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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).
b6-01
b6-03
b6-02 b6-04
Run Command
Output Frequency
ON
OFFOFF
Figure 5.22 Dwell Function at Start and Stop
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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. Name Setting Range Default
b6-01 Dwell Reference at Start 0.0 to 400.0 Hz 0.0 Hz
b6-02 Dwell Time at Start 0.0 to 10.0 s 0.0 s
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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. Name Setting Range Default
b6-03 Dwell Reference at Stop 0.0 to 400.0 Hz 0.0 Hz
b6-04 Dwell Time at Stop 0.0 to 10.0 s 0.0 s
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b8: Energy Saving
The Energy Saving feature improves overall system operating efficiency by operating the motor at its most efficient level.
This is accomplished by continuously monitoring the motor load and controlling the motor so that it always operates near
its rated slip frequency.
Note: Energy Saving is mainly designed for applications with variable torque (Normal Duty) but is not appropriate for applications where the
load may suddenly increase.
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b8-01: Energy Saving Control Selection
Enables or disables the Energy Saving function.
No. Parameter Name Setting Range Default
b8-01 Energy Saving Control Selection 0 or 1 0
Setting 0: Disabled
Setting 1: Enabled
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b8-02: Energy Saving Gain (OLV only)
Sets the gain that is used to for magnetizing current reduction during Energy Saving. A higher value results in lower
magnetization of the motor and thereby less energy consumption. However, if b8-02 is too high the motor might stall.
No. Name Setting Range Default
b8-02 Energy Saving Gain 0.00 to 10.0 0.7
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b8-03: Energy Saving Control Filter Time Constant (OLV only)
Parameter b8-03 sets the response time for Energy Saving. Although lowering this value allows for a quicker response,
instability may result if it is too low.
5.2
b: Application
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
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5
Parameter Details
7/16/2008-13:23
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