5.2 b: Application
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 137
Parameter Details
5
If used with induction motors, the Dwell function can help prevent speed loss when starting and stopping a heavy load. If
running a PM motor in V/f control, the pause in acceleration allows the PM motor rotor to align with the stator field of
the motor, thus reducing the starting current.
The figure below shows how the Dwell function works.
Note: Using the Dwell function requires that the stopping method for the drive be set to “Ramp to stop” (b1-03 = 0).
Figure 5.25
Figure 5.25 Dwell Function at Start and Stop
n b6-01, b6-02: Dwell Reference, Dwell Time at Start
b6-01 determines the frequency that is held or the time set in b6-02 during acceleration.
n
b6-03, b6-04: Dwell Reference, Dwell Time at Stop
Parameter b6-03 determines the frequency that is held for the time set in b6-04 during deceleration.
u b8: Energy Saving
The Energy Saving feature improves overall system operating efficiency by operating the motor at its most efficient
level.
Note: 1. Energy Saving is not designed for applications that experience instantaneous heavy loads or applications that rarely operate with light
load conditions.
2. As the performance of the Energy Saving function strongly depends on the accuracy of the motor data, always perform Auto-Tuning
and make sure the motor data has been entered correctly before using this function.
n b8-01: Energy Saving Control Selection
Enables or disables the Energy Saving function.
Setting 0: Disabled
Setting 1: Enabled
n b8-02: Energy Saving Gain (OLV, CLV)
Sets the gain level for Energy Saving. A higher value results in lower magnetization of the motor and thereby less energy
consumption. However, if b8-02 is too low, the motor may stall.
No. Name Setting Range Default
b6-01
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed as a percent (0.0 to 100.0%) instead of in Hz. The default
setting is 0.0%.
Dwell Reference at Start
0.0 to 400.0 Hz
<1> Determined by A1-02 <1>
b6-02
Dwell Time at Start
0.0 to 10.0 s 0.0 s
No. Name Setting Range Default
b6-03
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed as a percent (0.0 to 100.0%) instead of in Hz. The default
setting is 0.0%.
Dwell Reference at Stop
0.0 to 400.0 Hz
<1> Determined by A1-02 <1>
b6-04
Dwell Time at Stop
0.0 to 10.0 s 0.0 s
No. Parameter Name Setting Range Default
b8-01 Energy Saving Control Selection 0 or 1 Determined by A1-02
No. Name Setting Range Default
b8-02 Energy Saving Gain 0.0 to 10.0 Determined by A1-02
b6-01
b6-03
b6-02 b6-04
Run Command
Output Frequency
ON
OFFOFF
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