The PWE's (power cabinet equipment) design features of Qinshan phase II and Dayawang nuclear power plants are referenced in the design of the RGL(rod control system and rod position system) PWEs for the Units 3 & 4 of Hongyanhe nuclear power plant. A "one for four" scheme, which means one group of BCP(power rack) controlling four CRDMs (control rod drive mechanism), is adopted. This paper describes the RGL system and introduces the main functions, principle and hardware design of the RGL PWE cabinet, and adopts NI virtual instrument...