CN201515458U - Wireless programmable controller - Google Patents

Abstract

The utility model relates to the field of monitoring equipment, aims to overcome the defects of the prior art and provide a wireless programmable controller, which can conduct stable communication with mass flow, and a data communication method of the controller. The wireless programmable controller comprises a processor of the traditional wireless programmable controller, a memory, an input/output circuit, a data communication controller, an isolation circuit, a wiring terminal and other structures, wherein the processor is respectively connected with the memory, the input/output circuit and the data communication controller; and the input/output circuit and the data communication controller are connected with the wiring terminal through the isolation circuit. The improved structure of the wireless programmable controller is further characterized in that a 3G module is arranged to be connected with the processor, and the principle of the utility model is that the 3G module is integrated inside the programmable controller, and a dedicated 3G communication interface is arranged to serve for wireless communication. The utility model has the advantages of greatly expanding the bandwidth of data communication, improving data processing capability and fulfilling the function of real-time video transmission.

Description

A kind of wireless programmable controller

Technical field

The utility model relates to monitoring equipment field, say so more specifically a kind of can carry out long-range big data quantity fast, stablize the wireless programmable controller and the data communication method thereof of communication.

Background technology

Wireless programmable controller is a kind of important data acquisition control of industrial circle and transmitting device, realizes the long-range management and control of industrial field device.

Along with industrialization and the information-based development trend that merges, industrial equipment develops towards the direction of intellectuality control, distributed management, networking operation.Wireless programmable controller is because easy for installation, and it is flexible to deploy to ensure effective monitoring and control of illegal activities, and controlled function able to programme has the incomparable superiority of traditional wired monitoring equipment, has obtained promoting rapidly with this wireless programmable controller.

Yet because technology limitation, present wireless programmable controller need carry out concrete configuration and management at concrete network type, agreement on network configuration management; If the user needs wireless high bandwidth then needs to set up expensive private radio broadband network.And along with the lengthening of communication distance, the cost of building communication network is high more, therefore existing wireless programmable controller generally is confined in the very little scope, generally can only be arranged in the Control Room on the offshore platform such as the monitoring client of offshore oil and gas field, can only realize the local wireless monitoring, be difficult to reach the purpose of remote monitoring.Such monitoring level does not reach the monitoring security requirement in high-risk place far away, because dangerous hidden danger occurs in case monitoring is local, remote monitoring center can't synchronization gain information, can't make quick measure and take precautions against dangerous generation.

Along with popularizing of development of technology and 3G (Third Generation) Moblie technology (3G), under the prerequisite of the normal function that does not influence existing industrial control system and make system utilize technology to carry out remote transmission to become a kind of demand.Yet, therefore just simply the 3G module is inserted on the traditional data interface of Programmable Logic Controller in the utilization to 3G technology on the Programmable Logic Controller field because the producer of tradition exploitation 3G communication chip does not relate to the exploitation of Programmable Logic Controller.Carry out data communication by " 3G controller-traditional data interface-buffer circuit-data communication controller-processor " such process, data arrive processor need carry out 3G controller and the two-layer data parsing of data communication controller, carrying out big flow communication, as video transmission, can produce hysteresis; And be subjected to the influence of traditional data interface and buffer circuit bandwidth, limited the ability to communicate of 3G network greatly.

And because the 3G (Third Generation) Moblie technology is just just popularized, and particularly China just began formally to run in 2008, stability of network does not also reach the requirement of security monitoring far away.High-risk in addition industry generally is to build in the place away from the urban district, and the distribution rareness of its mobile network base station has caused network stabilization can't be protected especially.Therefore the stability that how to improve communication also is the technical barrier of existing wireless programmable controller tackling key problem.

Because above-mentioned all technology limitation have now in high-risk place, as the oil gas field, wireless programmable controller can only be confined to as a kind of auxiliary watch-dog, and can't realize real-time video monitoring.Monitoring is reliably still adopted traditional wired monitoring equipment and is relied on the professional judgement that the experience staff is arranged, and can't demonstrate fully the superiority of wireless programmable controller.In order to get information about the situation of monitored site, the video monitoring technology also further is put into the research emphasis of wireless programmable controller of future generation.

The utility model content

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of wireless programmable controller and data communication method thereof that can carry out big stability of flow communication is provided.

The utility model is achieved through the following technical solutions above-mentioned purpose.

The wireless programmable controller that this patent is designed, the structures such as processor, memory, imput output circuit, data communication controller, buffer circuit, binding post and power of alterating and direct current that comprise the conventional wireless Programmable Logic Controller, processor is connected storage, imput output circuit and data communication controller respectively, imput output circuit is connected binding post with the data communication controller by buffer circuit, and the structure of its improvement is also to be provided with the 3G module and is connected with processor.Its principle is that the 3G module is integrated in Programmable Logic Controller inside, sets up special 3G communication interface, only provides service for wireless telecommunications.The 3G module comprises and is used for data are carried out standard 3G standard controller of resolving and the 3G standard transceiver that is used for the data transmission and receives that 3G standard controller and traditional imput output circuit, data communication controller directly insert the communication bus of processor by parallel way.Directly set up independent channel for wireless telecommunications on the communication bus of Programmable Logic Controller, communication process is " 3G controller-processor ".Walk around traditional circuit structure on the one hand, can not be subjected to the influence of traditional data interface and buffer circuit bandwidth, expanded the bandwidth of data communication greatly; Whole on the other hand communication process only carries out a data parsing, has improved data-handling capacity greatly, further makes the functions expanding of Programmable Logic Controller real-time video monitoring become realistic plan.

The utility model provides the data processing circuit of number of different types for connecting watch-dog, and described imput output circuit comprises one or more in analog quantity imput output circuit, digital quantity imput output circuit or the pulsed quantity imput output circuit at least.Described data communication controller comprises one or more in RS232 controller, RS485 controller or the ethernet controller at least.Multiple different data-interface is provided accordingly, and described binding post comprises one or more in I/O binding post, DB9 joint, RS485 binding post or the RJ45 joint at least.For access and buffered data, described memory comprises internal storage and outer extension memory.

For stability and the fail safe that improves system, 3G standard controller described in the utility model comprises three kinds of TD-SCDMA controller, W-CDMA controller and CDMA2000 controllers.W-CDMA also claims WCDMA, and full name is Wideband CDMA, also claims CDMA Direct Spread, means the wide band code division multiple access, and this is based on the technical specification that the GSM net develops out; CDMA2000 is the wideband CDMA technology of being come by narrowband CDMA (CDMA IS95) technical development, also becomes CDMAMulti-Carrier, takes proposition as the leading factor by QualCom North American Corp.; TD-SCDMA, full name is Time Division-Synchronous CDMA (a time-division synchronization CDMA), this standard incorporates current technology leading in the world such as intelligent radio, synchronization CDMA and software radio wherein, has aspects such as flexibility, frequency flexibility and cost in the availability of frequency spectrum, to business support and has unique advantage.This standard is that Chinese former Electric Communication Science and Tech. Inst. Ministry of Post and Telecommunic (Datang Telecom) proposes to ITU.Because the unsteadiness of wireless network adopts single network to carry out communication and will cause fail safe to be had a greatly reduced quality.Covered this three networks in China's scope simultaneously, the unlike signal power of zones of different differs, but all has at least one can satisfy the big flow communication of carrying out 3G generally speaking.The controller of the three big 3G network standards that above-mentioned current stability that therefore the utility model is integrated especially is best, the switching of can selecting the superior between three 3G networks is for data communication provides reliable guarantee.

Network interface is the standing interface in monitored site in the prior art, so the utility model further utilizes this interface to increase safeguard again one.The utility model is provided with the ICP/IP protocol analytical capabilities in embedded real time operating system, makes Programmable Logic Controller can support the ICP/IP protocol stack, carries out communication with general internet.Owing near the monitored site, generally all be provided with network interface, therefore can directly Programmable Logic Controller be connected with network interface, need not the other construction of line.Monitoring client can receive information and send a command to Programmable Logic Controller by the Internet, realizes remote monitoring as 3G network need not to set up in addition under the situation of communications service.As the auxiliary safeguard of 3G network, the fail safe that has further improved system can also be carried out the expansion of general networking function, and very economical.

Certainly except 3G network, the utility model also can be on binding post external other wireless communication modules, make functions such as the utility model compatible GPRS, SMS, CDMA1X, multimedia message.These modules can realize remote monitoring equally, though the data conveying capacity much smaller than 3G network, is applicable to data conveying capacity and the less demanding monitoring of real-time place.

Because the utility model has solved the flow and the stability problem of data, makes the real-time remote monitoring of video become the feasible scheme of essence.Therefore present technique can be provided with video monitoring devices connection binding post, for the monitor staff provides intuitively monitor video in real time, further improved the security monitoring ability of wireless programmable controller, make wireless programmable controller have the ability that comprehensively substitutes traditional wired monitoring equipment, embody the superiority of wireless programmable controller.

The concrete data communication method of above-mentioned wireless programmable controller may further comprise the steps:

The data transmission stage:

1. binding post receives field instrument with the monitor data of gathering, and is sent to processor by imput output circuit and data communication controller;

2. processor deposits monitor data in the memory in, and communication bus directly is sent to the 3G module and monitor data is carried out 3G standard resolves;

3. will directly send to the remote monitoring end through the monitor data that 3G standard is resolved by the 3G module;

The order reception stage:

4. the remote monitoring end passes through the 3G network transmitting control commands to wireless programmable controller;

5. the 3G module is carried out the 3G standard parsing after receiving control command, and the control command after processor will be resolved through 3G standard stores in the memory;

6. the order after processor will be resolved through 3G standard is sent to respective terminal by imput output circuit and data communication controller, realizes the control to field instrument.

In order to improve the stability of data communication, especially step 3. with step 4. in the 3G module according to selection of configuration TD-SCDMA network, W-CDMA network and CDMA2000 network, and adopt this network to set up communication link.

The utility model has solved the bottleneck problem of data communication in the inner directly integrated 3G module of wireless programmable control, shortens data handling procedure, and the bandwidth that has expanded wireless data communication has greatly improved data-handling capacity.Can between at least three general 3G networks, switch, guarantee the stability of wireless data communication, make wireless programmable controller can meet the monitoring stability requirement of high-risk industry.Utilized standing network interface can realize multiple tracks guarantee and multiple functions expanding cheaply.The utility model possesses remote live video monitoring expansion capability, adopts simple technology to realize wireless programmable controller of future generation, greatly reduces the cost of system development.Therefore this patent has outstanding substantive distinguishing features and obvious improvement with respect to prior art.

Description of drawings

Fig. 1 is a hardware block diagram of the present utility model;

Fig. 2 is a software architecture diagram of the present utility model;

Fig. 3 is a data flowchart of the present utility model;

Fig. 4 is an agreement system of selection flow chart of the present utility model.

Embodiment

The wireless programmable controller based on 3G (Third Generation) Moblie technology (3G) standard as shown in Figure 1 is applicable to industrial data collection and control, communication node, protocol conversion aspect.Wireless programmable controller comprises processor 1, analog quantity imput output circuit 2, digital quantity imput output circuit 3, pulsed quantity imput output circuit 4, RS232 controller device 5, RS485 controller 6, ethernet controller 7, buffer circuit 8, I/O binding post 9, DB9 joint 10, RS485 binding post 11, RJ45 joint 12, internal storage 13, outer extension memory 14,3G standard controller 15,3G standard transceiver 16 and power of alterating and direct current.

The annexation of its circuit is: with processor 1 is the center, with 3G standard controller 15, analog quantity imput output circuit 2, digital quantity imput output circuit 3, pulsed quantity imput output circuit 4, RS232 controller 5, RS485 controller 6, ethernet controller 7, interconnected between internal storage 13 and the outer extension memory 14, analog quantity imput output circuit 2, digital quantity imput output circuit 3, pulsed quantity imput output circuit 4, RS232 controller 5, RS485 controller 6 and ethernet controller 7 are interconnected with buffer circuit 8, buffer circuit 8 and binding post 9, DB9 joint 10, RS485 binding post 11, I/O RJ45 joint 12 is interconnected, and power of alterating and direct current is the said equipment power supply.

As shown in Figure 2, this wireless programmable controller also comprises the embedded RTOS real time operating system of collector, IEC61131-3 standard program software, 3G standard composing software, application software and communications protocol and based on the configuration software of PC.3G standard composing software and IEC61131-3 standard program software are the parallel RTOS real time operating system that inserts as can be seen from software configuration, the 3G standard composing software has independently data processing channel, has other priority of high one-level with respect to other data modes, improve the ability of data processing and transmission, on software configuration, realized big flow communication.Wireless programmable controller software based on 3G standard is the kernel driver that is carried by 32 bit processors, be implanted in the RTOS operating system (RealTime Operation System real time operating system) on it, IEC61131-3 standard composing software, the 3G standard composing software, application software and communications protocol are formed as: IEC61131-3 standard code, MODBUS RTU/ASCII/TCP agreement, DNP agreement, ICP/IP protocol, custom protocol software module.RTOS is in charge of system resource and task and interruption etc.The software of the bottom is device driver, and it directly drives hardware effort by the type decided of hardware.

Processor 1 described in the utility model, adopt technical grade 32 bit processors as the system core, gather analog quantity, digital quantity, pulse imput output circuit signal, the data that RS232 controller, RS485 controller, ethernet controller send, store internal storage 13 and outer extension memory 14 into, data are sent out by 3G standard controller 15 and 3G standard transceiver 16; By 3G standard controller 15 and 3G standard transceiver 16 with the storage of far-end to internal storage 13 and outer extension memory 14, by analog quantity, digital quantity, impulse output circuit signal, RS232 controller, RS485 controller, ethernet controller feed back to each on-the-spot industrial control equipment again.32 bit processors are as the core of system, and A/D, the D/A conversion and the storage of the I/O interface that collector carries are finished in the realization of complete operation system, composing software, communications protocol and interrupt correspondingly; Internal storage is used for storage code, configuration parameter and data, and outer extension memory is used for store historical data.

mainly comprise aspect being connected with inductor following several: have basic analog quantity input interface, digital-quantity input interface, pulsed quantity input interface, can the collection site instrument, as the signal and the state of pressure transmitter, temperature transmitter, fluid level transmitter, flowmeter (tape pulse output), flammable gas alarm, toxic gas alarm etc.; Have analog output interface circuit, digital-quantity output interface, pulsed quantity output interface and can control field instrument, as the switch of the aperture of butterfly valve, electromagnetically operated valve, rotating speed of motor etc.; Have RS232 interface, RS485 interface (baud rate can be set to 1200,2400,4800,9600,19200,38400,57600bps), Ethernet interface; Support MODBUS RTU/ASCII/TCP agreement, Ethernet ICP/IP protocol, DNP agreement and oneself definition communications protocol; By configuration software, can realize agreement selection and parameter configuration based on PC; Have status indicator lamp, as the processor state indicator light, analog quantity input and output, digital quantity input and output, pulsed quantity input and output indicator light, RS232 interface communication indicator light, network connection, communication indicator light etc. make things convenient for tracing trouble; Built-in flush type WEB server can be checked relevant device information by the IE browser.

Data acquisition of the present utility model as can be seen from Figure 3 and control flow the steps include: from [initiating hardware and memory] to [internal storage] to [the analog quantity input and output are gathered and control], [the digital quantity input and output are gathered and control], [the pulsed quantity input and output are gathered and control], [outer extension memory], [serial ports, the transmitting-receiving of RS485 controller], [ethernet controller transmitting-receiving], [transmitting-receiving of 3G standard controller].Wherein [serial ports, RS485 controller are received and dispatched] arrives [serial ports, the transmitting-receiving of RS485 interface] by [MODBUS, custom protocol are resolved], [ethernet controller transmitting-receiving] by [MODBUS TCP, DNP, ICP/IP protocol are unloaded] to [transmitting-receiving of RJ45 interface], [transmitting-receiving of 3G standard controller] is by [3G standard parsing] to [transmitting-receiving of 3G standard transceiver].Wherein [3G standard parsing] comprised [parsings of three kinds of standards of TD-SCDMA/WCDMA/CDMA2000].

Can understand agreement system of selection flow process of the present utility model in conjunction with Fig. 4, to [internal storage], divide four the tunnel from [initiating hardware and memory] then: the first via is to [setting up internal bus protocol analysis task], [operation internal bus protocol analysis task]; The second the tunnel is to [setting up MODBUS, custom protocol parsing task], [operation MODBUS, custom protocol are resolved task]; Third Road is to [setting up MODBUS TCP, DNP, ICP/IP protocol parsing task], [operation MODBUS TCP, DNP, ICP/IP protocol are resolved task]; The four the tunnel is to [set up 3G standard and resolve task], [the operation 3G standard is resolved task].Wherein [3G standard] comprised [three kinds of standards of TD-SCDMA/W-CDMA/CDMA2000].

From data acquisition and control flow and agreement system of selection flow process as can be seen, [3G standard parsing] is the data processing bus that inserts processor separately, only need directly to carry out data processing through a data parsing, improved the data-handling capacity of system greatly, for big flow communication provides hardware foundation.

The utility model is the wireless programmable controller based on 3G (Third Generation) Moblie technology (3G) standard, novel radio network collection, control and data transmission product for a kind of industrial automation control field, both can realize by the equipment of 3G standard network remote wireless collection, and itself also can be used as on-the-spot collection of industry spot control and Control Node and be linked in the 3G standard network with control band analog quantity input/output interface, digital quantity input/output interface, pulsed quantity input/output interface, RS232 interface, RS485 interface, Ethernet interface.3G (Third Generation) Moblie technology (3G) provides one to cover high speed wireless communications network widely for the industrial field device telemanagement, the wireless programmable controller of built-in 3G (Third Generation) Moblie technology possesses following advantage: technology maturation, network stabilization, wide coverage, it is convenient to insert; Can realize high speed data transfer; Interface type is abundant: contain AI, DI, PI data acquisition interface, AO, DO, PWM export control interface, and RS232, RS485, Ethernet communication interface can send to enterprise information system with produced on-site information very easily by 3G network.

The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; every foundation technical spirit of the present utility model all still belongs to the protection range of technical solutions of the utility model to any simple modification, equivalent variations and modification that above embodiment did.

Claims (9)

1. wireless programmable controller, comprise processor, memory, imput output circuit, data communication controller, buffer circuit, binding post and power of alterating and direct current, processor is connected storage, imput output circuit and data communication controller respectively, imput output circuit is connected binding post with the data communication controller by buffer circuit, it is characterized in that also being provided with the 3G module and is connected with processor.

2. wireless programmable controller according to claim 1, it is characterized in that described 3G module comprises 3G standard controller and 3G standard transceiver, 3G standard controller and imput output circuit, data communication controller directly insert the communication bus of processor by parallel way.

3. wireless programmable controller according to claim 2 is characterized in that described imput output circuit comprises one or more in analog quantity imput output circuit, digital quantity imput output circuit or the pulsed quantity imput output circuit at least.

4. wireless programmable controller according to claim 2 is characterized in that described data communication controller comprises one or more in RS232 controller, RS485 controller or the ethernet controller at least.

5. wireless programmable controller according to claim 2 is characterized in that described binding post comprises one or more in I/O binding post, DB9 joint, RS485 binding post or the RJ45 joint at least.

6. according to each described wireless programmable controller of claim 2 to 5, it is characterized in that described 3G standard controller comprises three kinds of TD-SCDMA controller, W-CDMA controller and CDMA2000 controllers.

7. according to each described wireless programmable controller of claim 2 to 5, it is characterized in that wireless programmable controller support ICP/IP protocol stack.

8. according to each described wireless programmable controller of claim 2 to 5, it is characterized in that being provided with video monitoring devices and connect binding post.

9. according to each described wireless programmable controller of claim 2 to 5, it is characterized in that described memory comprises internal storage and outer extension memory.

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