Mitsubishi Electric MELSERVO-J3 Series Manual page 344

Part 5: Common Reference Material
b) When the bus voltage does not decrease lower than Undervoltage level within the
instantaneous power failure time of the control circuit power supply
The operation continues without alarming.
Control circuit
power supply
Bus voltage
Undervoltage level
(Note)
ALM
(Malfunction)
WNG
(Warning)
MTTR
(During tough drive)
MBR
(Electromagnetic
brake interlock)
Base circuit
Note Refer to table 5.8 for the undervoltage level.
Instantaneous power failure time of the
ON (energization)
OFF (power failure)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
control circuit power supply
[Pr. PX28]
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