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data setting device

A technology for setting devices and data, which is applied in the direction of data exchange network, data exchange through path configuration, digital transmission system, etc., and can solve the problem of not preparing a fragmented structure, etc.

Active Publication Date: 2016-08-24
ORMON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, protocols generally used in industrial networks (for example, CIP (Common Industrial Protocol: Common Industrial Protocol)) do not prepare such a fragmentation structure.

Method used

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Experimental program
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Embodiment Construction

[0029] Next, preferred embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the STRING type is exemplified by message communication using CIP (Common Industrial Protocol) between a computer (data setting device) and a PLC connected by EtherNet / IP (Ethernet / Internet Protocol). Examples of variables, but the scope of application of the present invention is not limited thereto. As long as the purpose is to rewrite a variable-length data-type variable terminated with a predetermined terminal code via the network, the present invention can be suitably applied regardless of network, protocol, data type, and the like. In addition, a network in a special field such as an industrial network has a small upper limit of the frame length that can be transmitted, and does not have a structure such as session management and fragmentation, so it can be said that it is particularly suitable for the application of the present inven...

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Abstract

In the present invention, the data to be written is divided into a plurality of divided data with a maximum length, and the offset of each divided data is calculated. First, a code for instructing to write a predetermined end to the start address of the data area is transmitted to the PLC. Next, transmit to the PLC a frame for instructing to write each segmented data other than the leading segmented data to the position corresponding to the offset from the start address of the data area, and finally, transmit to the PLC the frame for Instructs to write the frame of the leading divided data to the start address of the data area.

Description

technical field [0001] The present invention relates to a technique for rewriting variables set on a PLC via a network. Background technique [0002] In FA (Factory Automation: Factory Automation), the industrial network system constituted by connecting multiple slave devices and master devices (PLC: Programmable Logic Controller: Programmable Logic Controller) using a control system network (field network) Control of production equipment is performed, wherein the plurality of slave devices perform control and data collection of various production equipment, and the master device collectively manages these slave devices. In addition, the PLC installed in each production line or production base is connected to the upper computer through the information system network, and the system manager or engineer can use the computer to monitor the status and post-maintenance of each system. [0003] A general PLC has the following specifications: information used by a ladder program (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05H04L12/40
CPCG05B19/054H04L12/40169H04L12/4035H04L2012/4026G05B19/056G05B2219/13004
Inventor 永田雄大
Owner ORMON CORP