2.8 L: Protection Functions
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide 211
n L4-06: Frequency Reference at Reference Loss
Sets the frequency reference level at which the drive runs 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.
n
L4-07: Speed Agreement Detection Selection
Determines when frequency detection is active using parameters L4-01 through L4-04.
Setting 0: Detection during run (no detection when drive output shut down)
Setting 1: Detection always enabled
u 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 b3: Speed Search on page 110 for details).
Note: 1. The wiring sequence should remove the Forward/Reverse command when a fault is triggered and output is shut off.
2. With the Forward/Reverse command removed, the drive can perform a self-diagnostic check and attempt to reset the fault
automatically.
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.
To output a signal during fault restart, set H2-01, H2-02, or H2-03 to 1E.
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 Agreement Detection Selection 0 or 1 0
Fault Name Fault Name
CF Control Fault LIN nn Link Fault Communication Fault
CFA nn CoF Current Offset Fault oH IGBT Overheating
CFA nn FU Fuse Blowout oL1 Motor Overload
CFA nn OC Overcurrent oL2 Drive Overload
CFA nn oH1 IGBT Overheating 1 oL3 Overtorque 1
CFA nn OV1 Overvoltage 1 oL4 Overtorque 2
CFA nn OV2 Overvoltage 2 Uv1 DC Bus Undervoltage <1>
GF Ground Fault
<1> When L2-01 is set to 1 or 2 (continue operation during momentary power loss ride-thru)
VUB Output Voltage Unbalance
LF Output Open Phase
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MV1000ParameterGuide_E_conditional.book 211 ページ ２０１３年１０月１１日 金曜日 午後８時１８分
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