ATV312 for a fallback speed configuration in the event of a loss of the 4-20mA speed reference signal
ATV31 and ATV312 drives
Yes. In the FLt menu, program LFL to LFF and then set LFF to the desired fall back speed in Hz.
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.
CTA-ID : 2061337