Song Zhifeng

Design of flexible assembly control systems based on Ethernet

The design of flexibly assembly control systems based on Ethernet is introduced in the paper. First, the whole scheme of the flexible assembly system is presented, then, the designs of the telegram structure and contents and processing functions are expatiated, the general mechanism is focused on for the communication handshake between the super-ordinate system and PLC system by the Ethernet. The design of the whole system is universal, reliable and flexible.

Researching on the rotate worktable control systems base on PLC

The data flow of the rotary worktable with multi work stations is analysis based on the structure of the rotary worktable firstly. And then, the communication protocol based on Siemens PLC among different stations is defined. The realized processes of the general function process about the rotary worktable is described in detail. The application practice indicates that the communication protocol had been not only simplified and unified the communication processes among different stations but also reduced the development cycle and saved the cost of the rotary worktable equipment. This communication protocol among different stations also can be used in other platform.

Design of intelligent CAN communication PCI card based on dual-port ram

This article introduces a kind of Intelligent PCI CAN bus card based on the dual-port RAM(DRAM). First, the whole scheme of the system is presented, then the designs of the hardware and software of Intelligent PCI card Based on CAN bus are expatiated and focused on the structure of DRAM, the general mechanism for the data exchange between the HOST and DEVICE and the communication in I/O and message oriented protocols. the design of whole system is universal, reliability, real-time and expandable.