... sheet roll forming machinecorrugated roof sheet machine 1,PLC 2,Customized 3,StableI Main Specification:i. ... Control System by PLC, Touchable Screen,Frequency Convertor, Encoder, etc.(2) PLC Mitsubishi, Japan(3) Touchable Screen Mitsubishi, Japan, 5. ... 7"(4) Electric elements Schneider, Japan(5) Frequency Converter Mitsubishi, Japan ...