Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 112)

4-30 LiquiFlo AC Drive, Software Reference Version 6.4
• If P.025 = 1, pressing the STOP/RESET key or giving an external stop command will
cause the motor to ramp to rest within a time equal to or greater than the preset
deceleration time (P.022).
If a function loss occurs, the motor will coast to rest. If P.026 = 0, a function loss fault
will be generated, and FL will be displayed.
When P.027 is set to 0, the forward/reverse input allows forward or reverse rotation of
the motor.
When P.027 is set to 1, reverse rotation of the motor is prohibited and the
forward/reverse selection from the front panel or serial port is set to forward. Note that
reverse rotation is prohibited regardless of the polarity of the speed reference input.
When P.027 is set to 2, the state of the forward/reverse input is latched when the
motor is started (RUNNING LED is on). Direction changes requested from any control
source after the motor is started are ignored. Note, however, that this selection will not
inhibit a motor direction change due to a change in the polarity of the speed reference
input.
In V/Hz or SVC regulation, setting H.016 (Sync Mode Direction) or U.031 (SVC Sync
Direction) to any value but F or OFF may cause the motor to operate in the reverse
direction briefly regardless of the setting in P.027.
P.026 Function Loss Response
This parameter
specifies how the
drive will respond to
an open circuit
between terminal
strip inputs 16 and
20. Parameter Range: 0 = Generate a fault (IET) and coast to rest
1 = Coast to rest without a fault
Default Setting: 0
Parameter Type: Tunable
Refer also to parameters: P.013 Output Relay Configuration
P.027 Forward/Reverse Configuration
This parameter
specifies how the
motor responds to
forward or reverse
inputs from any
control source. Parameter Range: 0 = Forward or reverse enabled from the selected
control source
1 = Reverse disabled from the selected control
source
2 = The state of the forward/reverse input is latched
when the motor is started
Default Setting: 0
Parameter Type: Tunable
Refer also to parameters: N/A