B6: Dwell Function - YASKAWA V1000 Technical Manual

No.
b5-38
b5-39
n b5-40: Frequency Reference Monitor Content During PID
Sets the content on the frequency reference monitor display (U1-01) when PID control is active.
No.
b5-40 Frequency Reference Monitor Content During PID
Setting 0: Frequency Reference after PID
Monitor U1-01 displays the frequency reference increased or reduced for the PID output.
Setting 1: Frequency Reference
Monitor U1-01 displays the frequency reference value.
n b5-47: Reverse Operation Selection 2 by PID Output
Reverses operation selection when b5-01 is set to 3 or 4.
No.
b5-47 Reverse Operation Selection 2 by PID Output
Setting 0: Zero Limit when PID Output is a Negative Value
Setting 1: Reverse Operation when PID Output is a Negative Value (Zero Limit if the Reverse Operation Is
Prohibited by b1-04)
u

b6: Dwell Function

The reference hold or Dwell function is used to temporarily hold the output frequency at a set reference value, for a set
time, and then continue to ramp up or stop.
The Dwell at start function can be used when driving a permanent magnet motor in V/f Control, or a motor with a heavy
starting load. The pause in acceleration allows the PM motor rotor to align with the stator field of the motor, thus reducing
the starting current.
Dwell works as shown in the figure below.
Note: Using the Dwell function requires that the stopping method for the drive be set to "Ramp to Stop" (b1-03 = 0).
n b6-01/b6-02: Dwell Reference/Time at Start
b6-01 sets the frequency that is kept for the time set in b6-02 during acceleration.
No.
b6-01
b6-02
n b6-03/b6-04: Dwell Reference/Time at Stop
Parameter b6-03 sets the frequency that is kept for the time set in b6-04 during deceleration.
No.
b6-03
b6-04
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Name
PID Setpoint/Monitor User Display Value
PID Setpoint and Display Digits
Name
Name
OFF
Run Command
Output Frequency
Figure 5.21 Dwell Function at Start and Stop
Name
Dwell Reference at Start
Dwell Time at Start
Name
Dwell Reference at Stop
Dwell Time at Stop
ON OFF
b6-01
b6-03
b6-02 b6-04
5.2 b: Application
Setting Range
Determined by
0 to 60000
Determined by
0 to 3
Setting Range
0 or 1
Setting Range
0 or 1
Setting Range
0.0 to 400.0 Hz
0.0 to 10.0 s
Setting Range
0.0 to 400.0 Hz
0.0 to 10.0 s
Default
b5-20
b5-20
Default
0
Default
1
5
Default
0.0 Hz
0.0 s
Default
0.0 Hz
0.0 s
139