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Alternative TitleReading and configuration method and device of serial communication data of PLC (programmable logic controller)
孙凯; 李智刚; 秦宝成
Rights Holder中国科学院沈阳自动化研究所
Patent Agent沈阳科苑专利商标代理有限公司 21002
Other Abstract

The invention relates to a reading and configuration method and device of serial communication data of a PLC (programmable logic controller). The method comprises the following steps: the RTS (Request To Send) and CTS (Clear To Send) of a RS232 serial port module are in short connection the TxD and RxD of a RS485 serial port module are in short connection -TxD and -RxD of the RS485 serial port module are in short connection the data exchange of the PLC and serial communication equipment is periodically and continuously triggered by a double-timer coupling method so that the PLC is continuously communicated with the serial communication equipment serial data is compiled and stored in the internal output variable region of the PLC, and configured and read in a CanOpen master station and after a group of data is read each time, the index and data of the serial data buffer region of the PLC are completely reset and the data is started to read from the index zero of the buffer region each time. By using the reading and configuration method and device of the serial communication data of the PLC, the hardware connection problem of non-handshake waiting signal type serial communication equipment widely used in the current market is solved, thus ensuring the real time of communication.

PCT Attributes
Application Date2010-12-04
Date Available2013-08-28
Application NumberCN201010573914.9
Open (Notice) NumberCN102486639B
Contribution Rank1
Document Type专利
Recommended Citation
GB/T 7714
孙凯,李智刚,秦宝成. PLC逻辑控制器串行通讯数据的读取、配置方法及装置[P]. 2012-06-06.
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