Mitsubishi Electric MELSERVO-J3 Series Manual page 342

Part 5: Common Reference Material
1) Instantaneous power failure time of control circuit power supply > [Pr. PX28 SEMI-F47 function -
Instantaneous power failure detection time]
The alarm occurs when the instantaneous power failure time of the control circuit power supply
exceeds [Pr. PX28 SEMI-F47 function - Instantaneous power failure detection time].
MTTR (During tough drive) turns on after the instantaneous power failure is detected.
MBR (Electromagnetic brake interlock) turns off when the alarm occurs.
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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