... unit: 0.01HzOverload capacity150% - 1min; 180% - 10s; 200% - 0.5s once per 10 minutesOperational control characteristicsControl ... flexible frequency setting), swing frequency control operation, fixed-length control, counting function, three fault recorded ... fan action control, process PID control, simple PLC control, flexible multi-functional key setting, droop control, parameter identification ...