12.3 b: Application
684 YASKAWA SIEPC71061705H GA700 Series Technical Manual
For conveyor applications, the Dwell function also lets the drive interlock the output frequency and a delay time
for the holding brake on the load side.
The Dwell function momentarily stops during acceleration to prevent a PM motor from stepping out. Figure 12.41
shows how the Dwell function works.
Note:
When you use the Dwell function at stop, set b1-03 = 0 [Stopping Method Selection = Ramp to Stop].
Figure 12.41 Time Chart for the Dwell Function at Start/Stop
■ b6-01: Dwell Reference at Start
No.
(Hex.)
Name Description
Default
(Range)
b6-01
(01B6)
Dwell Reference at Start
Sets the output frequency that the drive will hold momentarily when the motor starts.
0.0
(Determined by A1-02)
When the drive accelerates to the output frequency set in b6-01, it holds that frequency for the time set in b6-02
[Dwell Time at Start], and starts to accelerate again.
■ b6-02: Dwell Time at Start
No.
(Hex.)
Name Description
Default
(Range)
b6-02
(01B7)
Dwell Time at Start
Sets the length of time that the drive will hold the output frequency when the motor starts.
0.0 s
(0.0 - 10.0 s)
■ b6-03: Dwell Reference at Stop
No.
(Hex.)
Name Description
Default
(Range)
b6-03
(01B8)
Dwell Reference at Stop
Sets the output frequency that the drive will hold momentarily when ramping to stop the motor.
0.0
(Determined by A1-02)
When the drive decelerates to the output frequency set in b6-03, it holds that frequency for the time set in b6-04
[Dwell Time at Stop] and starts to decelerate again.
■ b6-04: Dwell Time at Stop
No.
(Hex.)
Name Description
Default
(Range)
b6-04
(01B9)
Dwell Time at Stop
Sets the length of time for the drive to hold the output frequency when ramping to stop the motor.
0.0 s
(0.0 - 10.0 s)
◆ b7: Droop Control
Droop control automatically balances the load level between two motors that operate the same load.
Droop control decreases motor speed as the load changes. You must enable the Droop control function for each
motor it is operating.
To decrease motor speed, the Droop control function decreases the speed reference when an increase in the load
increases the torque reference. To increase motor speed, the Droop control function increases the speed reference
when a decrease in the load decreases the torque reference. The Droop control function adjusts motor speed as the
torque reference changes to balance the load between the motors.
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