Automation Direct DURApulse GS4 User Manual page 154

Chapter 4: AC Drive Parameters
Timing Charts for Y-∆ Starting:
What happens when Y-∆ switching occurs properly:
• The delta confirmation signal is generated, and the drive output continues
P2.20 Y-switch freqency
Motor speed / frequency
Wye-Connected Output
P3.17~P3.26 = 29
Wye-Connected Confirm Input
P3.03~P3.16 = 27
Delta-Connected Output
P3.17~P3.26 = 30
Delta-Connected Confirm Input
P3.03~P3.16 = 28
What happens when Y-∆ switching does not occur properly:
• In this example, the delta-connection confirmation input does not turn on� Two seconds after
Delay Time for Y-D Switching (P2�22) has elapsed, the GS4 drive sets a Y-D Connect Error (61)�
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ON
ON
Run Cmd.
GS4 drive output Frequency
Wye-Connected Output
P3.17~P3.26 = 29
Wye-Connected Con rm Input
P3.03~P3.16 = 27
Delta-Connected Output
P3.17~P3.26 = 30
Delta-Connected Confirm Input
P3.03~P3.16 = 28
Y- Connect Error (ydc) [Error #61]
DURA
pulse
If switch point is 60Hz, the accel
switch point is 62Hz
In this area, motor is in free run status,
AC motor drive stops outputting
P2.20 Delay Time for Y-connection / D-con-
nection (Min is 0.2 seconds)
P3.03~P3.16 = 27
ON
ON
ON
ON
2 seconds
delay time
P2.22
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Decel switch point
is 58Hz
Bandwidth is 2Hz
Motor speed will
decrease
by load inertia
ON
ON
Mechanical bounce time
Free run status
ON
ON