74 M OTO R C O N T RO L A N D PR OT E C T I O N U N IT M 10 X U S E R G U I D E
Control buttons
MD21 provides 7 control buttons while MD31 has
3 only.
Button Function Remark
Start 1 button, to start motor CW/N1
Start 2 button, to start motor CCW/N2
Stop button, to stop motor Also used to reset fault trip
Enter button, to enter selected menu Only in MD21
Down button, to show next messages or menus Only in MD21
Up button, to show past messages or menus Only in MD21
Back button, to exit selected menu or go back
one step.
Only in MD21
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MD21 display window
—
57 MD21 display window
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