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5.8 L: Protection Functions
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
309
5
Figure 5.98
Figure 5.98 Loss of Reference Function
To have a digital output trigger when frequency reference loss occurs, set H2-01, H2-02, or H2-03 to C.
C: Frequency reference loss on page 280
for details on setting the output function.
Parameter L4-05 selects the operation when a frequency reference loss is detected.
Setting 0: Stop
Drive follows the frequency reference (which is no longer present) and simply stops the motor.
Setting 1: Continue operation with reduced frequency reference
The drive will continue operation at the frequency reference value set in parameter L4-06. When the external frequency
reference value is restored, the operation is continued with the frequency reference.
■
L4-06: Frequency Reference at Reference Loss
Sets the frequency reference level the drive runs with when L4-05 = 1 and a reference loss was detected. The value is set
as a percentage of the frequency reference when the loss was detected.
■
L4-07: Speed Agree Detection Selection
Determines when frequency detection is active using parameters L4-01 through L4-04.
Setting 0: No detection during baseblock
Setting 1: Detection always enabled
◆
L5: Fault Restart
After a fault has occurred, this function attempts to automatically restart the motor and continue operation instead of
stopping.
The drive can be set up to perform a self-diagnostic check and resume the operation after a fault has occurred. If the
self-check is successful and the cause of the fault has disappeared, the drive restarts by first performing Speed Search.
Refer to
for details.
DANGER!
Never use the fault restart function in hoist-type applications.
The drive can attempt to restart itself following the faults listed below.
Use parameters L5-01 to L5-05 to set up automatic fault restart.
No.
Name
Setting Range
Default
L4-05
Frequency Reference Loss Detection Selection
0 or 1
0
No.
Name
Setting Range
Default
L4-06
Frequency Reference at Reference Loss
0.0 to 100.0%
80.0%
No.
Name
Setting Range
Default
L4-07
Speed Agree Detection Selection
0 or 1
0
Fault
Name
Fault
Name
Aov
Power Supply Overvoltage
oL1 Motor
Overload
GF Ground
Fault
oL3 Overtorque
1
LF Output
Phase
Loss
oL4
Overtorque Detection 2
LSo
LSo Fault
ov
Control Circuit Overvoltage
oC Overcurrent
STo
Pull-Out Detection
oH1
Overheat 1 (Heatsink Overheat)
–
–
100%
400 ms
Analog
frequency
reference
Loss of
Reference
output
time
10%
ON
OFF
SIEP_C710636_02B_1_0.book 309 ページ 2015年11月25日 水曜日 午後4時56分