Lite-On Technology Corp.
Industrial Automation
170
1: Description for Auto Mode
The system inertia is estimated continuously. The load inertia ratio estimated is stored
automatically to PB-35 every 30 minutes. Refer to the rigidity and bandwidth setting of
PB-32.
When switching from Auto Mode 1 or Semi-auto Mode 2 to Manual Mode 0, the system
stores the measured load inertia ratio automatically to PB-35 and sets corresponding
control parameter based on the load inertia ratio.
When switching from Manual Mode 0 directly to Semi-auto Mode 1 or Auto Mode 2, enter
the proper load inertia ratio in PB-35.
When switching from Auto Mode 1 to Manual Mode 0, the values of PB-20, PB-24 and
PB-26 are altered to the corresponding parameter value in Auto Mode.
When switching from Semi-Auto Mode 2 to Manual Mode 0, the values of PB-20, PB-24,
PB-26, PB-17 and PB-28 are altered to the corresponding parameter value in Semi-auto
Mode.
2: Description for Semi-auto Mode
When the system inertia is stabilized, the estimation stops after PB-50 shows 1. The load
inertia ratio estimated is stored in PB-35. The adjustment continues when switching from
other modes (Manual or Auto Mode) to Semi-auto Mode.
If the range of system inertia is too large, PB-50 shows 0 and the adjustment continues.
Manual mode
When PB-33 is set to 0, the proportional gain (PB-24), integral gain (PB-26) and feed-forward gain
(PB-27) are set by the user. The impacts caused by each parameter in general are as follows:
Proportional gain (PB-24): The gain increase would expand the response bandwidth of the position
circuit.
Feed-forward gain (PB-27): This reduces the phase-lag error.
Integral gain (PB-26): The gain increase would enhance the low-frequency rigidity of the speed-loop
and reduce the steady-state error. In the meantime, the phase margin value is sacrificed. Excessive
integral gain may result in system instability.
Relevant parameters:
Proportional gain for speed control
Communication
address:
0130H
0131H
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