back Spin Control on Vertical Turbine Pumps)
When the Run command is removed, the drive coasts to a stop. If parameter b1-11 = 0, the coast-timer (Run Delay at Stop)
becomes a value determined by a combination of output frequency and C1-02. However, if b1-11 > 0, the Run Delay at Stop
timer is set to b1-11. If the Run command is reissued during the Run Delay at Stop timer time, the drive WILL restart when
the timer expires without the need to re-cycle the Run command. The Run Delay at Stop timer will operate for both AUTO
Mode and HAND Mode. The Run Delay at Stop timer will still operate when the drive goes to sleep and then wakes up. During
the Run Delay at Stop timer execution, the HOA keypad will display a Start Delay message.
Drive output shut off
Run wait time t
Run command
Output
frequency
ON ON ON OFF OFF
Figure i.37 Coast to Stop with Timer
The wait time t is determined by the output frequency when the Run command is removed and by the active deceleration time.
Min output
frequency
100%
(Max output
frequency)
Output frequency
when Stop command
was entered
Run wait time t
Active deceleration time
Momentary Power Loss
Minimum Baseblock
Time (L2-03)
Figure i.38 Run Wait Time Depending on Output Frequency
n b3-01: Speed Search Selection at Start
Determines if Speed Search is automatically performed when a Run command is issued.
No. Parameter Name Setting Range Default
b3-01 Speed Search Selection at Start 0, 1 0
Setting 0: Disabled
This setting starts operating the drive at the minimum output frequency when the Run command is entered. If external Speed
Search 1 or 2 is already enabled by a digital input, the drive will start operating with Speed Search.
i.6 Start-Up Programming and Operation
72 YASKAWA TOEP YAIQPM 02B YASKAWA AC Drive - iQpump Micro Quick Start Guide