Mitsubishi Electric MR-J4W2 Instruction Manual page 420

17. APPLICATION OF FUNCTIONS
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 158 V DC within the instantaneous power failure
time of the control circuit power supply
[AL. 10 Undervoltage] occurs when the bus voltage decrease lower than 158 V DC regardless
of the enabled instantaneous power failure tough drive.
Control circuit
power supply
Bus voltage
Undervoltage level
(158 V DC)
CALM
(AND malfunction)
WNG
(Warning)
MTTR
(During tough drive)
MBR
(Electromagnetic
brake interlock)
Base circuit
Instantaneous power failure time of the control circuit power supply
ON
OFF
[Pr. PX28]
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
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