Maxsine EP3 AC Series, User Manual

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Chapter 4 Running
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4.8.2 Action of gain switching
Action conditions for gain switching are:
P208 P209 Condition of gain switching
0 Unacted Fixed first gain group
1 Unacted Fixed second gain group.
2 Unacted Input GAIN terminal for gain switching from DI. 'OFF' is the
first gain group; 'ON' is the second gain group.
3 Frequency(×0.1kp
ps)
If the input frequency of command pulse surpasses P209, then
switches to second gain group.
4 Position(pulse) If position pulse deviation surpasses P209, then switches to
second gain group.
5 Speed(r/min) If the servomotor speed of surpasses P209, then switches to
second gain group.
The following chart shows: make a switching to the second gain group when the switching
condition is satisfied. After that, if the switching condition is not satisfied, make a switching to
the first gain group. The switching condition must maintain a period set by parameter P211 and
then can make switching to avoid mistake by receiving disturbance. During switching, the
current gain group will make linearity change to the goal gain group according to the setting time
by parameter P212. Each parameter of the gain group will all make change at the same time to
avoid the machinery impact caused by the parameter changing suddenly. In order to prevent the
switching happens frequently, the comparator has a hysteretic error set by Parameter P210.
In the speed control, PI and P control modes can make switching between them. Set the
second integral time constant (P011) with maximum value (1000.0) in the second gain group. It is
equal in canceling the integral item. Other parameters in the second gain group are the same as the