常用设定:21 CO: Act. frequency (scaled to P2000) – 频率实际值(按 P2000定标的)24 CO: Act. output frequency (scaled to P2000) – 输出频率实际值(按 P2000定标的)25 CO: Act. output voltage (scaled to P2001) – 输出电压实际值(按 P2001定标的)26 CO: Act. filtered DC-link voltage (scaled to P2001) – 直流中间回路电压已滤波的实际值(按 P2001定标的)27 CO: Act. output current (scaled to P2002) – 输出电流实际值(按 P2002定标的)