KR100235668B1 - Ron works network signal converting apparatus - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

LONWORKS NETWORK

2. The technical problem to be solved by the invention

Since conventional conductor transmission lines are used in the conventional Loneworks network, noise is generated due to electromagnetic induction induced in transmission media such as twisted pairs or power lines, and data loss and reliability are reduced, and the distance between Loneworks network media and nodes The stub length is set to 3m at 78.1kbps and 30cm at 1.25Mbps, so the stub length exceeds the specified value when the network media cannot access the node.

3. Summary of Solution to Invention

The data transmitted from the node connected to the Ronworks network media 100 is converted into an optical signal and transferred to the node connected to the optical fiber 400, and the data transmitted from the node is converted to a Ronworks signal to convert the data into the Ronworks network media (100). Serial gateway 200 for transmitting to the node connected to; Photoelectric conversion and processing unit for converting the optical signal transmitted from the serial gateway 200 to an electrical signal and processing, and converts the electrical signal back to an optical signal to transmit to another node 500 connected to the optical fiber It is characterized by consisting of (300).

4. Important uses of the invention

It is applied to convert transmission media signal in LoneWorks network.

Description

Loneworks Network Signal Inverter

In general, data transmission methods are classified into a method using an exclusive communication protocol and a Lonworks, Profi bus, Devicenet, and CAN bus using a commercial communication protocol.

The configuration of exclusive communication protocols is restricted in terms of network scalability and lack of data reliability, data transfer between different models, and difficulty in connecting external devices.Commercialized protocol methods are defined for each network method. Because the protocol is used, any product that adopts the same network method can be used to configure the network, so network scalability, data reliability, and connection between different models are desired.

Among the networks commercialized above, the LonWorks network uses twisted pair, power line, optical fiber, and wireless methods, and Lonworks, RS-232C, Lonworks, and RS-485 methods are used for serial gateways that convert data on Lonworks networks to other network types. Has been developed and mainly used.

1 is a view illustrating a LonWorks network configuration mainly used as described above, a LoneWorks network media 1, a Loneworks node 2 connected to the Loneworks network, and data transmitted from the Loneworks node 2; Converts to RS-232C data and performs reverse conversion thereof, and an RS-232C node 5 connected to the first serial gateway 3 and an RS-232C cable 4. ), A second serial gateway 6 for converting data transmitted from the Lonworks node 2 into RS-485 data and performing inverse conversion thereof, and the second serial gateway 6 and an RS-485 cable. It consists of an RS-485 node (8) connected by (7).

The operation of the conventional LoneWorks network configured as described above is as follows.

First, the data (non-protocol, LONTALK) transmitted from the Lonworks node 2 connected to the Loneworks network media 1 is converted into a RS-232C signal at the first serial gateway 3, and an RS-232C cable 4 Is transmitted to the RS-232C node (5), and the data transmitted from the RS-232C node (5) is transmitted to the first serial gateway (3) through the RS-232C cable (4) described above. After conversion to, it is passed on to the Loneworks node (2) or another node.

In addition, the data (non-protocol, LONTALK) transmitted from the Lonworks node 2 is converted into the RS-485 signal at the second serial gateway 6, and the RS-485 node (8) via the RS-485 cable (7). Data transmitted from the RS-485 node 8 is transferred to the second serial gateway 6 through the RS-485 cable 7 and converted into non-data, and then the Lonworks node 2 It is forwarded to another node.

However, since the Lonworks network uses a common conductor transmission line, noise caused by an electromagnetic induction induced in a transmission medium such as a twisted pair or a power line may cause a loss of data and a decrease in reliability.

In addition, the stub length, which is the distance between the Loneworks network media and the node, is specified as 3m at 78.1kbps and 30cm at 1.25Mbps, so if the network media cannot be accessed from the node, the stub length will exceed the specified value and the reliability of data will be degraded. There was also a problem.

Therefore, the present invention has been proposed to solve all the problems of the conventional Lonworks network as described above,

An object of the present invention is to provide a LoneWorks network signal conversion device to improve the reliability of data by removing noise caused by electromagnetic induction induced in transmission media such as twisted pairs or power lines using common conductor transmission lines in LONWORKS networks. To provide.

It is another object of the present invention to provide a LoneWorks network signal converter which eliminates the stub length limitation by connecting each node in a daisy chain method using an optical fiber.

Technical means for achieving the objects of the present invention,

Serial data converting data transmitted from a node connected to a Loneworks network media to an optical signal by converting it to an optical fiber connected node, and data transmitted from the node is converted to a Loneworks signal and transmitted to a node connected to the Loneworks network media A gateway; The optical signal transmitted from the serial gateway is converted into an electrical signal and processed, and the optical signal is converted into an optical signal and transmitted to another node connected with an optical fiber.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a conventional LoneWorks network configuration diagram,

2 is a LoneWorks network configuration according to the present invention,

3 is a detailed configuration diagram of each part of FIG. 2;

4 is a circuit diagram illustrating a network signal conversion in the present invention;

5 is a timing diagram of data transmission between a neuron chip and a microprocessor in the present invention.

(A) to (E) is a timing diagram when transferring data from a neuron chip to a microprocessor,

(F) to (I) are timing charts when data is transferred from a microprocessor to a neuron chip.

Explanation of symbols for the main parts of the drawings

100: Loneworks Network Media 200: Serial Gateway

300, 500, 600: photoelectric conversion and processing unit 400: optical fiber

2 is a block diagram of a LoneWorks network according to the present invention.

As shown therein, the serial gateway 200 converts data transmitted from a node connected to the Loneworks network media 100 into an optical signal and performs inverse conversion thereof; The photoelectric conversion and processing unit converts the optical signal transmitted from the serial gate 200 into an electrical signal, processes the optical signal, and converts the electrical signal back into an optical signal and transmits the optical signal to another node 500 connected to the optical fiber. 300; It is composed of a plurality of photoelectric conversion and processing unit 500 and 600 connected to the photoelectric conversion and processing unit 300 and the optical fiber 400 to perform the same operation as the photoelectric conversion and processing unit 300. do.

In the above, the serial gateway 200 is a RonWorks transceiver 201 for interfacing the Ron Works data transmitted from a node connected to the Ron Works network media (100) and the Ron Works transceiver according to the control signal generated from the control logic 202 The neuron chip 203 and the neuron chip 203 which store the RonWorks data obtained in the 201 in the dual port RAM 206 and transfer the data obtained from the dual port RAM 206 to the Ron Works transceiver 201. A control logic 204 for generating an operation clock of the control panel and generating a control signal for data processing, a ROM 204 in which a program for data processing of the neuron chip 203 is embedded, and the neuron chip 203 RAM 205 for temporarily storing the data processed in the; The dual port RAM 206 stores data transferred from the neuron chip 203 and data transferred from the microprocessor 206, and operates according to a program stored in the ROM 209. To store the data stored in the dual-port RAM 206 by polling at regular intervals, reading the stored data, and transferring the stored data to the serial / parallel data conversion unit 213 and storing the data transferred from the serial / parallel data conversion unit 213. 208, a RAM 210 for temporarily storing data processed by the microprocessor 208, a dip switch 211 for setting a data transmission rate, a parity bit presence and a stop bit length, The control logic 212 generates a clock for the microprocessor 208 to operate, and the parallel data transmitted from the microprocessor 208 is converted into serial data and the inverse thereof. A serial / parallel data conversion unit 213 for performing an operation, and an opto-electric conversion unit 214 for converting data transmitted from the serial / parallel data conversion unit 213 into an optical signal and performing inverse conversion thereof. .

In addition, the photoelectric conversion and processing unit 300 includes a first photoelectric conversion unit 301 for converting an optical signal transmitted from the serial gateway 200 into an electrical signal, and the first photoelectric conversion unit. A serial / parallel converter 302 for converting serial data obtained in step 301 into parallel data, and for processing data transmitted from the serial / parallel converter 302 according to a clock generated by the control logic 304. The electrical signal obtained by the microprocessor 303 and the first photoelectric conversion unit 302 is converted into an optical signal and transferred to the other node 500 connected to the optical fiber 400, and the node 500 is connected to the optical signal 400. The second photoelectric conversion unit 307 converts an optical signal transmitted from the optical signal into an electrical signal.

Referring to Figures 2 to 5 attached to the operation of the LoneWorks network according to the present invention configured as described above in detail as follows.

First, data transmitted from a node connected to the Loneworks network media 100 is received by the serial gateway 200 and then converted into an optical signal for transmission to another node.

That is, as shown in FIG. 3, the serial gateway 200 receives the Ronworks data transmitted from the node in the Ronworks transceiver 201 and delivers the Ronworks data to the neuron chip 201, and the neuron chip 203 The data received by the program stored in the ROM 204 is stored in the dual port RAM 206 according to the operation clock and the control signal generated by the control logic 202. When the data storage is completed, the " data transfer completion message " An interrupt is generated by writing or manipulating the input / output line to inform the microprocessor 208 that the data has been transmitted. In addition, when data transmission is performed, the reverse operation is performed, and upon recognizing an interrupt that there is a data transmission message transmitted from the microprocessor 208, the transmission data stored in the dual port RAM 206 is read, and then the LoneWorks transceiver 201 is received. ) So that data is sent.

At this time, the RAM 205 serves to store the calculated result or a variable in use, and the control logic 202 generates a clock required for the operation of the neuron chip 203 and selects a chip selection signal for selecting ROM / RAM. Etc.

Here, the timing of notifying that the data is transmitted to the microprocessor 208 after receiving the data from the neurochip 203 stores the received data in the dual port RAM 206 as shown in FIG. At this point of completion, a transmission completion signal is generated as shown in (B). Then, at the same timing as (C), the microprocessor 208 recognizes the interrupt, reads the data stored in the dual port RAM 206 at the same timing as (D), and at the point where the reading of the data is completed (E). The data reception completion message such as) will be transmitted.

On the other hand, the microprocessor 208 operates according to the program stored in the ROM 209, polls the dual port RAM 206 at regular intervals to check whether a "data transfer completion message" exists, and interrupts that data has been transmitted. When it is recognized, the data stored in the dual port RAM 206 is extracted and transferred to the serial / parallel data converter 213.

At the time of data transmission, the transmission data is stored in the dual port RAM 206 at the timing as shown in FIG. 5F, and the data transmission completion message is transmitted at the timing as shown in (G).

In this case, the RAM 210 stores a calculated result or a variable in use, and the dip switch 211 sets a data transmission rate or sets a parity bit presence and a stop bit length, and controls the control logic ( 212 provides an operating clock of the microprocessor 208.

Meanwhile, the serial / parallel conversion unit 213 converts the parallel data obtained from the microprocessor 213 into serial data and transmits the serial data to the photoelectric conversion unit 214. The transmission data obtained is converted into parallel data and transmitted to the microprocessor 208.

Then, the photoelectric conversion unit 214 converts the serial data obtained from the serial / parallel data conversion unit 213 into an optical signal and transmits the optical signal to the optical fiber 400 so that the optical signal is received at another node. The data received through the 400 is converted into an electrical signal, as opposed to the above, and transmitted to the serial / parallel data converter 214.

The optical cable 215 serves to interface the optical signal to other connected peripheral devices.

Meanwhile, the photoelectric conversion and processing unit 300 connected to the optical fiber 400 converts the optical signal received by the first photoelectric conversion unit 301 into an electrical signal, and the serial-parallel conversion unit. 302 converts the received electrical serial data into parallel data and delivers it to the microprocessor 303.

Then, the microprocessor 303 is operated by a program stored in the ROM 305, and processes the received data according to the operation clock generated by the control logic 304, and converts the transmission data into a serial / parallel conversion unit ( 302).

In addition, the second photoelectric conversion unit 307 converts the electrical signal converted by the first photoelectric conversion unit 301 into an optical signal and transmits the converted optical signal to the optical fiber 400 to thereby convert the other photoelectric conversion and The processing unit 500 receives and processes it, and the other photoelectric conversion and transmission optical signals transmitted from the processing unit 500 are converted into electrical signals and transferred to the first photoelectric conversion unit 301. Do it.

Then, the first pre-op converter 301 converts the transmission data of another node and the transmission data of its own node obtained from the serial / parallel conversion unit 302 into an optical signal and transmits the optical signal to the serial gateway 200.

Herein, the configuration in the other photoelectric conversion and processing unit 500 and 600 is the same as the configuration of the photoelectric conversion and processing unit 300 described above, and thus the operation thereof is also the same.

There is no problem in data transmission between two nodes in a network using the optical fiber as described above, but when a plurality of nodes are sequentially connected, the signal is gradually attenuated by the loss of signal and the distribution principle of the signal at the junction of the optical fiber. Although it is difficult to connect a plurality of nodes and use an optical amplifier and an optical multiplexer, this phenomenon can be eliminated, but there are limitations in application because the number of circuits of the optical fiber cable and the price of the optical amplifier are high.

For example, if there are 10 nodes connected sequentially (assuming that each node has a split ratio of input 10: output 90),

The output signal of node 1 becomes 1, the input signal of node 2 becomes 1 * 0.1 to 0.1, the output signal becomes 1 * 0.9 to 0.9, and the input signal of node 3 becomes 0.99.0.0 to 0.09. Is 0.9 * 0.9 which is 0.81. In this way, the input signal of the node 9 becomes 0.5314 * 0.1 to 0.05314, the output signal is 0.5314 * 0.9 to 0.4783, and the input signal of the node 10 is 0.4783 * 0.1 to 0.04783.

In other words, the more nodes are connected, the more the I / O signal attenuates. Therefore, in order to improve this point, the present invention obtains the effect that the connection between the devices is connected 1: 1 by connecting the nodes in the daisy chain method (bus method) as shown in FIG.

For example, as shown in FIG. 4, an optical signal transmitted from an arbitrary node is converted into an electrical signal in the first pre-converter to be a reception signal RXD, and the received signal is converted into the third pre-converter again. It converts the optical signal and transmits it to another node.

In addition, the signal transmitted from another node is converted into an electrical signal by the fourth photoelectric converter, and the resultant signal is logically summed with its own transmission signal TXD as OR-Gate. The second photoelectric converter converts the optical signal to the serial gateway or another node.

This stabilizes data transmission even when multiple nodes are connected.

As described above, the present invention can eliminate the electric magnetic induction by connecting a serial gateway and a node with an optical fiber, connecting the node and another node with an optical fiber, and connecting the nodes in a daisy chain manner in a LoneWorks network. It is possible to prevent the loss of data, thereby improving the reliability.

In addition, by connecting the nodes and the nodes by the optical fiber in the daisy chain method, the stub length restriction can be eliminated, thereby ensuring the reliability of data even when the LoneWorks network media and the node are far apart.

Claims (4)

In a LonWorks network using commercially available communication protocols, The data transmitted from the node connected to the ronworks network media 100 is converted into an optical signal and transmitted to the node connected to the optical fiber 400, and the optical signal transmitted from the node is converted to a ronworks signal to convert the data into the ronworks network media ( A serial gateway 200 which transmits to the node connected to 100; Photoelectric conversion and processing unit for converting the optical signal transmitted from the serial gateway 200 to an electrical signal and processing, and converts the electrical signal back to an optical signal to transmit to another node 500 connected to the optical fiber Ronworks network signal converter, characterized in that consisting of (300). The method according to claim 1, wherein the serial gateway 200, The LoneWorks transceiver 201 interfaces with the LoneWorks data transmitted from the node connected to the Loneworks network media 100 and the Loneworks data obtained from the Loneworks transceiver 201 according to the control signal generated by the control logic 202. The neuron chip 203 is stored in the port RAM 206, and the data obtained from the dual port RAM 206 is transferred to the RonWorks transceiver 201, and an operating clock of the neuron chip 203 is generated and processed. A control logic 204 for generating a control signal relating to the ROM, a ROM 204 in which a program related to data processing of the neuron chip 203 is embedded, and a data for temporarily storing the data processed by the neuron chip 203. RAM 205, dual port RAM 206 for storing data transferred from the neuron chip 203 and data transferred from the microprocessor 206, and a program stored in the ROM 209, respectively. It operates according to the RAM and polls the dual port RAM 206 at regular intervals, reads the stored data, transfers the stored data to the serial / parallel data converter 213, and transfers the data transferred from the serial / parallel data converter 213. A microprocessor 208 for storing the dual port RAM 206, a RAM 210 for temporarily storing data processed by the microprocessor 208, a data transmission rate, a parity bit presence, and a stop bit length. A dip switch 211 for setting the controller, a control logic 212 for generating a clock for the microprocessor 208 to operate, and parallel data transmitted from the microprocessor 208 to serial data The serial / parallel data converter 213 performs inverse transform, and the data transmitted from the serial / parallel data converter 213 is converted into an optical signal, and the inverse transform thereof is performed. The light-LonWorks network signal converter, characterized in that consisting of before conversion unit 214. The The method of claim 1, wherein the photoelectric conversion and processing unit 300, A first pre-op converter 301 for converting the optical signal transmitted from the serial gateway 200 into an electrical signal and serial data obtained by the first pre-op converter 301 into parallel data A serial / parallel converter 302, a microprocessor 303 for processing data transmitted from the serial / parallel converter 302 according to a clock generated by the control logic 304, and the first optical signal. The electrical signal obtained from the former conversion unit 302 is converted into an optical signal and transmitted to another node 500 connected to the optical fiber 400, and converts the optical signal transmitted from the node 500 into an electrical signal Lonworks network signal converter, characterized in that consisting of a second photoelectric-electric conversion unit (307). The method according to claim 1, wherein when a plurality of nodes are connected by optical fiber, data communication between each node and the node, The optical signal received by one's node is converted into an electrical signal, processed, and the electrical signal is converted into an optical signal and transmitted to another node. The optical signal transmitted from another node is converted into an electrical signal. And a data transmission and reception device according to a daisy chain method that performs logical OR with its own transmission data and converts the data into an optical signal.

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