Method and device for communication between ECP system display terminal and head end control unit
A display terminal and control unit technology, applied in transmission systems, transportation and packaging, digital transmission systems, etc., can solve problems such as channel occupation, communication conflicts, and impact on communication quality
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[0105] Example one
[0106] See figure 1 , Which shows the flow chart of the communication method between the display terminal of the ECP system and the head-end control unit provided by the present invention. In the present invention, the display terminal of the ECP system is preset to have high communication priority, and the head-end control unit Low priority for communication. Therefore, in the present invention, when the ECP system display terminal and the head-end control unit send data messages at the same time, the data message sent by the ECP system display terminal is sent first, and the head-end control unit is sent after the data message of the ECP system display terminal is sent. The data message sent. Specific methods include:
[0107] Step 101: When the ECP system displays that the terminal intends to send the first data message and the head-end control unit intends to send the second data message at the same time, respectively determine the communication prioritie...
Example Embodiment
[0113] Example two
[0114] On the basis of the above example, please refer to figure 2 , Which shows another flow chart of the communication method between the display terminal and the head-end control unit based on the ECP system provided by the present invention.
[0115] In the foregoing embodiment, the present invention collectively refers to all types of data messages sent by the display terminal of the ECP system as the first data message. In this embodiment, the present invention will further prioritize multiple types of data messages included in the first data message. Preferably, it is defined that the first data message includes a first high priority data message and a first low priority data message.
[0116] Methods include:
[0117] Step 201: When the ECP system displays that the terminal intends to send the first data message and the head-end control unit intends to send the second data message at the same time, respectively determine the communication priorities of t...
Example Embodiment
[0132] Example three
[0133] On the basis of the above example, please refer to image 3 , Which shows another flow chart of the communication method between the display terminal and the head-end control unit based on the ECP system provided by the present invention, including:
[0134] Step 301: When the ECP system displays that the terminal wants to send the first data message, and the head-end control unit wants to send the second data message at the same time, respectively determine the communication priorities of the sender of the first data message and the sender of the second data message.
[0135] Step 302: When it is judged that the sender of the first data message has a high priority for communication and the sender of the second data message has a low priority for communication, it is further judged whether there are other data messages with the same priority as the first high priority data message. If the data message to be sent exists, go to step 303, if not, go to step...
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