Winding Selection Operation - YASKAWA VS-626M5 Instruction Manual

7.4 Winding Selection Operation

The timing chart for switching from low-speed to high-speed windings is shown in the following diagram.
Winding selection signal (CHW)
Gate block
Magnetic contactor for winding
selection
Winding
Auxiliary
contact
Winding selection completion signal
(CHWE)
Control constant
Motor current
Note: The auxiliary contact (2CN terminals 12-13) of the magnetic contactor for winding selec-
Fig 7.3
ON
2CN
10-11
OFF
2CN
12-13
ON
Low-speed constant
Preparing to switch
Reference
tion can be checked using control signal U1-09. When the auxiliary contact is ON, CHWA
of U1-09 is lit.
Winding Selection Timing Chart
7 -5
Approx. 170 ms
OFF
Gate block
ON
OFF
ON
High-speed constant
100 ms
Approx. 30 ms
Switching Reset after switching
Completed
7.4 Winding Selection Operation
7