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Group master communication system and method for serially transmitting data in automation systems

A technology of automation technology and communication method, which is applied in the direction of program control, transmission system, and digital transmission system in sequence/logic controllers, which can solve problems such as slow communication speed, shorten processing time, shorten transmission path, and improve communication Effects of Speed ​​and Communication Efficiency

Active Publication Date: 2013-05-29
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] But the disadvantage of this method is that the communication speed between the basic module and the expansion module is quite slow because the serial communication needs to pass through all modules and requires all expansion modules to pay attention to the data sent by the basic module.

Method used

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  • Group master communication system and method for serially transmitting data in automation systems
  • Group master communication system and method for serially transmitting data in automation systems
  • Group master communication system and method for serially transmitting data in automation systems

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Embodiment Construction

[0020] figure 1 A current common motor branch system structure is shown in schematic form, which consists of a basic module M and five expansion modules S1 to S5. In this case, the base module M is a system master that communicates with a plurality of cascaded expansion modules. Among them, the basic module M is the basic equipment of a motor branch circuit, which contains all the basic functions required to prevent the motor controlled by the motor branch circuit from overload, short circuit to ground and overheating. The expansion modules S1 to S5 are connected to the basic device M via a serial communication link K via a system interface (not shown) of the basic device M. The expansion modules S1 to S5 shown here in schematic form can be additional devices, for example additional input / output modules, current or voltage monitoring modules or operating or display modules. In this way, the system interface of the basic module can be connected with the input terminal of the ...

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Abstract

A communication system and method are disclosed for serially transmitting data in automation systems. In at least one embodiment, the system includes a base module as the system master, a plurality of extension modules as the slaves and a bidirectional communication connection that serially connects the base module to the extension modules. A status as group master for the serially subsequent extension module is allocated to at least two of the extension modules, the base module communicating with the extension modules depending on said allocation.

Description

technical field [0001] The invention relates to a communication system for serial data transmission in automation technology as claimed in claim 1 and a corresponding communication method as claimed in claim 7 . Background technique [0002] The goal of automation technology is to enable machines or equipment to work independently without human influence. The better this goal is achieved, the higher the degree of automation. This requires communication between all levels of the machine or plant from the central control unit (the so-called programmable controller) to the field level motor branch or motor controller. [0003] In the process, the motor branch circuit protects and controls the motor independently of the higher-level central control unit. Even in the event of a programmable controller failure or communication with the programmable controller being blocked, the motor is fully protected and controlled. [0004] Currently known electric motor branches have been m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/403G05B19/04G06F13/42
CPCH04L12/403H04L12/4013H04L2012/4026
Inventor 斯特凡·拜尔马蒂亚斯·迈尔
Owner SIEMENS AG