Parameter Details
11
11.9 L: Protection Functions
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 967
■ L4-07: Speed Agree Detection Selection
No.
(Hex.)
Name Description
Default
(Range)
L4-07
(0470)
Speed Agree
Detection Selection
Sets the condition that activates speed detection.
0
(0, 1)
0 : No Detection during Baseblock
Detects the frequency while the drive is operating. When the drive turns off its output, it will not detect frequency.
1 : Detection Always Enabled
◆ L5: Fault Restart
The Auto Restart function tries to keep machines operating when the drive detects a transient fault.
The drive can do a self-diagnostic check and continue the operation after a fault has occurred. If the cause of the
fault goes away, the drive does speed search and restarts. It will not stop and the drive will not record a fault
history. Use L5-02 [Fault Contact at Restart Select] to select the operation of fault relay signals during Auto
Restart operation.
Sets if the drive will do Auto Restart and the number of times the drive will try to do Auto Restart in a set time. If
the number of Auto Restart tries is more than the set value during the set time, drive output shuts off and operation
stops. If this happens, remove the cause of the fault and manually restart the drive.
DANGER! Sudden Movement Hazard. Failure to obey can cause death or serious injury. Do not use the fault restart function in
hoist or lifting applications.
The drive can do Auto Restart when these faults occur:
Note:
You can disable Auto Restart for faults if you must not restart the machine after the fault.
Table 11.73 List of Faults during which Auto Restart is Available
Fault Name
Parameters to
Disable Auto
Restart
GF Ground Fault L5-08
LF Output Phase Loss -
oC Overcurrent -
oH1 Heatsink Overheat L5-08
oL1 Motor Overload L5-07
oL2 Drive Overload L5-07
oL3 Overtorque Detection
1
L5-07
oL4 Overtorque Detection
2
L5-07
Fault Name
Parameters to
Disable Auto
Restart
ov Overvoltage L5-08
PF Input Phase Loss -
rH Braking Resistor
Overheat
-
rr Dynamic Braking
Transistor Fault
-
STPo Motor Step-Out
Detected
-
Uv1 DC Bus
Undervoltage
*1
L5-08
*1 Uv1 is the target for the auto restart process when L2-01 = 1, 2, 3, or 4 [Power Loss Ride Through Select = Enabled for L2-02 Time,
Enabled while CPU Power Active, Kinetic Energy Backup: L2-02, or Kinetic Energy Backup: CPU Power].
■ L5-01: Number of Auto-Restart Attempts
No.
(Hex.)
Name Description
Default
(Range)
L5-01
(049E)
Number of Auto-
Restart Attempts
Sets the number of times that the drive will try to restart.
0
(0 - 10 times)
The drive resets the number of Auto Restart attempts to 0 in these conditions:
• The drive operates correctly for 10 minutes after a fault restart.
• When you manually clear a fault after the drive triggers protective functions.
• When you re-energize the drive.
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