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, [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. PD07] to [Pr.
PD09]. Failure to do so will cause the servo amplifier to become servo-off when
an instantaneous power failure occurs.
The setting range of [Pr. PF25 SEMI-F47 function - Instantaneous power failure
detection time] differs depending on the software version of the servo amplifier
as follows.
Software version C0 or later: Setting range 30 ms to 200 ms
Software version C1 or earlier: Setting range 30 ms to 500 ms
To comply with SEMI-F47 standard, it is unnecessary to change the initial value
(200 ms).
However, when the instantaneous power failure time exceeds 200 ms, and the
instantaneous power failure voltage is less than 70% of the rated input voltage,
the power may be normally turned off even if a value larger than 200 ms is set in
the parameter.
Summary of Contents for MR-J4-100B(-RJ)
Page 17: ...8 MEMO ...
Page 143: ...4 STARTUP 4 20 MEMO ...
Page 199: ...5 PARAMETERS 5 56 MEMO ...
Page 227: ...6 NORMAL GAIN ADJUSTMENT 6 28 MEMO ...
Page 281: ...8 TROUBLESHOOTING 8 16 MEMO ...
Page 303: ...9 DIMENSIONS 9 22 MEMO ...
Page 319: ...10 CHARACTERISTICS 10 16 MEMO ...
Page 429: ...11 OPTIONS AND PERIPHERAL EQUIPMENT 11 110 MEMO ...
Page 435: ...12 ABSOLUTE POSITION DETECTION SYSTEM 12 6 MEMO ...
Page 483: ...14 USING A LINEAR SERVO MOTOR 14 34 MEMO ...
Page 531: ...16 FULLY CLOSED LOOP SYSTEM 16 26 MEMO ...
Page 613: ...17 APPLICATION OF FUNCTIONS 17 82 MEMO ...
Page 654: ...APPENDIX App 41 ...