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How does the "No Flow Detection" work on the ATV61 drives?

Issue:
How does the "No Flow Detection" work on the ATV61 drives?

Product Line:
ATV61

Environment:
All serial numbers for ATV61

Cause:
N/A

Resolution:
This function will stop the drive in case of No flow detection.
A sensor (all or nothing) will be connected to drive logical input. (LI1, LI2, ....)
This sensor on the logical input can be configured for positive or negative logic by [Conf.sensor flow] (LnS).
 
You need to define first the test zone for the No flow detection. This is parameter NFFT. The Zero flow detection will be active when speed will be between NFFT and HSP.
 
Another parameter NFST is used to define the starting time and avoid No flow tripping when the pump starts.
 
As soon as the speed is between NFFT and HSP + no flow sensor activated then the drive will generate NFF fault and motor will stop in freewheel.



 
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