Servo Adjustment Parameters - Mitsubishi Electric MELSEC-Q QD75M User Manual

5 DATA USED FOR POSITIONING CONTROL

5.2.8 Servo adjustment parameters

Item
Pr.112 Load inertia ratio
Pr.113
Position loop gain 1
Pr.114 Speed loop gain 1
Pr.115 Position loop gain 2
Pr.116
Speed loop gain 2
Pr.117 Speed integral compensation
Setting details
Used to set the ratio of the load inertia to the inertia
moment of the servomotor.
When auto tuning is selected, the result of auto tuning
is automatically used.
POINT
Pr.112 Load inertia ratio to Pr.117 Speed integral
compensation is transferred to servo amplifier in PLC
CPU power on, reset and PLC READY signal (Y0)
on. When auto tuning is executed, it is changed to the
optimum value inside servo amplifier.
The result of auto tuning is transferred to QD75 at this
time.
When auto tuning is invalid and wants to keep gain
adjustment result by "GX Configurator-QP", a reading
stock is executed by Cd.102 Servo amplifier read to
QD75.
After that, execute Cd.1 Flash ROM write request,
and keep it in the flash ROM.
Used to set the gain of position loop 1. Increase the
gain to improve trackability performance in response
to the position command.
Normally this parameter setting need not be
changed. Higher setting increases the response
level but is liable to generate vibration and/or noise.
Used to set the gain of the position loop.
Set this parameter to increase position response to
load disturbance.
Higher setting increases the response level but is
liable to generate vibration and/or noise.
Set this parameter when vibration occurs on
machines of lowrigidity or large backlash.
Higher setting increases the response level but is
liable to generate vibration and/or noise.
Used to set the constant of integral compensation.
5 - 64
MELSEC-Q
Setting value 1
0 to 100.0[times]
0 to 300.0[times]
4 to 1000[rad/s]
4 to 2000[rad/s]
20 to 5000[rad/s]
20 to 8000[rad/s]
1 to 500[rad/s]
1 to 1000[rad/s]
20 to 8000[rad/s]
20 to 20000[rad/s]
1 to 1000[ms]