GE Industrial Solutions AF-650 GP Drive Panel - Manual (Page 12)

12
Hand/Off/Auto Selector
This selector is also referred to as the H-O-A switch. In the “Off” position power
will be removed from the motor in both bypass and drive modes of operation. It
should be noted that this will not cause AC input power to be removed from the
drive. To remove drive input power the Test/Isolate/Normal switch, if provided,
should be placed in the “Isolate” position.
In “Hand” mode, power will be applied to the motor from either the drive or the
AC
line according to the Drive/Off/Bypass selector. In this mode the inverter’s
frequency reference is determined by the setting of speed pot on the panel if
ordered or via the Keypad.
In “Auto” mode, power will be applied to the motor only when a connection is
made between the two remote run contacts on the customer terminal board
inside the panel enclosure. In this mode the inverter’s frequency reference is
determined by a customer supplied 0-10 VDC or 4-20 mA signal.
Hand - Off - Auto on Drive Keypad
All AF-650 GP Drive Panels include a keypad for programming and operation of
the drive and includes Hand, Off, and Auto operation keys / buttons. When
shipped from the factory, the Hand, Off and Auto buttons are enabled. Pressing
the Off button while the drive is running will cause the drive to decelerate and
shut off regardless of the positions of the panel’s selector switches. To resume
normal operations (that is control the unit from its selector switches and analog
signal) press the Auto Button one time.
For more details on the Hand, Off, and Auto operation keys, refer to manuals
DET-618
Start/Stop Operator This Operator is used for Drive Start/Stop command.
DEH40652
– Page 5 AN 11-2021 Rev 06, 12/16/2011
NOTE: In the event of a drive fault the motor will continue to operate
in bypass mode as long as the AF 650 GP drive’s fault output stays
in the energized state. This means that if the Test/Isolate/Normal
switch is moved to the “Isolate” position that the motor will stop since
removal of drive power will cause the fault output to de-energize.
Therefore, if it is desired to service the drive without interruption of
power to the motor, turn the Drive/Off/Bypass selector to the “Bypass”
position prior to removing power from the drive.
WARNING: Enabling and using the Hand operation key may cause
control inputs to drive to be ignored and may result in unintended
operations / starting of the drive unit.