When the drive is operating or is prepared to accept a Run command, the MFDO terminal to which Drive Ready [H2-xx = 6] is set will enter the ON status.
In these conditions, Drive Ready is OFF and the drive ignores Run commands:
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The drive is de-energized
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During a fault
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There is problem with the control power supply
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There is a parameter setting error that will not let the drive run, although a Run command is entered
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An overvoltage or undervoltage fault occurs when the Run command is entered
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The drive is in Programming Mode.