Mitsubishi Electric MELSERVO-J4 MR-J4 A Series - Page 160

5. PARAMETERS
5 - 17

Control
mode
No./symbol/name
Setting
digit
Function
Initial
value
[unit]
PST
_ _ _ x Vibration suppression control 1 tuning mode selection
Select the tuning mode of the vibration suppression control 1. Refer to section
7.1.5 for details.
0: Disabled
1: Automatic setting
2: Manual setting
0h
PB02
VRFT
Vibration
suppression
control tuning
mode
(advanced
vibration
suppression
control II)
_ _ x _ Vibration suppression control 2 tuning mode selection
Select the tuning mode of the vibration suppression control 2. To enable the digit,
select "3 inertia mode (_ _ _ 1)" of "Vibration suppression mode selection" in [Pr.
PA24]. Refer to section 7.1.5 for details.
0: Disabled
1: Automatic setting
2: Manual setting
0h
_ x _ _ For manufacturer setting 0h
x _ _ _ 0h
PB03
PST
Position
command
acceleration/de
celeration time
constant
(position
smoothing)
This is used to set the constant of a primary delay to the position command.
You can select a control method from "Primary delay" or "Linear
acceleration/deceleration" in [Pr. PB25 Function selection B-1]. The setting range
of "Linear acceleration/deceleration" is 0 ms to 10 ms. Setting of longer than 10
ms will be recognized as 10 ms.
When the linear acceleration/deceleration is selected, do not change the "Control
mode selection" ([Pr. PA01]). Doing so will cause the servo motor to make a
sudden stop at the time of position control mode switching or restart.
(Example) When a command is given from a synchronizing encoder, synchronous
operation will start smoothly even if it start during line operation.
หᦼ↪
ࠛࡦࠦ࡯࠳
ᆎേ
ࠨ࡯ࡏࡕ࡯࠲
ࠨ࡯ࡏࠕࡦࡊ
ON
OFF
ᤨቯᢙ⸳ቯ᦭
ᤨቯᢙ⸳ቯߥߒ
ࠨ࡯ࡏࡕ࡯࠲
࿁ォㅦᐲ
ᆎേ
t
Setting range: 0 to 65535
0
[ms]
PB04
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 1 s or
more as the acceleration time constant up to the rated speed.
Setting range: 0 to 100
0
[%]
encoder
Synchronizing
Servo motor
Servo amplifier
Start
Without time constant setting
Servo motor
speed
Start
Without time
constant setting