L5: Auto Restart - YASKAWA GA700 Technical Manual

11.9 L: Protection Function
Sets the speed detection width or motor speed detection width when H2-01 to H2-04 = 13, 14, 15, 16 [MFDO
Function Select = Speed Agree 2, User-set Speed Agree 2, Frequency Detection 3, Frequency Detection 4].
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L4-05: FreqReference Loss Detect Select
No.
Name
(Hex.)
L4-05 FreqReference Loss
Detect Select
(049D)
Enables the detection of a loss of an analog frequency reference when the frequency reference is input from the
MFAI terminals (A1, A2, and A3). Set H2-01 to H2-04 = C [MFDO Function Select = Frequency Reference
Loss] to enable this function.
Frequency reference loss is detected when the frequency reference drops below 10% within 400 ms.
0 : Stop
The drive follows the frequency reference and stops the motor.
1 : Run@L4-06PrevRef
The drive will continue operation at the frequency reference value set to L4-06 [FreqReference at Reference
Loss]. When the external frequency reference value is restored, the operation is continued with the frequency
reference.
■
L4-06: FreqReference at Reference Loss
No.
Name
(Hex.)
L4-06 FreqReference at
Reference Loss
(04C2)
This parameter is enabled when L4-05 = 1 [FreqReference Loss Detect Select = Run@L4-06PrevRef].
■
L4-07: Speed Agree Detection Selection
No.
Name
(Hex.)
L4-07 Speed Agree
Detection Selection
(0470)
0 : No detection during baseblock
Detects the frequency while the drive is operating. The frequency is not detected when the drive shuts off its
output.
1 : Detection always enabled
◆

L5: Auto Restart

The Auto Restart function attempts to keep machines from stopping when a transient fault is detected.
The drive can perform a self-diagnostic check and resume the operation after a fault has occurred. If the cause of
the fault has disappeared, the drive restarts by first performing Speed Search instead of stopping. A fault history is
not recorded. Use L5-02 [AutoRestartFaultOutputOpeSelect] to select the operation of fault relay signals during
Auto Restart operation.
854
V/f CL-V/f OLV CLV
Selects the operation when a loss of the frequency reference is detected.
Figure 11.133 Detection of Frequency Reference Loss
V/f CL-V/f OLV CLV
Sets the frequency reference as a percentage that is applicable when not
stopping the drive so that it continues to operate after a loss of the frequency
reference value is detected. The value is set as a percentage of the frequency
reference before the loss was detected.
V/f CL-V/f OLV CLV
Selects the condition for activating speed detection.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default
(Range)
0
(0, 1)
Default
(Range)
80.0%
(0.0 - 100.0%)
Default
(Range)
0
(0, 1)