Communication method for parallel driving system

Abstract

The invention discloses a communication method for a parallel driving system. The method is used for an optical fiber communication network with multiple servo drivers connected in parallel. The network comprises a master node and N slave nodes, wherein each node corresponds to a servo driver; communication network ports and synchronous signal ports of the master node and the slave nodes are connected stage by stage for communication transmission of non real-time messages and real-time synchronous signals; the master node sends out a bus message and transmits the bus message to the slave nodes stage by stage; and each slave node extracts a switching signal of the master node from the bus message and inserts feedback message information of the slave node until the last slave node, namely, a network terminal node, returns a network terminal message containing the feedback message information of each slave node to the master mode. The method is simple in communication protocol, low in hardware cost and high in practicality; an accurate synchronous action is achieved; the communication network is more simplified in structure; the switching time delay compensation is accurate; and the method can be effectively used for communication of the parallel driving system.

Description

technical field [0001] The invention relates to an industrial bus communication technology, which is applicable to the field of speed regulation of high-power AC motors, and specifically relates to a method for realizing a communication mechanism under a driver multi-machine parallel system. Background technique [0002] At present, in the drive multi-machine parallel system, the modules have master and slave functions in terms of control functions. In order to complete the data interaction of the master / slave module within one current loop control cycle, it is necessary to use a high-speed physical layer transceiver and a communication interaction method different from the CSMA / CD of the traditional bus. [0003] Chinese invention patent CN1745546A "Network Coupler, Network and Data Processing Method for Ethernet Information" provides a processing method suitable for Ethernet network and data, which has a higher utilization rate than general Ethernet communication bus messa...

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Problems solved by technology

[0005] The problem to be solved by the present invention is: the existing technology has the problems of high development cost, high complexity and low efficiency in the communication processing method of the driver multi-machine parallel system

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