11.3 b: Application
740 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
When b5-09 = 0, and the PID feedback is less than the value of “PID setpoint value - b5-94” for a time longer
than the value of b5-96, the drive will exit sleep and start operation again. When b5-09 = 1, and the PID
feedback is more than the value of “PID setpoint value + b5-94” for a time longer than the setting value of b5-
96, the drive will exit sleep and start operation again.
■ b5-95: EZ Sleep Wake-up Mode
No.
(Hex.)
Name Description
Default
(Range)
b5-95
(0B95)
EZ Sleep Wake-up
Mode
Sets the wake-up mode to use when exiting Sleep Mode.
0
(0, 1)
0 : Absolute
1 : Setpoint Delta
■ b5-96: EZ Sleep Wake-up Time
No.
(Hex.)
Name Description
Default
(Range)
b5-96
(0B96)
EZ Sleep Wake-up
Time
Sets the EZ Wake-up time.
1.0 s
(0.0 - 1000.0 s)
When the PID feedback is less than the value of b5-94 [EZ Sleep Wake-up Level] continuously for the time set in
b5-96, the drive will exit sleep and start operation again.
◆ b6: Dwell Function
The Dwell function momentarily holds the output frequency at start and stop.
This prevents motor speed loss when you start and stop heavy loads. The Dwell function is also enabled when
backlash on the machine side causes sudden movement at the start of acceleration and deceleration.
At the start of acceleration, the drive uses the output frequency and acceleration time set for the Dwell function to
automatically operate at low speed to minimize the effects of backlash. Then, the drive can accelerate again. The
Dwell function operates the same for deceleration.
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 11.41
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 11.41 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.
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