Method for implementing communications between intelligent actuating mechanisms and field buses

Abstract

The invention provides a method for implementing communications between intelligent actuating mechanisms and field buses. The method is characterized in that intelligent actuating mechanism control cards and field bus communication cards are included; the control cards and the communication cards adopt the universal asynchronous receiver transmitter (UART) mode for communications; the communication cards transmit command frames to the control cards and the command frames comprise initial bytes, frame length, command words and check sums; after receiving the command frames, the control cards check the check sums in the command frames to judge whether the command frames are correct, if so, the control cards carry out processing according to the command words in the command frames and feed the processing results back to the communication cards in the form of response frames, and if not, the control cards return the error frames to the communication cards; the response frames comprise initial bytes, fault states and check sums; and after receiving the response frames, the communication cards check the check sums to judge whether the response frames are correct, if not, the communication cards discard the response frames, and if so, the communication cards store the fault states in the response frames. The method has the following advantages: the communication method is applied in a structure and the UART is adopted for communications, so the power consumption is low and the communication rate is high.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for communicating between an intelligent actuator and a field bus. Background technique [0002] At present, there are already many communication methods between multiple intelligent actuators, such as MOSBUS field bus, PROFIBUS field bus, FF field bus and HART field bus. These field buses solve the problem of data exchange between long-distance units very well. [0003] However, there are many deficiencies when the above fieldbus is applied to the communication between two intelligent units in a structure. [0004] In order to solve the long-distance communication, the communication protocol of the above-mentioned field bus generally adopts the isolated 485 communication method, which causes a large drive strength and thus has the problem of high power consumption. [0005] In addition, in order to meet the needs of communication distance and intrinsic safety, t...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the existing fieldbus communication protocol is required for communication between long-distance units, and it has the disadvantages of high power consumption, low communication rate and complex protocol when it is applied to a short distance inside a structure.

Images