Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 154

■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.
Control circuit
power supply
Bus voltage
*1
Undervoltage level
ALM
(Malfunction)
WNG
(Warning)
MTTR
(During tough drive)
MBR
(Electromagnetic
brake interlock)
Base circuit
*1 For the undervoltage level, refer to the following table.
Page 154 Behavior
4 APPLICABLE FUNCTIONS
152
4.1 Tough drive function
Instantaneous power failure time of control circuit power supply
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
[Pr. PF25]