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7. SPECIAL ADJUSTMENT FUNCTIONS
7 - 25
(2) Instantaneous power failure time < [Pr. PF25 Instantaneous power failure tough drive - Detection time]
Operation status differs depending on how bus voltage decreases.
(a) When the bus voltage decreases to 200 V DC or lower within the instantaneous power failure time
[AL. 10 Undervoltage] occurs when the bus voltage decreases to the undervoltage level or lower
regardless of the enabled instantaneous power failure tough drive.
Power supply
Bus voltage
Undervoltage level
(200 V DC)
A
LM
(Malfunction)
[Pr. PF25]
Instantaneous power failure time
MTTR
(During tough drive)
MBR
(Electromagnetic
brake interlock)
Base circuit
ON
OFF
ON
OFF
ON
OFF
WNG
(Warning)
ON
OFF
ON
OFF
ON
OFF
(b) When the bus voltage does not decrease to 200 V DC or lower within the instantaneous power
failure time
The operation continues without alarming.
Power supply
Bus voltage
Undervoltage level
(200 V DC)
A
LM
(Malfunction)
[Pr. PF25]
Instantaneous power failure time
MTTR
(During tough drive)
MBR
(Electromagnetic
brake interlock)
Base circuit
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
WNG
(Warning)
ON
OFF