还有用变频器能修正编码器零点吗？用P115=8，请问具体怎么操作的。MasterDrives MC说明书上是这么说的，P1158=Position test for synchronous motors
In this status after power up, a stator current is
impressed with U(-), V and W(+), the absolute value
of which is input via Isq (P270, P271).
If the motor is free to move slightly, a misorientation
of the motor encoder can be read on r286 (also see P549)
但具体我不会操作，是要调节P270和P271参数吗？