Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 201

7. SPECIAL ADJUSTMENT FUNCTIONS
However, the overload tough drive function is not effective in the following cases.
(1) When the effective load ratio temporarily exceeds 200%.
(2) When the load increases at a stop such as a detent torque of a vertical lift.
Servo motor
speed
ON
In-position (INP)
OFF
ON
During tough
drive (MTTR)
OFF
ON
Warning (WNG)
OFF
ON
Trouble (ALM)
OFF
When the overload tough drive activates, the number of tough drive in the display mode (alarm mode) is
increased by one. (Refer to section 5.5.)
7.1.2 Vibration tough drive function
The vibration tough drive function resets the filter instantaneously and prevents vibration when a machine
resonance is generated due to aging distortion or individual differences.
In order to reset the machine resonance suppression filter by the vibration tough drive function, parameters No.
PB13 (machine resonance suppression filter 1) and No. PB15 (machine resonance suppression filter 2) are
required to be set in advance.
Perform either of the following to set parameters No. PB13 and No. PB15.
(1) Perform the one-touch tuning (refer to section 6.1).
(2) Set the parameters manually (refer to section 4.2.2).
Load fluctuation
occurs
Effective
load ratio
Load ratio
increase
Overload tough drive start
Overload alarm level
Ti Ti
Executes the optimum adjustment of the stop time
(INP delay time) Ti properly and avoids the overload1
alarm (50.1) during the overload tough drive.
7 - 2
Load fluctuation
normal status
Continuing
to drive
Ti
When the load ratio reduces,
automatically ends the INP
delay.