Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 987
The drive can do a self-diagnostic check and continue the operation after a fault. 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.
The drive can do Auto Restart when these faults occur:
Note:
You can disable Auto Restart for some faults if you must not restart the machine after the fault with parameters L5-07 and L5-08.
Table 12.69 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.
■ L5-02: Fault Contact at Restart Select
No.
(Hex.)
Name Description
Default
(Range)
L5-02
(049F)
Fault Contact at Restart
Select
Sets the function that sends signals to the MFDO terminal set for Fault [H2-xx = E] while the drive
is automatically restarting.
0
(0, 1)
0 : Active Only when Not Restarting
1 : Always Active
■ L5-03: Continuous Method Max Restart T
No.
(Hex.)
Name Description
Default
(Range)
L5-03
(04A0)
Continuous Method Max
Restart T
Sets the time for which the drive will try to restart. If the drive cannot restart inthe time set in L5-03,
the drive detects a fault. This is available when L5-05 = 0 [Auto-Restart Method = Continuous/
Immediate Attempts].
10.0 s
(0.5 - 180.0 s)
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