1. FUNCTIONS AND CONFIGURATION 
1 -  6 
 
1.5 Function list 
The following table lists the functions of this servo. For details of the functions, refer to each section 
indicated in the detailed explanation field. 
 
Function Description 
Detailed 
explanation 
Model adaptive control 
This function realizes a high response and stable control following the ideal model.  
The two-degrees-of-freedom model adaptive control enables you to set a response to 
the command and response to the disturbance separately. 
Additionally, this function can be disabled. Refer to section 7.4 to disable this function. 
 
Position control mode  This servo amplifier is used as a position control servo.   
Speed control mode  This servo amplifier is used as a speed control servo.   
Torque control mode  This servo amplifier is used as a torque control servo.   
High-resolution encoder 
A high-resolution encoder of 131072 pulses/rev is used as the encoder of the rotary 
servo motor compatible with the MELSERVO-JE series. 
 
Absolute position detection 
system 
Setting a home position once makes home position return unnecessary at every 
power-on. 
Chapter 12 
Gain switching function 
You can switch gains during rotation and during stop, and can use input devices to 
switch gains during operation. 
Section 7.2 
Advanced vibration 
suppression control II 
This function suppresses vibration at the arm end or residual vibration.  Section 7.1.5 
Machine resonance 
suppression filter 
This filter function (notch filter) decreases the gain of the specific frequency to 
suppress the resonance of the mechanical system. 
Section 7.1.1 
Shaft resonance suppression 
filter 
When a load is mounted to the servo motor shaft, resonance by shaft torsion during 
driving may generate a mechanical vibration at high frequency. The shaft resonance 
suppression filter suppresses the vibration. 
Section 7.1.3 
Adaptive filter II 
The servo amplifier detects mechanical resonance and sets filter characteristics 
automatically to suppress mechanical vibration. 
Section 7.1.2 
Low-pass filter 
This function suppresses high-frequency resonance which occurs as servo system 
response is increased. 
Section 7.1.4 
Machine analyzer function 
This function analyzes the frequency characteristic of the mechanical system by 
simply connecting an MR Configurator2 installed personal computer and servo 
amplifier. 
MR Configurator2 is necessary for this function. 
 
Robust filter 
This function enhances the disturbance response when the response level remains 
low because the load to motor inertia ratio of axes, such as a roll feed axis, is high. 
[Pr. PE41] 
Slight vibration suppression 
control 
This function suppresses vibration of ±1 pulse generated at a servo motor stop.  [Pr. PB24] 
Auto tuning 
This function automatically adjusts the gain to an optimum value if load applied to the 
servo motor shaft varies. 
Section 6.3 
Regenerative option 
Used when the built-in regenerative resistor of the servo amplifier does not have 
sufficient regenerative capability for the regenerative power generated. 
Section 11.2 
Alarm history clear  This function clears the alarm history.  [Pr. PC21] 
Output signal selection 
(device settings) 
The output devices including MBR (Electromagnetic brake interlock) and ALM 
(Malfunction) can be assigned to certain pins of the CN3 connector. 
[Pr. PD07] 
Output signal (DO) forced 
output 
Output signal can be forced on/off independently of the servo status. 
Use this function for checking output signal wiring, etc. 
Section 4.5.1 
(1) (d) 
Test operation mode 
Jog operation, positioning operation, motor-less operation, DO forced output, and 
program operation 
MR Configurator2 is necessary for this function. 
Section 4.5 
MR Configurator2 
Using a personal computer, you can perform the parameter setting, test operation, 
monitoring, and others. 
Section 11.4 
One-touch tuning 
Gain adjustment is performed just by one click on a certain button on MR 
Configurator2. 
MR Configurator2 is necessary for this function. 
Section 6.2 
Tough drive function 
This function makes the equipment continue operating even under the condition that 
an alarm occurs. 
The tough drive function includes two types: the vibration tough drive and the 
instantaneous power failure tough drive. 
Section 7.3