|
No.
(Hex.)
|
Name
|
Description
|
Default
(Range)
|
|
L4-05
(049D)
|
Fref Loss Detection Selection
|
    
Sets the operation when the drive detects a loss of frequency reference.
|
0
(0, 1)
|
Enables the detection of a loss of an analog frequency reference when MFAI terminals (A1 and A2) input the frequency reference. Set H2-01 to H2-03 = C [MFDO Function Selection = Frequency Reference Loss] to enable this function.
If the frequency reference is less than 10% in 400 ms, the drive detects frequency reference loss.
Figure 1. Detection of Frequency Reference Loss
- 0
- Stop
-
The drive follows the frequency reference and stops the motor.
- 1
- Run at (L4-06 x Last Reference)
-
The drive continues to operate at the frequency reference value set in L4-06 [FreqReference at Reference Loss]. When you return the external frequency reference value, the drive continues to operate with the frequency reference.