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Can the ATV312 be programmed for a fallback speed in the event of a loss of the 4-20mA speed reference signal?
Issue:
ATV312 for a fallback speed configuration in the event of a loss of the 4-20mA speed reference signal

Product Line:
ATV31 and ATV312 drives

Environment:
All

Cause:
NA

Resolution:
Yes.  In the FLt menu, program LFL to LFF and then set LFF to the desired fall back speed in Hz.

Important note:
The fallback speed will take precedence, regardless of whether you are currently using the 4-20mA signal for speed control.

For example, if you are currently controlling speed with a potentiometer on AI1, and your 4-20mA signal drops on AI3, the drive will use the fallback speed even though you're currently not using the 4-20mA signal. Therefore, if you are not currently using the 4-20mA signal for speed control, you may want to set LFL to 'no', which will ignore 4-20mA signal loss.

Details on these parameters are found in the ATV312 Programming Manual on page 96.

manual screen shot
CTA-ID : 2061337

Schneider Electric Danmark

Bilag
ATV312_programming_manual_EN_BBV46385_04.pdf [1.84 MB]
ATV312 LFL and LFF parameters.JPG.jpg [120.32 KB]
Can the ATV312 be programmed for a fallback speed in the event of a loss of the 4-20mA speed reference signal?
Issue:
ATV312 for a fallback speed configuration in the event of a loss of the 4-20mA speed reference signal

Product Line:
ATV31 and ATV312 drives

Environment:
All 

Cause:
NA

Resolution:
Yes.  In the FLt menu, program LFL to LFF and then set LFF to the desired fall back speed in Hz.

Important note:
The fallback speed will take precedence, regardless of whether you are currently using the 4-20mA signal for speed control.

For example, if you are currently controlling speed with a potentiometer on AI1, and your 4-20mA signal drops on AI3, the drive will use the fallback speed even though you're currently not using the 4-20mA signal. Therefore, if you are not currently using the 4-20mA signal for speed control, you may want to set LFL to 'no', which will ignore 4-20mA signal loss.

Details on these parameters are found in the ATV312 Programming Manual on page 96. 

manual screen shot
CTA-ID : 2061337

Schneider Electric Danmark

Bilag
ATV312_programming_manual_EN_BBV46385_04.pdf [1.84 MB]
ATV312 LFL and LFF parameters.JPG.jpg [120.32 KB]
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