Yaskawa Varispeed 626M5 - Manual (Page 128)

7.4 Winding Selection Operation
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7.4 Winding Selection Operation
The timing chart for switching from low-speed to high-speed windings is shown in the following diagram.
Approx. 170 ms
Winding selection signal (CHW)
Gate block
Gate block
Magnetic contactor for winding
selection
Winding
Auxiliary
contact
Winding selection completion signal
(CHWE)
Control constant
Motor current
Low-speed constant High-speed constant
Approx. 30 ms
Preparing to switch Switching Reset after switching
Reference Completed
ON OFF
OFF
OFF
ON
ON ON
100 ms
2CN
2CN
10-11
12-13
Note: The auxiliary contact (2CN terminals 12-13) of the magnetic contactor for winding selec-
tion can be checked using control signal U1-09. When the auxiliary contact is ON, CHWA
of U1-09 is lit.
Fig 7.3 Winding Selection Timing Chart
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