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Industrial control system based on field bus and control network

An industrial control system and control network technology, which is applied in bus network, comprehensive factory control, comprehensive factory control, etc., can solve the problems of high performance requirements, high cost, and inability to take into account hardware cost overhead and stability of the main station processor, etc. Achieve the effect of shortening the development cycle, reducing performance requirements, and reducing costs

Active Publication Date: 2011-02-16
无锡苏惠信息技术服务有限公司
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies of high performance requirements, high cost, and inability to take into account hardware cost overhead and stability of the master station processor of the existing industrial control system, the prese

Method used

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  • Industrial control system based on field bus and control network
  • Industrial control system based on field bus and control network
  • Industrial control system based on field bus and control network

Examples

Experimental program
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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] refer to Figure 1 to Figure 12 , an industrial control system based on a field bus and a control network, including a master station, a slave station and a network communication protocol, and a dual port is used between the main processor subsystem on the master station and the main communication protocol stack on the master station The SRAM exchanges data, and periodically and automatically completes communication between the described main communication protocol stack and the slave communication protocol stack on the slave station; the described slave station includes a slave communication protocol stack and an I / O controller, and the slave station includes a slave communication protocol stack and an I / O controller, and the slave station The communication protocol stack receives control instructions sent by the master station, and can also receive input termi...

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Abstract

The invention discloses an industrial control system based on a field bus and a control network, comprising a master station, a slave station and a network communication protocol, wherein a master processor subsystem on the master station and a master communication protocol stack exchange data by double-port SRAM, and the master communication protocol stack and a slave communication protocol stack periodically and automatically communicate; the slave communication protocol stack of the slave station receives a control command sent by the master station, simultaneously can receive input terminal state information sent from other slave stations and can periodically send the input terminal state of an I/O controller to the network; the network communication protocol is coded by Manchester; in each communication period, the master communication protocol stack on the master station automatically sends an initial frame and successively sends a data frame to each slave station according to a set address sequence, and each slave station sends a response frame according to the same address sequence. The invention can effectively lower the performance requirement on the master station processor, has low cost and strengthens stability while hardware cost overhead is low.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to an industrial control system based on a field bus and a control network, belonging to a control station-field instrument controller system in the field of industrial control. Background technique [0002] In the new generation of Fieldbus Control System (FCS), control network technology is extremely important. Existing control networks include industrial Ethernet, CAN, Device Net, ISA / SP50, ProfiBus, Foundation Fieldbus, ASI, HART, etc. When using these network technologies to establish a control network, special network controllers and network interface integrated circuits must be used, and some networks require users to pay for use, which increases the cost of users. In addition, the first three control networks are uncertain networks, that is, the network frame transmission delay is uncertain and lacks real-time performance. The well-known high-level protocols such as Modbu...

Claims

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Application Information

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IPC IPC(8): G05B19/418H04L12/40
CPCY02P90/02
Inventor 王忠飞
Owner 无锡苏惠信息技术服务有限公司
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