8-11
8-2 Gain Parameters
Accurax G5 AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
8
Parameters Details
Default settings:
(1) Pn101 = 180 - For 200V drives of 1Kw or upper and 400V drives
(2) Pn101 = 270 - For 200V drives of less than 1 Kw
Determine speed loop responsiveness.
The setting for the speed loop gain must be increased to increase the position loop gain and
improve the responsiveness of the entire servo system. Setting too high, however, may result in
vibration.
The setting unit for Pn101 will be Hz if the Inertia Ratio (Pn004) is set correctly.
When the speed loop gain is changed, the response is as shown in the following diagram.
Default settings:
(1) Pn102 = 310 - For 200V drives of 1Kw or upper and 400V drives
(2) Pn102 = 210 - For 200V drives of less than 1 Kw
Set the speed loop integration time constant.
The smaller the set value, the faster the error will come close to 0 when stopping. Set to 9,999 to
maintain integration. Set to 10,000 to invalidate the effect of integration.
When the speed loop integral time constant is changed, the response is as shown in the
following diagram.
Pn101
Speed Loop Gain
Setting
range
1 to 32,767 Unit 0.1 Hz
Default
setting
See
Note
below
Power OFF
and ON
−
All
Motor speed
Time
Overshooting occurs if the speed loop gain is high.
(Vibration occurs if the gain is too high.)
Speed loop gain is low.
Pn102
Speed Loop Integral Time Constant
Setting
range
1 to 10,000 Unit 0.1 ms
Default
setting
See
Note
below
Power OFF
and ON
−
All
Motor speed
Time
Overshooting occurs if the speed loop integral
time constant is small.
Speed loop integral
time constant is large.
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