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4.1
Tough drive function
Tough drive function is a function that allows the operation to continue without stopping the device, even when an alarm would
occur normally. This function also features the vibration tough drive and the instantaneous power failure tough drive.
Vibration tough drive
Vibration tough drive function is a function to: 1) prevent vibration, as the mechanical resonance frequency changes due to
aging of the machine; and 2) instantaneously reset the filter when machine resonance occurs. For details, refer to "Vibration
tough drive" in the following manual.
MR-JET User's Manual (Adjustment)
Instantaneous power failure tough drive
The instantaneous power failure tough drive function avoids the occurrence of [AL. 010 Undervoltage], even when an
instantaneous power failure occurs during operation. Operating continuously without stopping the system is feasible. 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. 010
Undervoltage] simultaneously. The [AL. 010.1 Voltage drop in the control circuit power] detection time for the power supply
can be changed by [Pr. PF25 Instantaneous power failure tough drive detection time]. In addition, [AL. 010.2 Voltage drop in
the main circuit power] detection level for the bus voltage is changed automatically.
Precautions
• MBR (Electromagnetic brake interlock) is on during the instantaneous power failure tough drive.
• When the load of instantaneous power failure is large, [AL. 010.2] caused by the bus voltage drop may occur regardless of
the set value of [Pr. PF25 Instantaneous power failure tough drive detection time].
Setting method
Set [Pr. PA20.2 Instantaneous power failure tough drive selection] to "1" (enabled).
To set the time until the occurrence of [AL. 010.1 Voltage drop in the control circuit power], use [Pr. PF25 Instantaneous power
failure tough drive detection time].
To extend the time until the occurrence of [AL. 010.2 Voltage drop in the main circuit power], set [Pr. PA26.0 Torque limit
function selection at instantaneous power failure] to "1" (enabled).
Servo
Symbol
Name
parameter
PA20.2
*TDS
Instantaneous power failure tough
drive selection
PA26.0
*AOP5
Torque limit function selection at
instantaneous power failure
PF25
CVAT
Instantaneous power failure tough
drive - Detection time
Outline
Enable or disable the instantaneous power failure tough drive.
0: Disabled (initial value)
1: Enabled
Enable or disable the torque limit function at instantaneous power failure.
0: Disabled (initial value)
1: Enabled
Set the time until the occurrence of [AL. 010.1 Voltage drop in the control circuit power].
Initial setting: 200 [ms]
4 APPLICABLE FUNCTIONS
4.1 Tough drive function
4
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