CN101252493A - DeviceNet on site bus digital-analogy I/O communication apparatus based on non-standard wireless radio frequency technique - Google Patents
DeviceNet on site bus digital-analogy I/O communication apparatus based on non-standard wireless radio frequency technique Download PDFInfo
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- CN101252493A CN101252493A CNA2008100525786A CN200810052578A CN101252493A CN 101252493 A CN101252493 A CN 101252493A CN A2008100525786 A CNA2008100525786 A CN A2008100525786A CN 200810052578 A CN200810052578 A CN 200810052578A CN 101252493 A CN101252493 A CN 101252493A
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Abstract
The invention relates to a Device Net site bus digital simulation I/O communication device based on the non-standard wireless radio frequency technology. The invention solves the problems that the objects such as the moving object or the sensor on the rotating equipment, a hand-held data gathering device, the remote single device, the sensor and the performer etc., the device which is temporarily arranged under a plurality of industry environments and the process control environments are different to be connected by adopting a wired physical medium and even the connection can not be realized, thereby the application scope of the Device Net bus is increased. The device of the invention comprises a wireless transmission module used for performing the wireless communication; a wireless slave node used for performing the I/O data processing and controlling the data communication of the wireless transmission module, a Device Net node which is taken as a wireless primary node to receive the data of the wireless slave node, simultaneously, hitched on the Device Net network as the slave node to ensure that the data received by the wireless is taken as a data source to perform the data communication with the Device Net main station. The device of the invention adopts the non-standard wireless radio frequency technology, has no complex protocol layer, and has the advantages of low power consumption and low cost.
Description
[technical field]:
The present invention relates to a kind of DeviceNet digital analog I/O communicator based on the non-standard wireless radio-frequency technique, it can support the DeviceNet message to handle, and can carry out remote access and control by DeviceNet.Simultaneously with applications of wireless technology in the DeviceNet fieldbus, realized wireless transmission to field data.
[background technology]:
DeviceNet is a kind of communication bus cheaply.It is connected to network with industrial equipment, thereby has eliminated expensive hardwire cost.The direct interconnection property improvement communication of equipment room, considerable device level diagnostic function is provided again simultaneously, this is difficult to realize by hardwire I/O interface.DeviceNet is a kind of simple Networking Solutions ﹠ provisioned, and it has reduced the cost and the time of hardwire and mounting industrial automation equipment when providing multiple vendor with the interchangeability between base part.
The characteristics of non-standard wireless radio-frequency technique are there is not complicated communication protocol, and the data link layer protocol of whole radio communication all is integrated in the hardware chip, has low cost, the advantage that the construction cycle is short.Only need the application of simple wireless connections at some, as dwelling house and building automatic, industrial control equipment etc., the scheme that the non-standard wireless radio-frequency technique can be used as a kind of low cost, low-power consumption, can develop fast.
[summary of the invention]:
To the present invention seeks to solve the wired physical medium of employings such as mobile object under industrial environment and the process control environment, slewing difficult or can't realize the problem of data communication providing a kind of DeviceNet field bus digital analog I/O communicator based on the non-standard wireless radio-frequency technique at all.
The present invention design comprises that wireless the DeviceNet node can be directly connected on the bus from node and DeviceNet node, need not special bus access device and just can communicate with other nodes on the bus.Wirelessly adopted the non-standard wireless radio-frequency technique from node, its data transmission bauds is fast, can handle as required the digital simulation amount and carries out radio communication with DeviceNet from node at bottom.
DeviceNet field bus digital analog I/O communicator based on the non-standard wireless radio-frequency technique provided by the invention comprises:
1) wireless transport module: the digital quantity analog quantity is carried out wireless transmission.Radio transmitting and receiving chip in the wireless transport module is chosen the radio transmitting and receiving chip that nRF24L01.nRF24L01 is the 2.4GHz Ultra Low Cost of the built-in link layer logic of a technical grade, the communication of support multi-point, maximum transmission rate reaches 2Mbit/s, and the BELAND toilet article have higher transmission speed.The complexity of link layer control minimizing MCU that embeds and cost and improved reliability of data transmission, different with bluetooth is, nRF24L01 does not have complicated communication protocol, and it is fully to user transparent, and the SPI interface by a standard is connected with peripheral controllers.In whole wireless system, with the realization modularization of wireless transmission, promptly design and be specifically designed to the module that realizes wireless data transmission, only reserve and be used for the interface that is connected with MCU.
2) wireless from node: that the digital quantity analog quantity is carried out preliminary treatment and controlled wireless transport module.Wirelessly form by three parts: wireless module, microcontroller, data acquisition unit from node circuit.Wireless module is connected with microcontroller by the SPI interface, realizes the transmitting-receiving of data.Microcontroller adopts AT89S52, the main reading of data collecting unit data that realize, the function of control wireless module transmitting-receiving, the design of data acquisition unit is more flexible, microcontroller is chosen the interface between conduct of P0 mouth and the data acquisition unit, and the simplest design can be a toggle switch, and the state of toggle switch is obtained by the state that reads the P0 mouth by microcontroller, certainly, also can do different selections according to demand.For example when selecting to read analog quantity, as long as the digital-quantity output interface of analog to digital conversion circuit is connected with the P0 mouth of microcontroller.
3) DeviceNet node: be used for carrying out I/O from node and communicating by letter, simultaneously as the slave unit that articulates on the DeviceNet fieldbus, with the DeviceNet master station communication with wireless.Circuit mainly is made up of 3 parts: microcontroller AT89S52, CAN controller SJA1000, CAN bus driver 82C250.The P1 mouth of microcontroller is connected with wireless module, the P0 mouth is connected with SJA1000, the main initialization of being responsible for wireless module and SJA1000, reception and transmission by control wireless module realization wireless data realize the reception and the transmission of bus data by control SJA1000.The CS end of SJA1000 is connected to the P2.0 of microcontroller, and P2.0 is that SJA1000 can be chosen in 0 o'clock MCU chip external memory address, and MCU can carry out corresponding read-write task to SJA1000 by these addresses.
Advantage of the present invention and good effect: this device has very strong flexibility and pliability, can realize the wireless transmission of digital quantity or analog quantity (carrying out AD conversion back), solved the object under many industrial environments and the process control environment, as the transducer on mobile object or the slewing, hand-held data acquisition equipment, setting up of distance is equipped with, transducer, actuator etc., the interim device of installing, the problem that adopts wired physical medium to connect difficulty even can't realize.Simultaneously, also expanded the range of application of DeviceNet network.
[description of drawings]:
Fig. 1 is the block diagram of communicator provided by the invention;
Fig. 2 is the wireless transport module circuit diagram;
Fig. 3 is wireless from the node circuit schematic diagram;
Fig. 4 is wireless from the node procedure flow chart;
Fig. 5 DeviceNet is from the node circuit schematic diagram;
Fig. 6 DeviceNet is from the node procedure flow chart.
[embodiment]:
As shown in Figure 1, the DeviceNet field bus digital analog I/O communicator based on the non-standard wireless radio-frequency technique provided by the invention comprises:
1) wireless transport module: be used to carry out RFDC (physical circuit is referring to Fig. 2).
2) wireless from node: as to be used to carry out the I/O data processing, to comprise AD conversion, the digital quantity analog quantity is carried out preliminary treatment go forward side by side (physical circuit are referring to Fig. 3) such as line data transmission;
3) DeviceNet node: as wireless host node, receive wireless data, be articulated in simultaneously on the DeviceNet fieldbus, be used for carrying out I/O communicate by letter (physical circuit is referring to Fig. 5) with the DevicNet main website from node transmission.
Among the present invention, the Device node receives the digital quantity and the analog quantity (AD change the back) of collection in worksite by wireless mode, and according to the explanation of DeviceNet agreement other nodes from the network are obtained to instruct or data.
To insert the DeviceNet bus based on the DeviceNet field bus digital analog I/O communicator of non-standard wireless radio-frequency technique, at first carry out the setting of node M AC ID and communication baud rate.Initialization DeviceNet object properties subsequently, initialization DeviceNet messaging parameter is provided with timer and CAN control register.Like this, the device initialize process is finished.On the DeviceNet bus, send then and repeat MAC ID detection, have or not identical MAC ID on the testbus.Detection has just connected DeviceNet bus (concrete workflow is referring to Fig. 6) by posterior nodal point.
After connecting foundation, node just can have been realized normal exchanges data by polling mode wireless between node and DeviceNet host node.
Claims (1)
1, a kind of DeviceNet field bus digital analog I/O communicator based on the non-standard wireless radio-frequency technique is characterized in that this device comprises:
1) wireless transport module: be used to carry out RFDC;
2) wireless from node: be used to carry out the I/O data processing, and the data communication of control wireless transport module;
3) DeviceNet node: as wireless host node, receive wireless data, be articulated in simultaneously on the DeviceNet network as from node from node, with wireless receiving to data carry out data communication as data source and DeviceNet main website.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100525786A CN101252493A (en) | 2008-04-01 | 2008-04-01 | DeviceNet on site bus digital-analogy I/O communication apparatus based on non-standard wireless radio frequency technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100525786A CN101252493A (en) | 2008-04-01 | 2008-04-01 | DeviceNet on site bus digital-analogy I/O communication apparatus based on non-standard wireless radio frequency technique |
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| Publication Number | Publication Date |
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| CN101252493A true CN101252493A (en) | 2008-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100525786A Pending CN101252493A (en) | 2008-04-01 | 2008-04-01 | DeviceNet on site bus digital-analogy I/O communication apparatus based on non-standard wireless radio frequency technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587735A (en) * | 2012-02-13 | 2012-07-18 | 深圳市中控生物识别技术有限公司 | Magnetic lock with built-in wireless module |
| CN103425090A (en) * | 2012-06-05 | 2013-12-04 | 山东博润工业技术股份有限公司 | Fieldbus control system of jet flow drying equipment |
| CN104102207A (en) * | 2014-07-10 | 2014-10-15 | 精技电子（南通）有限公司 | Device net slave station control mechanism of semiconductor automatic rubber tearing machine |
-
2008
- 2008-04-01 CN CNA2008100525786A patent/CN101252493A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587735A (en) * | 2012-02-13 | 2012-07-18 | 深圳市中控生物识别技术有限公司 | Magnetic lock with built-in wireless module |
| CN103425090A (en) * | 2012-06-05 | 2013-12-04 | 山东博润工业技术股份有限公司 | Fieldbus control system of jet flow drying equipment |
| CN104102207A (en) * | 2014-07-10 | 2014-10-15 | 精技电子（南通）有限公司 | Device net slave station control mechanism of semiconductor automatic rubber tearing machine |
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Open date: 20080827 |