A PLC-based controllable data flow multi-point data acquisition device and method
A data acquisition and data flow technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems of uncontrollable data flow, lack of flexibility, etc., to achieve controllable data flow, high flexibility, satisfying Effects of data collection requirements
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[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0029] Such as Figure 1-2 As shown, a kind of PLC-based controllable data flow multi-point data acquisition device of the present invention includes: an industrial computer and several PLCs, and the PLC is connected with a digital input module, an analog input module, a counter module, and a pulse generator module, RS232 module, RS485 module. Number each PLC, and the number is unique, open up a thread pool for each PLC in the industrial computer to handle the data communication of different PLCs, and record these numbers in the industrial computer as a sign to distinguish different PLCs. Each PLC recognizes its own number and the numbers of other PLCs, and the number is resolved into an IP address inside the PLC during communication. Each PLC opens two different ports, one as a data sending port and one as a data receiving port. Each PLC h...
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