5.2 b: Application
170 YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
◆ b6: Dwell Function
The Dwell function temporarily holds the frequency reference at a predefined value for a set time then continues
accelerating or decelerating.
Figure 5.3 shows how the Dwell function works.
Note: Set the stopping method to "Ramp to Stop" (b1-03 = 0) to use the Dwell function.
Figure 5. 3
Figure 5.3 Dwell Function at Start and Stop
■ b6-01, b6-02: Dwell Speed, Dwell Time at Start
Parameter b6-01 determines the speed that is held or the time set in b6-02 during acceleration.
■
b6-03, b6-04: Dwell Speed, Dwell Time at Stop
Parameter b6-03 determines the speed that is held for the time set in b6-04 during deceleration.
◆ b7: Droop Control (CLV/PM)
Droop control automatically balances the load level between two motors driving the same load. The drive in which Droop
control is activated shifts the load from one motor to another by automatically reducing the speed when the torque
reference rises, and automatically increasing the speed when the torque reference falls.
Note: Disable Inertia Compensation (n5-01 = 0) whenever using Droop control.
■ b7-01: Droop Control Gain
Sets the amount of speed reduction when the torque reference is 100%. The gain is set as a percentage of the maximum
output speed. A setting of 0.0% disables the Droop control function.
Figure 5. 4
Figure 5.4 Droop Control Gain
No. Parameter Name Setting Range Default
b6-01 Dwell Speed at Start
<1> A setting of 100% is equal to the maximum speed.
0.0 to 100.0%
<1>
0.0%
b6-02 Dwell Time at Start 0.0 to 10.0 s 0.0 s
No. Parameter Name Setting Range Default
b6-03 Dwell Speed at Stop
<1> A setting of 100% is equal to the maximum speed.
0.0 to 100.0%
<1>
0.0%
b6-04 Dwell Time at Stop 0.0 to 10.0 s 0.0 s
No. Parameter Name Setting Range Default
b7-01 Droop Control Gain 0.0 to 100.0% 0.0%
b6-01
b6-03
b6-02 b6-04
Up/Down Command
Output Speed
ON
OFFOFF
Speed
Torque
100%
Speed reference
Droop control gain
b7-01
0
SIEP_C710616_38F_5_0.book 170 ページ ２０１５年１１月９日 月曜日 午後３時３６分
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