Fuzzy control and PID auto-tuning function perfectly combined. High accuracy control, Stability and quality guaranteed . Auto-diagnostic function provided with malfunction code displayed . RS485 communication function supported optionally . General format input, allowable to select 56 different kinds of input. Quite lots of different kinds of output , can meet many control demands of the load. Output power can be controlled manually with Manual/ automatic shift function without disturbing EEPROM memorizer, data can be kept more than ten years