... modulationFrequency precisionDigital Setting: max frequency×±0. 01%Analog Setting: max frequency×±0.2%Frequency resolutionDigital Setting:0.01HzAnalog Setting ... trip caused by over-currentFix-length controlThe frequency inverter will stop when reaching the fixed ... relay output signal ,1 channelDigital panelLED Displayindicate parameters: frequency ,output voltage, output current and so on.connected ...