KR200426024Y1 - Computer Link Interface Module with Built-in Protocol Analyzer - Google Patents

Abstract

The present invention relates to a computer link communication module of the PC link communication module, which enables to analyze the communication frame without using a separate protocol analyzer.

The computer link communication module according to the present invention has a RX and a TX and a first port and a second port connected to the outside, respectively, to process communication procedures between the Piel time or the PLS and other communication devices. A communication module, comprising: a mode setting switch for setting one of a communication mode and a protocol analyzer mode; A dip switch installed between the RX of the first port and the TX of the second port and connecting the RX and the TX in the protocol analyzer mode; Connected to each of the RX and TX at the rear end of the first port and the second port, when the protocol analyzer mode, the communication signal of the communication device and the Pel time received through the dip switch corresponding to each mode constant level A first driver and a second driver for converting the signal into an output; And a first SCI in the first port and a second in the second port, connected to rear ends of the first and second drivers, for analyzing a frame of the communication signal of the PEL time with the communication device received through the dip switch. 2 SCI; configured to include.

According to the present invention, the serial communication analyzer function can be implemented without greatly modifying the existing communication module, thereby reducing the production cost of the PLC device.

 Programmable Logic Controller (PLC), Communication Module, Analyzer,

Description

Computer Link Interface Module with Built-in Protocol Analyzer

1A and 1B are diagrams for explaining a PLC system using a conventional computer link communication module.

2 is a view for explaining the internal structure of the communication module performing the RS-232C analyzer function according to an embodiment of the present invention.

3 is a view for explaining the internal structure of a communication module performing an RS-422 / 485 analyzer function according to an embodiment of the present invention.

4 is a flowchart illustrating a process of analyzing a frame of PLC transmission / reception data using a communication module of the present invention.

The present invention relates to a computer link communication module, and more particularly, to a computer link communication module in the computer link communication module of the PLS, which can analyze the communication frame without using a separate protocol analyzer.

In general, the PC link communication module can read / write data using a dedicated protocol based on serial communication.

1A and 1B are diagrams for describing a conventional PSI system. Referring first to FIG. 1A, a conventional PSI system includes a PADT, which is programmed, debugged, and monitored through communication with a PSI. Programming And Debugging Tool) 102; And a computer link communication module 104, which acts as a data interface means between the PID and each measurement device.

In addition, in order to use the PI of such a system configuration, the PD 102 connects to the computer link communication module 104, sets communication conditions, and displays a communication content of the communication module. Monitoring method was used.

In addition, in the case of the serial communication applied to the system receives a variety of undefined data in the form of frames from a variety of MMI and measurement equipment, such communication frame between the communication and each communication device is shown in Figure 1b By connecting and configuring the protocol analyzer 106, the analysis could be performed. More specifically, by connecting a communication line between a communication device and Peltime to the protocol analyzer 106, the frame appears on the display (not shown), and by analyzing the frame shown on the display, The method of diagnosing problems in the communication interface was used.

Of course, it is possible to monitor the transmission / reception frame using the PD 102 for data processed by the PD, such as dedicated communication and mode communication, but the contents are identified using a protocol analyzer for more accurate frame analysis and confirmation. It was the best way to do it.

However, such protocol analyzer equipment is expensive, and since its size also takes up a lot of space, there is a problem in that it is not easy to use when it is installed in a narrow place.

In order to solve this problem, the present invention adds a protocol analyzer function to an existing computer link communication module, thereby providing an apparatus for analyzing a frame without using an expensive protocol analyzer to analyze an interface between communication devices. Its purpose is to provide.

The computer link communication module of the present invention for achieving the above object, the first and second ports having RX and TX, respectively, and connected to the outside for processing the communication procedure between each Piel time or Pielsi and other communication devices A communication module comprising: a mode setting switch for setting any one of a communication mode and a protocol analyzer mode; A dip switch installed between the RX of the first port and the TX of the second port and connecting the RX and the TX in the protocol analyzer mode; Connected to each of the RX and TX at the rear end of the first port and the second port, when the protocol analyzer mode, the communication signal of the communication device and the Pel time received through the dip switch corresponding to each mode constant level A first driver and a second driver for converting the signal into an output; And a first SCI in the first port and a second in the second port, connected to rear ends of the first and second drivers, for analyzing a frame of the communication signal of the PEL time with the communication device received through the dip switch. 2 SCI; configured to include.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 and 3 are views for explaining the internal structure of the communication module performing the RS-232C analyzer function and the RS-422 / 485 analyzer function, respectively, according to an embodiment of the present invention.

The communication module according to the embodiment of the present invention includes a dip switch 206A for RS-232C communication and a dip switch 206B for RS-422 / 485 communication.

The dip switches 206A and 206B are used for connecting or disconnecting signals between the lines connected to the port 1 202A and 202B and the two lines connected to the port 2 204A and 204B.

That is, the communication module according to the present invention includes a mode setting switch (not shown) for selecting a communication mode and a protocol analyzer mode, and when the protocol analyzer mode is set, the communication module is connected by the dip switches 206A and 206B. One serial communication interface (SCI) 212A and 212B and a second SCI 214A and 214B are configured to be used simultaneously.

In addition, in order to receive both transmit and receive signals when communicating with an external communication device, external receive data is transmitted to the RX receiving end of the port 1 (202A, 202B) and sent to the RX receiving end of the port 2 (204A, 204B). Receives external transmission data.

For reference, in the drawing, the TX line means a transmission line and a transmission signal transmitted by it, and the RX line shows a reception line and a reception signal transmitted by the same.

The first driver 208A, 208B in the first port 202A, 202B and the second driver 210A, 210B in the second port 204A, 204B may be used to determine whether the communication module of the present invention is in communication mode or protocol analyzer mode. After the determination, the communication signal received through the dip switches 206A and 206B and the PEL time communication signal are converted into a predetermined communication level corresponding to the mode and outputted.

SCI (212A, 212B, 214A, 214B) performs the operation of analyzing the frame of the communication signal of the communication device and the PEL time received through the dip switch (206A, 206B), in particular the communication module according to the present invention is an analyzer In order to perform the function, the SCI is included in the first and second ports, respectively, and should be used simultaneously according to the operation control of the CPU (not shown).

4 is a flowchart illustrating a process of analyzing a frame of PLC transmission / reception data using a communication module of the present invention.

The mode setting switch allows the communication module to switch to protocol analyzer mode.

At this time, the frame of the communication signal between the communication device and the Pel time received through the dip switch is transmitted to the SCI, the analysis of the frame is performed in the SCI (S402, S404).

The analyzed frame is transmitted to the communication buffer of the PI (S406).

The communication buffer stores the analyzed data of the frame in the receiving order, and then sequentially transmits the data to the memory area of the CPU (S408).

The data stored in the memory area of the CPU is sequentially displayed through the display unit of the PID connected to the PSI (S410).

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention belongs may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

As described above, according to the computer link communication module of the present invention, the serial communication analyzer function can be implemented without greatly modifying the existing communication module, thereby reducing the production cost of the PLC device.

Claims (2)

delete In the communication module having RX and TX, and the first and second ports connected to the outside, respectively, to process the communication procedure between each PI time or the other communication device, A mode setting switch for setting any one of a communication mode and a protocol analyzer mode; A dip switch installed between the RX of the first port and the TX of the second port and connecting the RX and the TX in the protocol analyzer mode; Connected to each of the RX and TX at the rear end of the first port and the second port, when the protocol analyzer mode, the communication signal of the communication device and the Pel time received through the dip switch corresponding to each mode constant level A first driver and a second driver for converting the signal into an output; And A first SCI in the first port and a second in the second port, connected to the rear ends of the first and second drivers, for analyzing a frame of the communication signal of the PEL time with the communication device received through the dip switch; SCI; computer link communication module comprising a.

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