Delta ASD-B2-0121-B, User Manual

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Chapter 6 Control Modes of Operation
Revision June 2010
6-19
Explanation of manual mode:
1. When P2-32 is set to mode#0, the setting value of P2-00, P2-02, P2-04, P2-06,
P2-07, P2-25 and P2-26 can be user-defined. When switching mode #1 or #2 to
#0, the setting value of P2-00, P2-02, P2-04, P2-06, P2-07, P2-25 and P2-26 will
change to the value that measured in #1 auto-tuning mode or #2 semi-auto
tuning mode.
Explanation of auto-tuning mode:
The servo drive will continuously estimate the system inertia, save the measured
load inertia value automatically and memorized in P1-37 every 30 minutes by
referring to the frequency response settings of P2-31.
1. When switching mode #1 or #2 to #0, the servo drive will continuously estimate
the system inertia, save the measured load inertia value automatically and
memorized in P1-37. Then, set the corresponding parameters according to this
measured load inertia value.
2. When switching mode#0 or #1 to #2, enter the appropriate load inertia value in
P1-37.
3. When switching mode#1 to #0, the setting value of P2-00, P2-04 and P2-06 will
change to the value that measured in #1 auto-tuning mode.
Explanation of semi-auto tuning mode:
1. After the system inertia becomes stable (The display of P2-33 will show 1), it
will stop estimating the system inertia, save the measured load inertia value
automatically, and memorized in P1-37. However, when P2-32 is set to mode#1
or #2, the servo drive will continuously perform the adjustment for a period of
time.
2. When the value of the system inertia becomes over high, the display of P2-33
will show 0 and the servo drive will start to adjust the load inertia value
continuously.
Manual Mode
When Tuning Mode Settings of P2-32 is set to 0, the users can define the proportional
speed loop gain (P2-04), speed integral gain (P2-06) feed forward gain (P2-07) and ratio of
load inertia to servo motor Inertia (1-37). Please refer to the following description:
„
Proportional gain: Adjust this gain can increase the position loop responsiveness.
„
Integral gain: Adjust this gain can enhance the low-frequency stiffness of speed
loop and eliminate the steady error. Also, reduce the value of phase margin. Over
high integral gain will result in the unstable servo system.
„
Feed forward gain: Adjust this gain can decrease the phase delay error