UFC760BE43 3BHE004573R0043 | ABB | Using the same data transmission format

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UFC760BE43 3BHE004573R0043 | ABB | Using the same data transmission format

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To achieve communication between UFC760BE43 and PCs, it is necessary to use the same data transmission format for microcontrollers. The communication protocol is as follows: baud rate is 9600bps, with 8 data bits, 1 stop bit, 1 start bit, and no parity check bit. The PC sends commands to the microcontroller, and “0” represents the received data identification code; “1” represents sending high-frequency high-level identification codes; “2” represents the high-frequency low-level identification code; “3” represents the low-frequency high-level identification code; “4” represents a low-frequency low-level identification code.

The communication UFC760BE43 in the PC Windows environment is written using Visual Basic 6.0. Utilize its ActiveX control, namely the MSComm control (Microsoft Communication Control1), to achieve serial communication. ActiveX is a technology for application development under WINDOWS, and its core content is the Component Object Model (COM). This includes a series of attributes, methods, and events. The most commonly used attributes include CommPort Settings, PortOpen, Input, Output, Input Mode, Threshold, Threshold InBufferCount, InBufferSize, UFC760BE43 , OutBufferSize, CommEvent, etc. MSComm controls provide two ways to handle communication: event driven and query driven. Event driven approach ensures timely program response. Due to its high reliability, this article adopts an event driven approach. When writing sending and receiving programs, it is important to pay attention to the usage of several properties. For example, the Rthreshold and threshold properties play a decisive role in both sending and receiving Oncomm events.

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