PLC Wireless Remote Control scheme

I. Overview

PLC = Programmable logic Controller, Programmable logic controllers, an electronic system for digital operation, designed for applications in industrial environments. It uses a class of programmable memory for its internal storage program, performs logic operations, sequential control, timing, counting and arithmetic operations, and other user-oriented instructions, and through digital or analogue input/output control of various types of mechanical or production processes.

At present, PLC at home and abroad has been widely used in steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automotive, textile, transportation, environmental protection, water treatment and cultural and entertainment industries, Visible plc is the core part of industrial automation control. The communication and control of PLC will be the change of communication network age.

Now we come to understand the PLC using wireless remote control of the way introduced, based on the PLC wireless communication is the mainstream trend of the current market, replacing the original local programming and control. Gradually tending to remotely manage control sessions.

Two. The development trend of PLC communication mode changes:

The main communication modes of PLC are RS232, RS485, Ppi/mpi, PROFIBUS dp/pa/fms Fieldbus, Ethernet bus, DEVICEnet bus, and wireless network.

With the limitations of local communication control, remote control of networked communications, wired and wireless access to the mainstream slowly. Ethernet port Communication and wireless network communication slowly in the PLC remote control replaced the original local serial port or bus mode control.

Three. plc Wireless remote control using wireless mode advantage

3.1, simplify engineering, reduce cabling costs:

Using 433m Wireless ad-Set network, the cabling of RS485 bus is realized. With wireless Wbee 1002, a point-to-point (Point-to-multipoint) wireless communication mode is implemented. Eliminating the cost of manual cabling, but also simplifies the progress of the project.

3.2 ,Reduce operational maintenance Costs:

The use of wireless ad-set network to the touch-screen configuration unified management monitoring, Cascade Wireless Communication module, the remote group network Wang Software remote Management control, less manual inquiry, to achieve unattended operation system. Improve the centralized remote management interface, realize the remote management control, reduce the later operation and maintenance cost.

3.3, SMS control and query improve remote control randomness:

WCTU is a wireless acquisition and transmission Control terminal, can realize remote and kingview software remote man-machine interface control, with SMS receiving center and SMS control function, can be at any time to query the PLC real-time analog volume, switching volume and other information, At the same time, the remote configuration modification of PLC and WCU remote parameter configuration can be realized by SMS command mode.

3.4. Safe and reliable data transmission:

Using GPRS/CDMA network format to ensure the coverage and popularization of the network, support operators APN/VPDN, encrypt the communication method to ensure the security of APN private network data communication effectively. At the same time can be superimposed wctu des, AES, 3DES Self-encrypting mode, to achieve a single-layer/two-tier wireless encryption method. Ensure that data communication is safe and reliable. There are guarantees for the safety and effectiveness of industrial automation control now.

Four. Network topology and field application diagram

Figure 1

Field Application:

Wind Turbine Control:

Thermal Network monitoring:

Water Quality Monitoring:

Boiler monitoring:

Instrument monitoring:

Related products:

Five. Function and application of products in the system

The system, using the front-end 433M Wireless autonomous network equipment Wbee 1002, the way through the RS485 bus, through the Modbus RTu protocol, to achieve point-to-Multipoint PLC master-slave relationship application, through the string mouth line and touch screen software to achieve local wireless remote monitoring. Through the bus and GPRS DTU (WCTU 30XX) products through the GPRS/CDMA network through the configuration Wang software virtual serial port (io/device) to achieve wireless remote human-machine interface management monitoring.

Xiamen for that communication of the Wbee 1002 and WCTU 30XX products after years of suffering on the market, has been adapted to the industrial automation industry applications, reliable industrial design standards, ten years of wireless communications in the field of the foundation. Ensure that customers in a variety of industry projects in the application of 24*7 hours unattended in the harsh industrial environment stable operation, fully embodies the reliability and stability of PLC wireless remote control.

At present, PLC wireless remote control at home and abroad has been widely used in steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automotive, textile, transportation, environmental protection, water treatment and other industries. The future will be to popularize other space in the field of industrial automation and explore new applications.

Http://www.winertech.com/realcaseinfo.asp?id=17

PLC Wireless Remote Control scheme