5
Application Features
For further information visit: www.abpowerflex.com or www.ab.com/support/abdrives
Configurable Keypad Hand-Off-Auto Functions
Parameter P042 [Auto Mode] defines the operating configuration of the
control keys.
Hand-Off-Auto Configuration
Hand Mode: Start command and speed reference come from the integral
keypad. Auto key switches control from Hand mode to Auto
mode in a bumpless transfer as long as there is an active run
command.
Auto Mode: Start command is defined by P036 [Start Source] (keypad,
terminal block, comm port) and speed reference is defined
by P038 [Speed Reference] (analog inputs, preset frequency,
comm port). Start/Hand key switches control and speed
reference to the integral keypad in a bumpless transfer.
Local/Remote Configuration
Local Mode: Start command and speed reference come from the integral keypad. Auto key stops the drive and the drive
switches to Remote mode.
Remote Mode:Start command is defined by P036 [Start Source] and speed reference is defined by P038 [Speed
Reference]. Auto key stops the drive and the drive switches to Local mode.
Auto/Manual Configuration
Manual Mode:Start command is defined by P036 [Start Source] and the speed reference comes from the integral keypad.
Auto key toggles frequency control to Auto mode in a bumpless transfer.
Auto Mode: Start command is defined by P036 [Start Source] and speed reference is defined by P038 [Speed
Reference]. Auto key switches frequency control to the integral keypad in a bumpless transfer.
Connectivity to Building Fire and Life Safety Systems
Purge
The PowerFlex 400 drive has an input which can be wired to a fire control panel or other fire/life safety systems allowing
control of the drive to be overridden. A purge input will start the drive at a programmable purge speed regardless of the
selected start source. Purge can occur and is operational at any time whether the drive is running or stopped. A purge
command will take precedence over a stop command from the comm port/network and over a “SW Enable” command from
the terminal block.
Fire/Freeze Status
The PowerFlex 400 drive can be tied into fire alarm systems or interlocked with cooling coils via a “Function Loss” input on
the drive. Upon opening of the input, the drive will immediately coast to a stop if running and issue a fault. The drive will
only be allowed to restart once the alarm state is cleared and the drive fault is reset.
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