Mitsubishi Electric MELSERVO-J5 Series User Manual page 159

■When the instantaneous power failure time of the control circuit power supply < [Pr. PF25
SEMI-F47 function - Instantaneous power failure detection time (instantaneous power failure
tough drive - Detection time)]
The operation status differs depending on how much the bus voltage decreases.
• When the bus voltage does not decrease to the undervoltage level or lower within the instantaneous power failure time of
the control circuit power supply, the operation continues as is without setting off the alarm.
ON
Control circuit
OFF
power supply
Bus voltage
*1
Undervoltage level
ON
ALM
(Malfunction)
OFF
ON
WNG
(Warning)
OFF
ON
MTTR
(During tough drive)
OFF
MBR
ON
(Electromagnetic
OFF
brake interlock)
ON
Base circuit
OFF
*1 For the undervoltage level, refer to the following table.
Page 159 Behavior
Instantaneous power failure time of control circuit power supply
[Pr. PF25]
4 APPLICABLE FUNCTIONS
4.1 Tough drive function
4
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