Mitsubishi Electric Melservo-J2-SUPER series Instruction Manual page 145

5. PARAMETERS
Class No. Symbol
24 FFC Feed forward gain
Set the feed forward gain. When the setting is 100%, the droop pulses during
operation at constant speed are nearly zero. However, sudden
acceleration/deceleration will increase the overshoot. As a guideline, when the
feed forward gain setting is 100%, set 1s or more as the
acceleration/deceleration time constant up to the rated speed.
25 VCO Override offset
Used to set the offset voltage to analog override.
26 TL0 Torque limit offset
Used to set the offset voltage to analog torque limit (TLA).
27 *ENR
Encoder output pulses
Used to set the encoder pulses (A-phase, B-phase) output by the servo
amplifier.
Set the value 4 times greater than the A-phase or B-phase pulses.
You can use parameter No. 58 to choose the output pulse designation or
output division ratio setting.
The number of A/B-phase pulses actually output is 1/4 times greater than the
preset number of pulses.
The maximum output frequency is 1.3Mpps (after multiplication by 4). Use
this parameter within this range.
For output pulse designation
Set " 0
Set the number of pulses per servo motor revolution.
Output pulse
At the setting of 5600, for example, the actually output A/B-phase pulses are
as indicated below:
A B-phase output pulses
For output division ratio setting
Set " 1
The number of pulses per servo motor revolution is divided by the set value.
Output pulse
At the setting of 8, for example, the actually output A/B-phase pulses are as
indicated below:
A B-phase output pulses
28 TL1 Internal torque limit 1
Used to limit servo motor-torque on the assumption that the maximum torque
is 100%. When 0 is set, torque is not produced.
29 TL2 Internal torque limit 2
Used to limit servo motor-torque on the assumption that the maximum torque
is 100%. When 0 is set, torque is not produced.
Made valid by switching on the internal torque limit selection (TL2).
30 *BKC Backlash compensation
Used to set the backlash compensation made when the command direction is
reversed.
This function compensates for the number of backlash pulses in the opposite
direction to the home position return direction. In the absolute position
detection system, this function compensates for the backlash pulse count in
the direction opposite to the operating direction at power-on.
31 MO1 Analog monitor 1 (MO1) offset
Used to set the offset voltage of the analog monitor 1 (MO1) output.
32 MO2 Analog monitor 2 (MO2) offset
Used to set the offset voltage of the analog monitor 2 (MO2) output.
Name and Function
" (initial value) in parameter No. 58.
set value [pulses/rev]
5600
1400[pulse]
4
" in parameter No. 58.
Resolution per servo motor revolution
Set value
131072 1
8 4
5 - 12
[pulses/rev]
4096[pulse]
Initial Setting
Unit
value range
0 % 0 to 100
0 mV 999 to
999
0 mV 999 to
999
4000 pulse/ 1
rev to
65535
100 % 0 to 100
100 % 0 to 100
0 pulse 0 to 1000
0 mV 999 to
999
0 mV 999 to
999