Yaskawa MP920 User's Manual Design - Manual (Page 357)

6.2 System Startup Procedure
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c) Double-click Discrete Input1 in the REG-No column, and then input 0 after IW.
d) Click the button on the right side of Discrete Input1 in the Scan column, and then
click High.
e) Repeat steps c) and d) for Discrete Input2 to Discrete Input4 to set the values as
shown below.