The Design Of Interface For Open AC Servo System

With the development of modern control technology and advanced electronic components, PMAC servo system has been widely used in modern industrial manufacture. This paper is based on developing open AC servo system, the design of open interface in AC servo system is studied, it includes the method design,hardware design,software design. The study of this subject is important for the development of open AC servo system.Firstly, the development of AC servo system and programmable logic devices is introduced. Based on analyzing the characteristic of open servo system, the design of the system structure is present. The DSP system is used to control the motor as the central control system, the CPLD system is used to realize some assistant function as the extend system, the interface design of the DSP system and the CPLD system is also present.Secondly, the hardware design and the software design of interface are detailed. According to the functional requirements, DSP system can be divided four parts, including motion interface, HM interface, net interface and the interface between DSP and CPLD. The whole CPLD system is divided five modules, including IO module,control module,frequency-division module,SPI module and alarm module. Those modules are programmed in Verilog and synthesized by ISE. Sometimes, the glitch in the system makes the whole design failed, the cause of glitch is detailed and the optimization of the system is introduced.Finally, the test platform of servo system is designed, and the PC monitor system and the control signal generator based on PLC are introduced in detail. The analyses of the results are revealed in the end of the paper and they indicate that the design is reliable.