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How do I configure an external fault on an ATV312 series drive?

Issue:
How do I configure an external fault on an ATV312 series drive?

Product Line:
ATV312 

Environment:
All models, All serial numbers.

Cause:
Instructions not clear in current literature.

Resolution:
The External fault function on the ATV312 series drives is configured by three parameters.   Parameter ETF defines which input will be used to trigger the fault, Parameter LET is used to define if the fault is active when the input it high or low, and parameter EPL defines how the drive reacts when the external fault is triggered.

ETF can be assigned to any logic input, and if your access level (LAC under CTL menu) is set to L3, you can also assign it to bit 11 through 15 of your command word from a serial communication network.

LET is set to LO for active low triggering and HIG for active high triggering.

EPL, from the factory, is set to YES which causes the drive to enter a freewheel stop condition any time the external fault is triggered.  In freewheel stop condition, the drive shuts off power to the motor and allows the motor to coast to a stop on its own.

Other options for EPL parameter are :
Ignore :  No action is taken
RNP : The motor is stopped following the normal deceleration ramp as defined by the DEC parameter under the SET menu.
FST : The motor is stopped by a fast stop function. The motor is ramped down to a stop based on the DEC and DCF parameters.  The normal deceleration ramp (DEC) is divided by the ramp divider parameter (DCF) to achieve a quicker ramp down time.
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