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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...
A flexibly assembly control system based on data medium Moby-I is designed in this paper. The whole scheme of the flexible assembly system is brought forward firstly. And then, the data structures and the processing functions of the data medium Moby-I are expatiated which are focused on the data exchange of general mechanism between the superordinate system and PLC system. The design of the system...
A programmable automation based on data medium Moby-I is designed in this paper. The whole scheme of the system is brought forward firstly. And then, the data structures of the data medium Moby-I is programmed, the sequence of the multistation assembly control are expatiated, which are focused on the data exchange of general mechanism between PLC system and the Moby. The design of the system is universal,...
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...
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...
The noise simulation circuit of noncoherent spread-spectrum system intermediate frequency (IF) signal simulator is designed based on FPGA and DSP. This circuit generates white Gaussian noise (WGN), calculates coefficients of signal-to-noise ratio (SNR) refer to the specified SNR of each channel and according to these coefficients to generate spread-spectrum IF signal for transmitting to simulate the...
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