SMC Networks LECSN-T Series - Page 255

7. SPECIAL ADJUSTMENT FUNCTIONS
7 - 26
(1) Instantaneous power failure time of the control circuit power supply > [Pr. PF25 SEMI-F47 function -
Instantaneous power failure detection time]
The alarm occurs when the instantaneous power failure time of the control circuit power supply exceeds
[Pr. PF25 SEMI-F47 function - Instantaneous power failure detection time].
MTTR (During tough drive) turns on after detecting the instantaneous power failure.
MBR (Electromagnetic brake interlock) turns off when the alarm occurs.
Control circuit
pow er supply
Bus voltage
Undervoltage level
(Note)
ALM
(Malfunction)
[Pr. PF25]
Instantaneous power failure time of the control circuit power supply
MTTR
(During tough drive)
MBR
(Electromagnetic
brake interlock)
Base circuit
ON
OFF
ON (energization)
OFF (power failure)
ON
OFF
WNG
(Warning)
ON
OFF
ON
OFF
ON
OFF
Note.
Refer to table 7.1 for the undervoltage level.