KR101102120B1 - Channel diagnostic method in/out modules base on fielbus network and diagnostic information generation device using the same - Google Patents

Abstract

PURPOSE: A channel error diagnosis method of an input/output module and diagnosis information generating apparatus using the same are provided to diagnose the error of an input/output module through a diagnosis unique characteristic file. CONSTITUTION: An input and output interface unit(110) receives diagnosis data including a diagnosis frame from an input/output module. A storing unit(120) stores a diagnosis intrinsic configuration file. A controller(130) compares the received diagnosis data and the diagnosis unique configuration file stored in the storing unit. The controller generates diagnosis information. The diagnosis frame includes a device related diagnosis field, an ID related diagnosis field, and a channel related diagnosis field.

Description

CHANNEL DIAGNOSTIC METHOD IN / OUT MODULES BASE ON FIELBUS NETWORK AND DIAGNOSTIC INFORMATION GENERATION DEVICE USING THE SAME}

The present invention relates to a method for diagnosing a channel failure of an input / output module and a diagnostic information generating device in a fieldbus network. A method for diagnosing a channel failure of an input / output module in a fieldbus network that can be diagnosed, and an apparatus for generating diagnostic information.

PROFIBUS is an open fieldbus that can be independently adopted, applied and manufactured by the manufacturer (Vendor- independence) and widely used in process automation. Vendor independence and open characteristics are specified in European standards EN 50170 and EN 50254. PROFIBUS enables communication without the need for special interfaces when communicating between devices made by different manufacturers.

PROFIBUS has DP and FMS, which are communication protocols by function and application level, and the Physical Profiles applied are RS-485 and IEC 1158-2 or optical communication. In terms of future technological developments, the PROFIBUS User Organization is developing general-purpose protocols based on TCP / IP.

Application Profiles not only define protocols and transmission technologies required for different types of applications, but also how to apply vendor-independent devices.

In general, the frame structure related to the diagnosis function in Pnet is configured by adding a diagnostic block defining a separate protocol according to the manufacturer's hardware features in the main 6 bytes allocated to all slaves in common. If a problem occurs in the analog module itself or a channel, related information can be displayed in the header of each corresponding field. The main controller (master) located in the central control room can analyze the diagnostic frame containing the diagnostic information and analyze the abnormal state of the analog module.

On the other hand, in diagnosing a channel state or various error conditions of a module located in a conventional remote location, it was driven according to the characteristics of each manufacturer. Therefore, even though Profibus-DP is an open protocol, the error status is defined differently for each manufacturer, so it is difficult to be compatible between different manufacturers' modules in the diagnosis function.

In particular, the diagnostic function related to the channel status of the analog input / output module is so confusing that many types of techniques are provided according to the characteristics of the manufacturer.

The present invention has been made to solve the above-described problems, the channel failure of the I / O module in the fieldbus network that can diagnose the failure of the I / O module using a diagnostic unique characteristic file (GSD) provided by the manufacturer of the I / O module It is an object of the present invention to provide a diagnostic method and an apparatus for generating diagnostic information using the method.

In order to solve the above problems, a method for diagnosing a channel failure of an input / output module in a fieldbus network according to an embodiment of the present invention may include performing initialization for data transmission and reception with an input / output module, in the event that a failure occurs in the input / output module, diagnostic data from the input / output module. And receiving the diagnostic data and comparing the received diagnostic data with a diagnostic specific characteristic file GSD stored in a storage unit to analyze the failure to generate diagnostic information.

According to an aspect of an embodiment of the present invention, the diagnostic related frame of the diagnostic data may include a device related diagnostic field, an ID related diagnostic field, and a channel related diagnostic field.

According to one embodiment of the present invention, in the channel-related diagnostic field, the channel failure related data for the input / output module includes a channel ID (1 Byet), the number of channels (1 byte), and the failure status information (1 byte). It features.

According to one embodiment of the present invention, the diagnostic unique characteristic file GSD is characterized in that fault information of the input / output module is defined in Channel_Diag 16 to Channel_Diag 31 according to the manufacturer.

In order to solve the above problems, a diagnostic information generating apparatus according to another embodiment of the present invention includes an input / output interface unit for receiving diagnostic data from an input / output module, and a diagnostic unique characteristic file (GSD) for comparing with the diagnostic data. And a control unit for analyzing the failure and generating diagnostic information by comparing the storage unit and the received diagnostic data with the diagnosis specific characteristic file GSD stored in the storage unit.

According to the present invention as described above, by making each manufacturer compatible only by the operation of the GSD file stored diagnostic code compare the diagnostic information of each manufacturer's analog I / O module with the GSD file, the input and output of each manufacturer easily The advantage is that the module can be diagnosed for faults.

1 is a block diagram of a fieldbus network according to an embodiment of the present invention.
2 is a flowchart illustrating a channel failure diagnosis method of an input / output module in a fieldbus network according to an embodiment of the present invention.
3 is a frame structure diagram of diagnostic data of an input / output module according to an embodiment of the present invention.
4 is an application example of a diagnostic data frame according to an embodiment of the present invention.
5 is another application example of a diagnostic data frame according to one embodiment of the present invention.

The following detailed description is only illustrative, and merely illustrates embodiments of the present invention. In addition, the principles and concepts of the present invention are provided for the purpose of explanation and most useful.

Accordingly, various forms that can be implemented by those of ordinary skill in the art, as well as not intended to provide a detailed structure beyond the basic understanding of the present invention through the drawings.

1 is a block diagram of a fieldbus network according to an embodiment of the present invention.

As shown in FIG. 1, the diagnostic information generating apparatus 100 is connected to at least one input / output module 200 through a fieldbus network, and the diagnostic information generating apparatus 100 is connected to the input / output module 200 through a network. Fault diagnosis information may be transmitted to a monitoring device (not shown). The diagnostic information generating device 100 may be a programmable logic controller (PLC) as a control device for controlling the input / output module.

When power is initially supplied, the diagnostic information generating apparatus 100 performs an initialization process for recognizing one's own information and at least one input / output module 200 connected through a fieldbus network, so that a control command or state is transmitted to the input / output module. Send information request command.

The diagnostic information generating apparatus 100 includes an input / output module 200 and an input / output interface 110 for transmitting and receiving data using a fieldbus protocol (for example, Profibus, etc.), a storage unit 120, and a controller 130. .

The input / output interface 110 includes at least one slot 111 to be connected to at least one input / output module 200 through the slot 111.

The storage unit 120 includes a program for driving a diagnostic information generating apparatus and a diagnostic code in which a diagnostic code is defined according to a failure state set by a manufacturer of each input / output module in order to interpret the diagnostic data received from the input / output module 200. The property file GSD is stored.

The controller 130 controls the entire operation of the diagnostic information generating apparatus and transmits a control command to the input / output module 200 connected through the slot 111 of the input / output interface 110. The control unit 130 receives diagnostic data from the input / output module 200 and compares the diagnostic unique characteristic file GSD stored in the storage unit with the diagnostic data to analyze a failure of the input / output module 200. 131.

Here, the input / output module 200 includes an analog input module, an analog output module, a special input module or a special output module. The analog input module, analog output module, special input module or special output module of the input / output module 200 is connected to at least one external device (not shown) through each channel of a channel terminal unit (not shown) provided therein. . The channel terminal unit may be composed of 2 channels, 4 channels, 8 channels, 16 channels, or 32 channels.

The analog input module receives analog signals input from external devices connected through internal channel terminals and converts them into digital signals.The analog output module converts input digital signals into analog signals to external devices through the channel terminals. It plays a role of outputting. In addition, the special input module or special output module corresponds to a PID control module, a temperature conversion module, a positioning module, and performs a special function.

The input / output module analyzes an error of the analog input module itself or an analog signal of an external device input through each channel, generates diagnostic data including error information of the channel, and transmits the diagnostic data to the diagnostic information generating device. .

2 is a flowchart illustrating a fault diagnosis method of an input / output module in a fieldbus network according to an embodiment of the present invention.

As shown in FIG. 2, when power is initially supplied, the controller 130 performs an initialization process of checking a hardware set state with an input / output module 200 connected thereto (S21). After the initialization process, the input / output module 200 receives an analog signal input from an external device through each channel of the analog input module. When the I / O module does not receive the analog signal received through each channel for more than a certain time (breakdown occurs), when a current larger than the preset reference current value is measured (overcurrent occurs), a failure occurs such as a parameter setting error. In this case, diagnostic data including fault information generated in each channel is generated and transmitted to the diagnostic information generating apparatus (S23).

Thereafter, the diagnostic information generating apparatus that receives the diagnostic data compares the diagnostic intrinsic property file GSD stored in the storage unit (S25) to analyze the failure to generate the diagnostic information (S27).

Hereinafter, a method of defining a frame structure of a diagnostic data generated by an input / output module and a diagnostic peculiar property file GSD according to an embodiment of the present invention will be described.

3 is a frame structure diagram of diagnostic data of an input / output module according to an embodiment of the present invention.

As shown in FIG. 3, a frame of diagnostic data includes a basic information field 310, 6 bytes, which is mandatory, a device related diagnostic field 320, an ID related diagnostic field 330, and a channel related diagnostic field 340. It includes. That is, in a frame structure consisting of a basic information field (6 bytes) and a diagnostic field defined in a fieldbus protocol (here, Profibus), a diagnostic field for describing diagnostic information in consideration of the maximum transmission data size is selected as a basic information field (6 bytes). Defined by extending it up to 238Byte except for). In this case, the diagnostic information defined in all the diagnostic data may be hierarchically configured for the device, the ID, and the channel, as shown in FIG. 3.

4 is an application example of a diagnostic data frame according to an embodiment of the present invention.

As shown in FIG. 4, the diagnostic data generated by the input / output module may include a header 410 and a byte 16, a manufacturer setting field 420 and a byte 17, and a failure state information field Byte 18 to Byte 25.

Here, to indicate that the field is about the state of the input / output module, the most significant two bits of the header 410 and Byte 16 are set to 00 and the lower six bits determine the length of the corresponding field. As shown in FIG. 4, it can be seen that the lower 6 bits are 9, and 9 fields are allocated to indicate failure state information. On the other hand, as an example of the manufacturer setting field (420, Byte 17), if the best bit is 1 and the remaining value is 2, it defines the H state and becomes the fault status information field in the following bytes (Byte 18 to Byte 25). Byte 23 shows that the upper four bits (4 to 7 bits) can write an error code according to the fault condition information, and the diagnostic information generation device receiving the diagnostic data is based on the diagnostic data set for each standard or manufacturer. The diagnostic information of the input / output module can be interpreted by comparing the GSD which defines the fault state.

In this example, the top four bits (4 to 7 bits)

0000: ok,

0001: Diagnostic code 10, Reset Check Error,

0010: Diagnostic Code 11, Ram Check Error,

0011: Diagnostic code 12, Register Check Error,

0100: Diagnostic code 13, EEPROM Check Error,

0101: Can consist of diagnostic code 21, D / A Conversion Error.

5 is another application example of a diagnostic data frame according to one embodiment of the present invention.

As shown in FIG. 5, each channel-related diagnostic field of the input / output module may configure channel failure status information 510, 520, 530 with a total of 3 bytes of channel IDs 511, 521, 531, number of channels 512, 522, 532, and diagnostic codes 513, 523, 533.

In one embodiment, the two most significant bits of the byte 26 (511) represent a diagnostic field, while the lower six bits represent a channel ID of the input / output module. Where channel ID is zero. Next, bits 1 to 4 of Byte 27 (512) represent the number of channels, and in this case, 1000 represents 16. Bits 1 to 4 of Byte 28 (513) represent channel failure status information, which corresponds to diagnostic code 100 as 1000. That is, the diagnostic information generating apparatus may analyze the diagnostic information of the input / output module by comparing the unique characteristic file GSD stored in the storage unit with the diagnostic data.

If the manufacturer wants to provide non-standard fault status information, the diagnostic structure should be defined in the GSD. Here, a manufacturer who wants to provide a unique diagnostic function may define fault information of an input / output module in Channel_Diag (16) to Channel_Diag (31).

One embodiment for defining a diagnostic structure in a manufacturer's unique properties file (GSD) is as follows.

<Channel_Diag>

Channel_Diag (16) = "Parameter assignment error"

Channel_Diag (17) = "Sensor or load voltage missing"

Channel_Diag (18) = "Fuse defect"

Channel_Diag (19) = "Slot not addressable"

Channel_Diag (20) = "Ground error" ~

Channel_Diag (31) = "Reference channel error".

Moudle = "Model Name" Ox43, Ox47, Ox00, Ox15, oxC5

; <Unit_Diag_Area>;

// To know the location of I / O module slot where device level failure occurs

Unit_Diag_Area = 8-11

Value (1) = "Slot 0, I / O 0"

Value (2) = "Slot 1, I / O 1"

Value (3) = "Slot 2, I / O 2"

Value (4) = "Slot 3, I / O 3"

Value (5) = "Slot 4, I / O 4"

Value (6) = "Slot 5, I / O 5"

Unit_Diag_Area_End

; <Unit_Diag_Area>;

// define status information of device level failure

Unit_Diag_Area = 16-20

Value (10) = "Incorrect module installed"

Value (10) = "The module does not exist"

Unit_Diag_Area_End

; <Channel_Diag>

// If diagnostic code 16, disconnection information

Channel_Diag (16) = "Disconnected"

Channel_Diag (17) = "Overcurrent Occurred"

; Ext_User_Prm_Data_Ref (0) = 16

// Define parameter structure using Ext_User_Prm_Data_Ref

End mouth

The diagnostic information generating device generates diagnostic information by analyzing the fault state by comparing the fault state of the I / O module with the diagnosis specific characteristic file (GSD) defined by the manufacturer stored in the storage unit. Can be.

Therefore, by comparing the diagnostic data generated according to the different channel diagnosis function of each manufacturer with the diagnosis specific characteristic file (GSD) defined by the manufacturer, it is possible to diagnose the channel failure of the I / O module in the fieldbus network regardless of the diagnosis function of the I / O module of each manufacturer. can do.

The present invention has been described in detail with reference to exemplary embodiments, but those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention. I will understand.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100: diagnostic information generating device 110: input and output interface
111: slot 120: storage
130: control unit 131: diagnostic information generation unit
200: input / output module

Claims (8)

When a failure occurs in the input / output module, receiving diagnostic data including a predetermined diagnostic frame from the input / output module; And
Comparing the received diagnostic data with a previously stored diagnostic unique characteristic file (GSD) to analyze a failure and generate diagnostic information, wherein the diagnostic frame includes a device related diagnostic field, an ID related diagnostic field, and a channel related diagnosis. A method for diagnosing channel faults in I / O modules in a fieldbus network containing fields.
delete The method of claim 1,
The channel-related diagnostic field includes channel failure status information, and the channel failure status information includes channel ID, number of channels, and failure status information.
The method of claim 1,
The diagnostic intrinsic characteristic file (GSD) defines a diagnosis structure unique to each manufacturer, and the channel failure diagnosis method of the input / output module in the fieldbus network defined in a predetermined diagnosis channel.
An input / output interface unit configured to receive diagnostic data including a predetermined diagnostic frame from the input / output module;
A storage unit for storing a diagnosis-specific characteristic file GSD; And
And a control unit for comparing the received diagnostic data with a diagnostic-specific characteristic file (GSD) stored in the storage unit to analyze a failure and generate diagnostic information, wherein the diagnostic frame includes a device-related diagnostic field, an ID-related diagnostic field, and the like. Diagnostic information generating device including a channel-related diagnostic field.
delete The method of claim 5,
The channel-related diagnostic field includes channel failure status information, and the channel failure status information includes a channel ID, a number of channels, and a failure status information.
The method of claim 5,
The diagnostic intrinsic characteristic file (GSD) defines a diagnosis structure unique to each manufacturer and is defined in a predetermined diagnostic channel.

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