Useful program and design for popular programmable logical controller 并列题名：Useful program and design for popular programmable logical controller Principle and experiment of the programmable logical controller Application technology of programmable logical controller 并列题名：Application technology of programmable logical controller Technique and application of programmable logic controller Electrical control and programmable logic controller The Technology and Application of Programmable Logic Controller The concise course of programmable logic controller Principle and developing of mitsubishi programmable logic controller