A communication method for an I/O communication interface module
A technology of communication interface and communication method, applied in the field of I/O communication interface module, can solve the problems of small number of I/O and slow transmission speed, and achieve the effect of reducing switching time, saving quantity, and fast data transmission and communication
Active Publication Date: 2015-11-18
NANJING ESTUN AUTOMATION CO LTD
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Problems solved by technology
[0002] At present, the communication methods of the main CNC systems in China include field bus, RS232, RS485, etc. When using this kind of communication protocol, the program needs to switch between the communication port and the program segment, and the corresponding transmission speed is relatively slow, and in some In some occasions, the communication is also limited by the hardware of the number of communication I / O interfaces. The number of I / O interfaces of the two communication parties may not match. The main reason is that the party receiving data may have a small number of I / Os.
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[0011] Such as figure 1 As shown, the present invention includes an MCU chip, four data input circuits, one data output circuit and one timing control circuit. Both the data input circuit and the data output circuit are photoelectric coupling circuits. The communication data BIT0, BIT1, BIT2 and BIT3 consist of four The data input circuit inputs the MCU chip, and the timing control circuit is connected to the MCU chip. The timing signal REQ controls the timing of the MCU chip. The MCU chip outputs the processed communication signal ACK through the data output circuit.
[0012] Such as figure 2 , Is the working timing diagram of the present invention. The four-channel data input circuit of the present invention is used as a data bus, the data line width is 4bit, and the communication data transmitted is 16 bits. The timing signal REQ and the communication signal ACK are used as the communication handshake signals. On the rising edge, the MCU chip reads the data on the four-way dat...
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The invention discloses an input / output (I / O) communication interface module and a communication method thereof. The I / O communication interface module comprises a microprogrammed control unit (MCU) chip, four data input circuits, one data output circuit and one time sequence control circuit, wherein communication data is input into the MCU chip by the four data input circuits; the time sequence control circuit is connected with the MCU chip; a processed communication signal is output by the MCU chip through the data output circuit; and all the data input circuits, the data output circuit and the time sequence control circuit are photoelectric coupling circuits. The I / O communication interface module can perform efficient and quick data transmission communication under the condition of a limited I / O interface number.
Description
Technical field [0001] The invention belongs to the technical field of circuits and is an I / O communication interface module. Background technique [0002] At present, the communication methods of main domestic CNC systems include fieldbus, RS232, RS485, etc., because when using this type of communication protocol, the program must switch between the communication port and the program segment, the corresponding transmission speed is slow, and in some Occasionally, communication is also limited by the number of communication I / O interfaces. The number of I / O interfaces of the two communication parties may not match. The main reason is that there may be a small number of I / Os on the side of the communication receiving data. Summary of the invention [0003] The problem to be solved by the present invention is that the existing common communication methods are directly carried out through field bus, etc., and the transmission speed is affected when switching with the program segment....
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IPC IPC(8): G06F13/40
Inventor 余继军柳倩希宋华山倪凤贵
Owner NANJING ESTUN AUTOMATION CO LTD