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Why does the ATV66 go to 60 Hz when pushing the down arrow key past 0 in keypad command?

This is possible. There is a possibilty that an operator could unintentionally set the speed reference to the high speed when pushing the down arrow key.
If this could cause an undesirable effect on the equipment or personnel, use the decimal point to bring up the ``speed`` dialog box and then use the numbers and enter key to select the desired freqeuncy. This would eliminate the possibility of overshooting the 0 and going to high speed.

CTA-ID : 2015299
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