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7. SPECIAL ADJUSTMENT FUNCTIONS
(2) When an undervoltage occurs during the instantaneous main circuit power failure
An undervoltage alarm (10.2) is generated if the bus
voltage reduces at the undervoltage level or lower.
Main circuit
power supply
Bus voltage
Undervoltage
level (158VDC)
Trouble (ALM)
During tough
drive (MTTR)
Electromagnetic
brake interlock
(MBR)
Base circuit
ON
OFF
Instantaneous power failure time
of the main circuit power supply
Ready (RD)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Parameter No. PC28
(3) When the instantaneous main circuit power failure time is longer than the set value of parameter No. PC28
(detailed setting of instantaneous power failure tough drive)
If the instantaneous main circuit power failure time exceeds the set value of parameter No. PC28, main
circuit power supply failure (instantaneous power failure) alarm (10.3) occurs even if the instantaneous
power failure tough drive function is valid.