Can two ATV212 drives receive a speed reference from one controller at the same time?
Issue:
Speed reference from one controller to two ATV212 drives.
Product Line:
Altivar 212 and Altivar 21
Environment:
All models and serial numbers
Cause:
None
Resolution:
Yes, depending on the controller signal capacity. The drive analog inputs could load down the signal from the controller. The VFD impedance on the current input (VIA) is 250 ohms. The impedance on the voltage input (VIA and VIB) is 30k ohms. If the controller output cannot maintain the signal, then consider applying the reference signal to one VFD and then using the analog output of the first drive to feed the analog input of the second drive.
Speed reference from one controller to two ATV212 drives.
Product Line:
Altivar 212 and Altivar 21
Environment:
All models and serial numbers
Cause:
None
Resolution:
Yes, depending on the controller signal capacity. The drive analog inputs could load down the signal from the controller. The VFD impedance on the current input (VIA) is 250 ohms. The impedance on the voltage input (VIA and VIB) is 30k ohms. If the controller output cannot maintain the signal, then consider applying the reference signal to one VFD and then using the analog output of the first drive to feed the analog input of the second drive.
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