Mitsubishi Electric MELSERVO-J3 Series Manual page 343

Part 5: Common Reference Material
2) Instantaneous power failure time of control circuit power supply < [Pr. PX28 SEMI-F47 function -
Instantaneous power failure detection time]
Operation status differs depending on how bus voltage decrease.
a) When the bus voltage decreases lower than Undervoltage level within the instantaneous
power failure time of the control circuit power supply
[AL. 10 Undervoltage] occurs when the bus voltage decrease lower than Undervoltage level
regardless of the enabled instantaneous power failure tough drive.
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 control circuit power supply
ON (energization)
OFF (power failure)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
[Pr. PX28]
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