17. APPLICATION OF FUNCTIONS
17 - 48
(b) Instantaneous power failure tough drive function
The instantaneous power failure tough drive function avoids [AL. 10 Undervoltage] even when an
instantaneous power failure occurs during operation. When the instantaneous power failure tough
drive activates, the function will increase the immunity to instantaneous power failures using the
electrical energy charged in the capacitor in the servo amplifier and will change an alarm level of
[AL. 10 Undervoltage] simultaneously. The [AL. 10.1 Voltage drop in the control circuit power]
detection time for the control circuit power supply can be changed by [Pr. PX28 SEMI-F47 function -
Instantaneous power failure detection time]. In addition, [AL.10.2 Voltage drop in the main circuit
power] detection level for the bus voltage is changed automatically.
POINT
MBR (Electromagnetic brake interlock) will not turn off during the instantaneous
power failure tough drive.
When the load of instantaneous power failure is large, the undervoltage alarm
([AL. 10.2]) caused by the bus voltage drop may occur regardless of the set
value of [Pr. PX28 SEMI-F47 function - Instantaneous power failure detection
time].
The MR-J4W2-0303B6 servo amplifier is not compatible with instantaneous
power failure tough drive.
1) Instantaneous power failure time of control circuit power supply > [Pr. PX28 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. PX28 SEMI-F47 function - Instantaneous power failure detection time].
MTTR (During tough drive) turns on after the instantaneous power failure is detected.
MBR (Electromagnetic brake interlock) turns off when the alarm occurs.
Control circuit
power supply
Bus voltage
Undervoltage level
(158 V DC)
CALM
(AND malfunction)
[Pr. PX28]
Instantaneous power failure time of the control circuit power supply
MTTR
(During tough drive)
MBR
(Electromagnetic
brake interlock)
Base circuit
ON
OFF
ON
OFF
ON
OFF
WNG
(Warning)
ON
OFF
ON
OFF
ON
OFF
Summary of Contents for MR-J4W2
Page 9: ...A 8 MEMO ...
Page 17: ...8 MEMO ...
Page 31: ...1 FUNCTIONS AND CONFIGURATION 1 14 MEMO ...
Page 95: ...4 STARTUP 4 20 MEMO ...
Page 169: ...6 NORMAL GAIN ADJUSTMENT 6 20 MEMO ...
Page 201: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 32 MEMO ...
Page 213: ...8 TROUBLESHOOTING 8 12 MEMO ...
Page 219: ...9 OUTLINE DRAWINGS 9 6 MEMO ...
Page 229: ...10 CHARACTERISTICS 10 10 MEMO ...
Page 295: ...13 USING STO FUNCTION 13 14 MEMO ...
Page 327: ...14 USING A LINEAR SERVO MOTOR 14 32 MEMO ...
Page 371: ...16 FULLY CLOSED LOOP SYSTEM 16 24 MEMO ...
Page 521: ...APPENDIX App 38 ...
Page 537: ...MEMO ...
Page 541: ......