Wireless remote PLC (Programmable Logic Controller) monitoring system and application thereof
A remote monitoring system and remote monitoring technology, applied in the direction of electrical program control, program control in sequence/logic controller, comprehensive factory control, etc., can solve the problems of inability to realize control, limited data preprocessing ability of modem, and limited scope of application, etc. Problems, easy to maintain, easy to adjust deployment, easy to expand the effect
Inactive Publication Date: 2012-09-05
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
This solution can remotely monitor the PLC, modify the monitoring program and troubleshoot remotely, but the key node devices are connected by wires, which cannot achieve more flexible control, and the data preprocessing capability of the modem is limited, which limits its applicability scope
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[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0035]There are many PLC controllers distributed in the manufacturing workshop, which play an important role in the industrial control of workshop production. In order to better control the production, it is hoped that the PLC can be monitored anytime and anywhere. Generally speaking, the controller and PLC are wired through serial ports, USB and other peripheral interfaces, which cannot realize remote and mobile flexible control; on the other hand, it is also necessary to obtain the operating status of the PLC and the controlled object at any time to control the production process.
[0036] Such as figure 1 As shown, the "PLC wireless remote monitoring system" of the present invention includes a host server, several remote monitoring clients, a ZigBee coordinator node, several ZigBee routing nodes, and several PLC control nodes.
[0037] On ...
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The invention discloses a wireless remote PLC (Programmable Logic Controller) monitoring system comprising a host server, remote monitoring client sides, a ZigBee coordinator node, ZigBee router nodes, PLC control nodes and PLCs. The PLC control nodes are in connection and communication with the PLCs, and the host server is in communication with the remote monitoring client sides and the ZigBee coordinator node; control information of the remote monitoring client sides is transmitted to the PLC control nodes by virtue of the ZigBee coordinator node, and the remote monitoring client sides are used for receiving operation state information of the PLCs and workshop equipment, which is transmitted by virtue of the PLC control nodes; and the ZigBee coordinator node is used for controlling ZigBee wireless sensor networks, the PLC control nodes are in connection and communication with the ZigBee router nodes, and the control information or the operation state information is transmitted between the PLC control nodes and the ZigBee coordinator node by virtue of the ZigBee router nodes. The invention also discloses a method for acquiring the PLC operation information and controlling the PLCs by virtue of the monitoring system. The wireless remote PLC monitoring system can be used for flexibly controlling the PLCs and timely acquiring the control and operation state information of the PLCs and controlled targets on the basis of a wireless sensor network technology, and is simple to operate and easy to maintain and expand.
Description
technical field [0001] The invention relates to the technical field of remote monitoring systems, in particular to a PLC wireless remote monitoring system and its application. Background technique [0002] ZigBee developed in recent years is a low-power personal area network protocol based on the IEEE802. Wireless communication and low-power embedded technology have the characteristics of low power consumption, low cost, low data volume, simple deployment, strong scalability, large network capacity, short delay, and communication security. The Zigbee network is mainly established for the transmission of industrial field automation control data. It can monitor, perceive and collect information of various environments or monitoring objects in the network coverage area in real time, and transmit it to the observer in the form of self-organized multi-hop wireless network. Automatic perception of industrial sites. [0003] Programmable Logic Controller (PLC) is a general-purpos...
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IPC IPC(8): G05B19/418G05B19/05
CPCY02P90/02
Inventor 朱海平于红丞钟小勇邵新宇张国军何非喻道远
Owner HUAZHONG UNIV OF SCI & TECH
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