Chapter 6. Parameter Setting
6-14
Menu Menu name Unit Display range Initial value Mode
P2-03 SC LOOP Gain rad/sec 0 ~ 5000 By capacity SPT
(Description continued)
If the ratio of the overall system inertia (Sum of motor inertia and load inertia) to the motor
inertia is set in [Inertia Ratio (P2-22)], or if the value set by using the autotuning [Autotuning
(P2-24)] provided with the servo is the same as the following, the recommended set values
of [SC Loop Gain (P2-03)] by servo capacity are as follows.
[Table]
Servo driver capacity FDA5001~04 FDA5005~5075
Inertia Ratio (P2-22) set
value
Recommended SC Loop
Gain (P2-03) set value
Recommended SC Loop
Gain (P2-03) set value
1.0 500 ~ 1000 100 ~ 200
2.0 350 ~ 500 70 ~ 200
3.0 300 ~ 500 50 ~ 150
5.0 200 ~ 300 40 ~ 100
10.0 150 ~ 250 30 ~ 80
20.0 100 ~ 150 20 ~ 60
30.0 60 ~ 100 -
(Caution !!) However, the recommended SC Loop Gain (P2-03) set values may be deviated
according to the status of the load.
If the □80 or □130 motor is controlled by servo FDA-5004, use SC Loop Gain
(P2-03) of FDA-5005.
Menu Menu name Unit Display range Initial value Mode
P2-04 SC I TC [ms] ms 1 ~ 10000 20 SPT
Reducing the speed integrating time constant can improve the transient response
characteristics of speed control and normal status characteristics. However, if the time
constant is reduced excessively, overshoot may occur. Select appropriate value. If 10,000 is
input, the speed integrating time constant is considered indefinite, and the speed control
turns to P control form.
Recommended set value =
10000
[SC LOOP Gain (P2- 03)]
[ms]
Recommended minimum set value =
3000
[SC LOOP Gain (P2- 03)]
[ms]
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