7. SPECIAL ADJUSTMENT FUNCTIONS
7 - 26
7.3.2 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 tolerance against instantaneous power failure 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. PF25 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 selecting "Enabled (_ _ _ 1)" for "Torque limit function selection at
instantaneous power failure" in [Pr. PA26], if an instantaneous power failure
occurs during operation, you can save electric energy charged in the capacitor
in the servo amplifier by limiting torque at acceleration. You can also delay the
time until the occurrence of [AL. 10.2 Voltage drop in the main circuit power].
Doing this will enable you to set a longer time in [Pr. PF25 SEMI-F47 function -
Instantaneous power failure detection time].
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. PF25 SEMI-F47 function - Instantaneous power failure detection
time].
The external dynamic brake cannot be used for compliance with SEMI-F47
standard. Do not assign DB (Dynamic brake interlock) in [Pr. PD23] to [Pr.
PD26], [Pr. PD28], and [Pr. PD47]. Failure to do so will cause the servo amplifier
to become servo-off when an instantaneous power failure occurs.
The MR-J4-03A6 servo amplifier is not compatible with instantaneous power
failure tough drive.
Summary of Contents for MR-J4
Page 9: ...A 8 MEMO ...
Page 19: ...10 MEMO ...
Page 73: ...1 FUNCTIONS AND CONFIGURATION 1 54 MEMO ...
Page 155: ...3 SIGNALS AND WIRING 3 76 MEMO ...
Page 199: ...4 STARTUP 4 44 MEMO ...
Page 289: ...6 NORMAL GAIN ADJUSTMENT 6 24 MEMO ...
Page 335: ...8 TROUBLESHOOTING 8 8 MEMO ...
Page 357: ...9 OUTLINE DRAWINGS 9 22 MEMO ...
Page 517: ...12 ABSOLUTE POSITION DETECTION SYSTEM 12 30 MEMO ...
Page 617: ...16 USING A DIRECT DRIVE MOTOR 16 20 MEMO ...
Page 641: ...17 FULLY CLOSED LOOP SYSTEM 17 24 MEMO ...
Page 725: ...18 MR J4 03A6 SERVO AMPLIFIER 18 84 MEMO ...
Page 763: ...APPENDIX App 38 ...
Page 789: ...MEMO ...
Page 793: ......