JP6350735B2 - Steel plant alarm management equipment - Google Patents

Description

  The present invention relates to a steel plant alarm management device.

  Alarm management is the process of engineering, monitoring and managing alarms in order to realize safe and reliable plant operation. Alarm management plays an important role for operators to detect plant abnormalities at an early stage and take corrective actions.

  In recent years, with the increase in plant accidents, revisions to laws and regulations for plant safety and new guidelines have been established, and guidelines for alarm management have been published, including EEMUA191 issued by the UK EEMUA (Engineering Equipment and Material Users Association). Has been.

  In the above guidelines, requirements and recommendations for the alarm management life cycle have been formulated, alarm system, alarm system, alarm identification, rationalization, design, implementation, operation, maintenance, monitoring and evaluation, change management alarm system It is defined as the management life cycle. As you can see, alarm management focuses not only on the introduction and configuration of high-performance alarm systems and temporary alarm rationalization activities, but also on how to manage and maintain the alarm system. . The basic idea is to convey significant information to the operator in an easy-to-understand manner and rationalize alarms.

  Steel plants having an information network and a control network with different transmission methods are known. The alarm of the computer that manages the manufacturing process is output to the information network. The alarm of the controller that controls the device based on the setting information of the computer is output to the control network. These alarms with different formats are collected separately. The operator can know whether or not the system is operating normally by looking at the alarm list displayed on the display installed in the factory.

  Among these alarms, there are various types of alarms, such as an alarm indicating a sensor abnormality, an alarm indicating any abnormality of the system, an alarm indicating a deviation in coil position information, and a debug sentence. For this reason, the number of alarm messages to be implemented based on the alarm specifications reaches several hundred in one process, and it takes an enormous amount of time to implement the alarm. In addition, a large number of alarms occur in a short time, and it takes time to analyze the alarms. Japanese Patent Application Laid-Open No. 7-200478 describes a method for automatically generating alarms in a common format.

Japanese Patent Laid-Open No. 7-200288

  The device disclosed in Patent Document 1 automates the alarm information creation process of a computer so as to shorten the creation time, but does not manage the alarm after the occurrence. Moreover, only alarm information of the computer is collected, and alarm information output from the controller of the control network is managed separately. When the alarm management is to be realized, if the collected alarm information has a different format, complicated processing is required when accumulating, searching, and statistics of the alarm. For example, when a list of alarms generated at the same time for the entire plant is displayed, if the alarms are stored in a plurality of locations in different formats, data processing becomes complicated. Therefore, in order to realize alarm management, it is desirable that alarm information output in different formats on a plurality of different networks in the plant can be stored together in a common format.

  The present invention has been made to solve the above-described problems, and provides a steel plant alarm management apparatus capable of storing alarm information output in different formats in different networks in a plant in a common format. For the purpose.

1st invention is the steel plant alarm management apparatus connected to the information network and the control network in order to achieve said objective,
The information network is connected to a computer that manages the manufacturing process of the steel plant,
The computer, when an abnormality occurs, computer alarm information including the time of occurrence, importance, generated facility name, display message, to the steel plant alarm management device,
The control network includes a plurality of nodes including at least a first node, a second node, and a third node;
The first node includes the computer, the second node includes a controller that controls equipment of the steel plant, and the third node includes the steel plant alarm management device,
Each node of the plurality of nodes has a common memory, and each common memory is assigned a storage area for storing a state of an alarm symbol determined for each abnormality content,
Each node of the plurality of nodes synchronizes data on the common memory by periodically broadcasting data on the common memory managed by the node to other nodes,
When an abnormality occurs, the controller changes the alarm symbol state on the common memory of the second node to an ON state,
The steel plant alarm management device includes a monitoring unit, a collecting unit, and a storage unit,
The monitoring unit periodically monitors the state of the alarm symbol on the common memory of the third node;
The collector is
For the ON state alarm symbol detected by the monitoring unit, the importance level and occurrence corresponding to the ON state alarm symbol from the alarm definition table in which the relationship between the alarm symbol, the importance level, the name of the generating facility, and the display message are predefined. Get the equipment name and display message,
Collecting controller alarm information including the occurrence time, which is the time when the ON state alarm symbol is detected, the acquired importance, the name of the generated facility, and a display message;
The storage unit extracts alarm information from the controller alarm information and the computer alarm information in a common format including an occurrence time, an importance level, an occurrence facility name, and a display message, and stores the extracted alarm information. And

The second invention is the first invention, wherein
The steel plant includes a rolling line in which a plurality of facilities acting on the rolled material to be conveyed is arranged,
The storage unit stores inventory information that associates the rolled material number of the rolled material and the inventory period in which the rolled material was present in each facility of the plurality of facilities,
The steel plant alarm management device acquires a stock period corresponding to a specified rolling material number and facility name from the stock information stored in the storage unit, and obtains from the alarm information stored in the storage unit It further comprises an alarm statistics unit that counts the number of alarms generated during the stock period.

  According to the first invention, alarm information output in different formats on different networks in the plant can be collectively stored in a common format. Since the alarm information of the entire plant can be stored together, it is easy to use the alarm information of the entire plant. This contributes to shortening the time for identification and analysis of the cause of occurrence, and in turn contributes to suitable alarm management for the entire plant.

  According to the second aspect of the invention, the number of alarm occurrences that occurred during the loading period, which is the period during which the rolled material is loaded in the facility, can be tabulated. Thereby, the statistical information which linked | related rolled material number and alarm information can be provided.

It is a conceptual diagram which shows the whole structure of the system which concerns on Embodiment 1 of this invention. It is a conceptual diagram which shows the rolling line with which the steel plant 1 is provided. 3 is a diagram for explaining scan transmission in a control network 3. FIG. It is a figure which shows an example of the alarm information stored in the alarm information storage table of the accumulation | storage part 63. FIG. It is a figure which shows an example of the information stored in the alarm factor corresponding | compatible definition table. It is a figure which shows an example of a stock information definition table. It is a flowchart showing the flow of a process until the alarm which the controllers 51 and 52 output to the control network 3 is stored in a database. It is a flowchart showing the flow of a process until the computer alarm information which the computer 4 output to the information network 2 is stored in a database. It is a flowchart showing the flow of a process which registers registration information into an alarm factor correspondence definition table. It is a flowchart showing the flow of a process of an automatic alarm suppression function.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
[System Configuration of Embodiment 1]
FIG. 1 is a conceptual diagram showing an overall configuration of a system according to Embodiment 1 of the present invention. The system of FIG. 1 includes a steel plant 1. The steel plant 1 includes two networks having different transmission methods, that is, an information network 2 and a control network 3.

  The steel plant 1 in FIG. 1 includes a computer 4, a controller 51, a controller 52, a steel plant alarm management device 6, and an operator operation terminal 7. The controller 51 and the controller 52 are connected to a plurality of devices. Specifically, for example, the controller 51 is connected to the driving device and electric motor 71 and the sensor 81. Similarly, the controller 52 is connected to the driving device and electric motor 72 and the sensor 82. The driving device and the electric motors 71 and 72 are devices for driving, for example, a roller provided in the rough rolling mill 101 in FIG. 2 and a water injection device provided in a run-out table (ROT) 104. The sensors 81 and 82 are, for example, the stock sensors 110 to 117 in FIG. 2 and temperature sensors (not shown) provided on the exit side of the nth finishing rolling mill 103.

(Rolling line)
FIG. 2 is a conceptual diagram showing a rolling line provided in the steel plant 1. The rolling line in FIG. 2 is a hot rolling line. The rolling line may be a thick plate rolling line, a cold rolling line, a wire rod rolling line, or a bar rolling line.

  The rolled material is heated, rolled and cooled in the process of being conveyed from the heating furnace 100 to the winder 105 on the conveying table 107 of the rolling line. In the rolling line of FIG. 2, a heating furnace 100, a rough rolling mill 101, n finishing rolling mills, an ROT 104, a winder 105, and a coil conveyor 106 are arranged in this order from the upstream. FIG. 2 shows a first finishing mill 102 and an nth finishing rolling mill 103 among n finishing rolling mills.

  The rolling line is divided into a plurality of facilities. FIG. 2 shows a facility F including the heating furnace 100, a facility RM including the rough rolling mill 101, a facility F1 including the first finishing mill 102, and a facility Fn including the nth finishing rolling mill 103. On the entry side of each facility, stock sensors 110 to 117 for detecting that the rolled material has been conveyed to the facility are provided.

  The rolled material (slab) extracted from the heating furnace 100 undergoes rolling by the rough rolling mill 101, rolling by the first finishing rolling mill 102 and the nth finishing rolling mill 103, and cooling by the ROT 104, and the winding machine 105 forms a coil. It is wound up. The rolled material (coil) wound up is conveyed to a downstream process by the coil conveyor 106 after being bundled or weighed.

(Information network and control network)
An information network 2 in FIG. 1 is a network related to operations and product manufacturing, and is a network capable of transmitting and receiving messages between devices connected to the network.

  The control network 3 in FIG. 1 is a plant control network that realizes high reliability and real-time performance. Specifically, the control network 3 is a network that can ensure the simultaneity of control data by scan transmission (periodic broadcast transmission) using a common memory system. As an example of a transmission technology that realizes the control network 3, TCnet (IEC (International Electrotechnical Commission) standard “IEC 617841/1 / IEC 61158”) can be cited.

  The control network 3 in FIG. 1 includes a plurality of nodes (node A31 to node D34). Nodes are also referred to as stations. The node A31 includes the computer 4, the node B32 includes the controller 51, the node C33 includes the controller 52, and the node D34 includes the steel plant alarm management device 6.

  FIG. 3 is a diagram for explaining scan transmission in the control network 3. As shown in FIG. 3, the plurality of nodes A31 to D34 have common memories 310 to 340 having the same configuration. In each common memory, a storage area in which setting information by the computer 4 is written, a storage area in which output data of the controller 51 (including output data of the driving device and the motor 71 and the sensor 81) is written, and output data (driving) of the controller 52 The storage areas in which the device and the output data of the motor 72 and the sensor 82 are written) are assigned so as not to overlap.

  For example, each common memory stores a storage area for storing setting information output from the computer 4 (specifications of rolled material (slab, coil)), and alarm symbol states determined for each failure content of the controllers 51 and 52. A storage area for storing the state of an alarm symbol determined for each failure content of the storage area, the drive device and the motors 71 and 72, and a stock symbol indicating the position of the rolled material output by the sensors 81 and 82 (for example, a stock sensor) The storage areas for storing the states are assigned so as not to overlap. The state of the alarm symbol and the state of the in-stock symbol are stored as bit signals indicating the ON state or the OFF state in the memory space corresponding to the symbol name.

  Each node has a broadcast transmission function for periodically broadcasting data on the common memory managed by the node to all other nodes. For example, the node B32 periodically broadcasts the data in the storage area where the output data of the controller 51 on the common memory 320 is written to all other nodes, and synchronizes the data on each common memory. . The control network 3 can perform scan transmission with a period of several msec.

  Returning to FIG. The computer 4 is connected to the information network 2 and is connected to the control network 3 via the node A31. The controller 51 is connected to the control network 3 via the node B32. The controller 52 is connected to the control network 3 via the node C33. The steel plant alarm management device 6 is connected to the information network 2 and is connected to the control network 3 via the node D34.

(calculator)
The computer 4 is a process computer that comprehensively manages the manufacturing process in the steel plant 1. For example, the computer 4 performs setting calculation for plant control using a physical model simulating a rolling phenomenon. The setting calculation result (setting information) is sent to the controllers 51 and 52 via the control network 3. In addition, when an abnormality occurs, the computer 4 transmits computer alarm information including the time of occurrence, the importance, the name of the generated facility, and a display message to the steel plant alarm management device 6 via the information network 2.

(controller)
The controllers 51 and 52 control each device using the setting information of the computer 4. In addition, when an abnormality occurs, the controllers 51 and 52 change the state of the alarm symbol on the common memory of the node B 32 to the ON state.

(Steel plant alarm management equipment hardware)
Next, the configuration of the steel plant alarm management device 6 will be described. The steel plant alarm management device 6 includes hardware resources such as a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), a hard disk, and a communication interface. The CPU is a device that executes a given instruction (including a program that is a set of instructions) to perform calculation or processing of information. The ROM is a read-only memory that stores data or programs in a nonvolatile manner. The RAM is a readable / writable memory for storing data or programs in a volatile manner, that is, temporarily. These ROM and RAM are main storage devices that are directly accessible from the CPU. A hard disk (hard disk drive) is an auxiliary storage device that is not directly accessible from the CPU. The hard disk can store data or programs in a nonvolatile manner. The communication interface is hardware necessary when the steel plant alarm management device 6 communicates with the outside. These CPU, ROM, RAM, hard disk and communication interface are connected to each other via a bus or a connection cable so that information can be exchanged.

  The ROM of the computer constituting the steel plant alarm management device 6 stores in advance a program for operating the computer configured as described above as the steel plant alarm management device 6. The CPU first reads the program from the ROM and stores the program in a format that can be executed in the RAM. The CPU executes the program stored in the RAM while reading it.

  In this way, when the software program is read into the computer, the calculation or processing of the information is realized by specific means in which the software and hardware resources cooperate with each other as shown in FIG. A steel plant alarm management device 6 having a function is constructed.

(Functions of each part of steel plant alarm management system)
The steel plant alarm management device 6 of FIG. 1 includes a symbol monitoring unit 61, a collecting unit 62, a storage unit 63, an alarm search unit 64, an alarm registration unit 65, an alarm statistics unit 66, an alarm suppression unit 67, and a screen display unit 68. .

  The symbol monitoring unit 61 monitors the state of symbols (alarm symbols and in-stock symbols) on the common memory 340 included in the node D34 at the same transmission cycle as that of the scan transmission described above. When the symbol monitoring unit 61 detects the ON state of the symbol, the symbol monitoring unit 61 sends the symbol name and the detection time (corresponding to the generation time) to the collection unit 62.

  The collection unit 62 has an alarm definition table. The alarm definition table is a table that defines the relationship between the alarm symbol name, the importance level, the name of the generating facility, and the display message. The storage unit 63 may include an alarm definition table, and the collection unit 62 may acquire this. For the alarm symbol (ON state alarm symbol) in which the ON state is detected, the collection unit 62 acquires the importance level, the generation facility name, and the display message corresponding to the alarm symbol name from the alarm definition table. The collection unit 62 collects, as controller alarm information, information including the occurrence time that is the time when the ON state alarm symbol is detected, the acquired importance level, the generated facility name, and the display message. The controller alarm information may include other information (for example, a symbol name).

  The collection unit 62 collects computer alarm information transmitted from the computer 4 via the information network 2.

  The storage unit 63 extracts the alarm information from the controller alarm information and the computer alarm information collected by the collection unit 62 according to a common format including the time of occurrence, the importance, the name of the generated facility, and the display message, and stores the extracted alarm information. . Specifically, the storage unit 63 includes a database (DB) and stores alarm information in a common table (alarm information storage table) in which at least an occurrence time, an importance level, an occurrence facility name, and a display message are defined as fields. Store for the period.

  By using the common format, alarm information of the computer 4 and the controllers 51 and 52 collected from networks with different transmission methods can be stored in one common table. By storing the alarm information of the entire plant in one common table, the alarm information of the entire plant can be easily used, and the alarm management of the entire plant becomes possible.

  FIG. 4 is a diagram illustrating an example of alarm information stored in the alarm information storage table of the storage unit 63. The common format of alarm information includes the date and time of occurrence, importance level, name of the equipment to be generated, and display message as basic items, and is designed so that items can be added depending on the application line and equipment. In FIG. 4, a symbol name is added. By accumulating alarms in a common format, it is possible to collect alarm information generated from devices from different networks and different manufacturers and vendors.

  Preferably, the database of the storage unit 63 further includes an alarm factor correspondence definition table. The alarm factor correspondence definition table is a table that defines the relationship between symbol names, occurrence factors, countermeasures, and alarms (symbol names) that have a strong relationship. FIG. 5 is a diagram illustrating an example of information stored in the alarm factor correspondence definition table. The alarm factor correspondence definition table is a table that defines the relationship between a symbol name, one or more occurrence factors, a strongly related alarm, and a response method. The alarm information storage table in FIG. 4 and the alarm factor correspondence definition table in FIG. 5 have symbol names as common fields. Therefore, it is possible to associate an occurrence factor and a response method with the alarm information searched by the operator.

  Preferably, the collection unit 62 has a stock information definition table. The inventory information definition table is a table that defines the relationship among equipment names, inventory symbol names, and coil numbers (rolled material numbers). The storage unit 63 may include a stock information definition table, and the collection unit 62 may acquire this. The stock symbol on the equipment entry side corresponds to the stock sensor arranged on the entrance side of the equipment, and the stock symbol on the equipment exit side corresponds to the stock sensor arranged on the exit side of the equipment. The state of the stock symbol is changed to the ON state when the stock sensors arranged on the entry side and the exit side of each facility detect the rolled material.

  FIG. 6 is a diagram illustrating an example of a stock information definition table. The inventory information definition table includes at least an equipment name, inventory symbol name (start symbol and end symbol), and coil number as fields. The state of the in-stock symbol (start symbol) RM_FON on the equipment F entry side is ON when the in-stock sensor 110 detects the rolled material. The state of the in-stock symbol (start symbol) RM_RMON on the equipment RM entry side is ON when the in-stock sensor 111 detects the rolled material. The state of the in-stock symbol (start symbol) FME_F1ON on the equipment F1 entry side is ON when the in-stock sensor 112 detects the rolled material. As shown in FIG. 6, by setting the end symbol of the previous equipment to the same symbol as the start symbol of the next equipment, the in-stock sensor on the equipment delivery side can be omitted.

  For the in-stock symbol in which the ON state is detected (ON-state in-stock symbol), the collection unit 62, based on the in-stock information definition table, the detection time when the on-state in-stock symbol is detected, the coil Collect as inventory information in association with the number. The coil number is included in the setting information output by the computer 4 and can be acquired from the common memory.

  The accumulation unit 63 stores the inventory information collected by the collection unit 62 in the inventory information storage table of the database for a predetermined period. The inventory information storage table is a table in which at least an equipment name, a start symbol detection time, an end symbol detection time, and a coil number are defined as fields. From the period from the start symbol detection time to the end symbol detection time, the inventory period during which the coil stays in the facility can be calculated. By using the inventory period, the number of alarms generated during the inventory period can be tabulated from the alarm information storage table.

  The alarm search unit 64 searches the alarm information stored in the database of the storage unit 63 based on the search conditions (keyword, category, importance) input by the operator. The alarm search unit 64 acquires search conditions input by the operator via the screen display unit 68 and acquires search results corresponding to the search conditions from the database of the storage unit 63. The search result is sent to the screen display unit 68. As described above, the alarm information storage table in FIG. 4 and the alarm factor correspondence definition table in FIG. 5 have symbol names as common fields. For this reason, the search result includes information in which the cause and the response method are associated with the alarm information.

  The alarm registration unit 65 registers alarm symbol names, generation factors, closely related alarms, and response methods in the alarm factor correspondence definition table of the storage unit 63. The alarm registration unit 65 acquires registration information input by the operator via the screen display unit 68 and stores it in the alarm factor correspondence definition table of the storage unit 63.

  The alarm statistics unit 66 counts the number of alarms generated per unit time in the storage unit 63 and the number of alarms generated for each coil and each facility. The alarm statistics unit 66 obtains the coil stock period corresponding to the equipment name and coil number from the stock information storage table, and searches the alarm information storage table using the stock period to generate the stock period. It is possible to count the number of alarm occurrences for each facility and each coil. Thereby, the statistical information which linked | related the coil number and alarm information can be provided.

  The alarm suppression unit 67 switches display / non-display of an alarm by designating an event condition, an occurrence time, the number of occurrences, and the like. The alarm suppression unit 67 switches the display of alarms manually or automatically. In manual alarm display switching, the operator can switch display / non-display for each alarm via the operator operation terminal 7. Thereby, it is possible to narrow down and display important alarms from a large number of alarms.

  The screen display unit 68 is a user interface of the alarm search unit 64, the alarm registration unit 65, the alarm statistics unit 66, and the alarm suppression unit 67, and displays the operation screen of each unit on the operator operation terminal 7. The screen display unit 68 causes the operator operation terminal 7 to display an alarm search screen, an alarm registration screen, an alarm statistics screen, and an alarm suppression screen. In addition, the screen display unit 68 transmits the screen operation information input by the operator to the operator operation terminal 7 to the alarm search unit 64, the alarm registration unit 65, the alarm statistics unit 66, and the alarm suppression unit 67, and the processing results in each unit. It is displayed on the operator operation terminal 7.

  The alarm search screen is a screen for searching for alarms by keyword, category, and importance. The alarm registration screen is a screen for registering an alarm generation factor, a strongly related alarm, and a response method in a database. The alarm statistics screen is a screen for displaying a graph of the number of alarm occurrences per unit time, for each coil, and for each equipment. The alarm suppression screen is a screen for switching display / non-display of an alarm by designating an event condition, an occurrence time, an occurrence count, and the like.

  Next, the processing until the controller alarm information and the computer alarm information are stored in the common table (alarm information storage table) on the database will be described with reference to FIGS.

(Flowchart 1)
FIG. 7 is a flowchart showing the flow of processing until the alarm output from the controllers 51 and 52 to the control network 3 is stored in the database. As described above, the symbol monitoring unit 61 periodically monitors the bit signal indicating the state of each symbol in the common memory 340.

  When the symbol monitoring unit 61 detects that the bit signal of the alarm symbol is turned on, the symbol monitoring unit 61 sends the symbol name and the detection time (corresponding to the generation time) to the collection unit 62 (step S100).

  The collection unit 62 determines whether or not the symbol name is a symbol name registered in the above-described alarm definition table (step S102).

  When the symbol name is registered in the alarm definition table, the collection unit 62 acquires the importance level, the generation facility name, and the display message corresponding to the symbol name from the alarm definition table. The collection unit 62 collects the symbol name, generation time, importance, generation facility name, and display message as controller alarm information. The collection unit 62 sends the controller alarm information to the storage unit 63.

  The storage unit 63 extracts alarm information according to a common format including the symbol name, occurrence time, importance, generation facility name, and display message as items (step S104). The accumulation unit 63 stores the extracted alarm information in the database (step S106). Specifically, the storage unit 63 stores the alarm information in the common table (alarm information storage table) described above for a predetermined period.

(Flowchart 2)
FIG. 8 is a flowchart showing the flow of processing until the computer alarm information output from the computer 4 to the information network 2 is stored in the database. The collection unit 62 receives computer alarm information (step S200). The collection unit 62 sends computer alarm information to the storage unit 63. The storage unit 63 extracts alarm information from the computer alarm information according to the common format described above (step S202). The accumulation unit 63 stores the extracted alarm information in the database (step S204). Specifically, the storage unit 63 stores the alarm information in the common table (alarm information storage table) described above for a predetermined period.

  As described with reference to FIGS. 7 and 8, this system can extract alarm information from the controller alarm information and computer alarm information according to a common format, and store the extracted alarm information in a common table. Alarm information output in different formats on different networks in the plant can be stored together in a common format, and suitable data storage for alarm management is realized.

(Flowchart 3)
FIG. 9 is a flowchart showing the flow of processing for registering registration information in the alarm factor correspondence definition table. The operator selects a target alarm from the list of generated alarms displayed on the operator operation terminal 7 (step S300). The operator operation terminal 7 makes an inquiry to the steel plant alarm management device 6, and if registration information has been registered in the alarm factor correspondence definition table in the past, the registration information related to the symbol name of the target alarm from the alarm factor correspondence definition table. Is acquired and displayed on the screen (step S302). The operator selects whether or not to newly register registration information (step S304). When registering, an alarm registration screen is displayed (step S306). The operator inputs the cause of the target alarm, the closely related alarm, and the response method as registration information on the alarm registration screen (step S308). The storage unit 63 stores the registration information in the alarm factor correspondence definition table of the database (step S310).

  As described with reference to FIG. 9, the present system can define in the alarm factor correspondence definition table the alarm factors that have occurred in the past, alarms that are strongly related, and countermeasures. Further, as described above, the alarm information storage table in FIG. 4 and the alarm factor correspondence definition table in FIG. 5 are related by the symbol name of the alarm. Therefore, according to the present system, when the same or strongly related alarm is generated in the future, it is possible to provide guidance to the operator about the alarm information and the generation factor associated with the alarm information and the response method.

(Flowchart 4)
FIG. 10 is a flowchart showing the flow of processing of the automatic alarm suppression function. It is assumed that automatic alarm suppression is selected on the alarm suppression screen. The alarm suppression unit 67 determines whether or not the display flag set for each alarm on the alarm suppression screen is ON (step S400). The alarm suppression unit 67 determines alarm display / emergency according to a predetermined automatic alarm suppression condition. As an alarm suppression condition, for example, it is determined whether or not an alarm has occurred m times or more per n seconds (step S402), and whether or not a predetermined flag is ON / OFF (step S404). Accordingly, display / non-display is switched (step S406).

As described above, according to the present system, alarms output by the controller on the control network and alarms output by the computer on the information network are collected, and the occurrence time, importance, name of the generated facility, display message, etc. are collected. Can be stored in a database in a common format. In other words, alarm information output in different formats on a plurality of different networks in the plant can be stored together in a common format. Furthermore, by providing the alarm search unit 64, the alarm registration unit 65, the alarm statistics unit 66, and the alarm suppression unit 67, it is possible to perform alarm management and construct an alarm system that is easy for the operator to understand.
Search the alarm information stored in the database, share the cause and response method of the alarm with the operator, calculate the number of alarm occurrences per unit time, coil, and equipment and display the alarm statistics results By doing so, it is possible to perform a PDCA cycle of alarm management instead of a temporary alarm management activity. By showing the alarm generation factor and response method to the operator, it is possible to promptly respond to the alarm occurrence, which can lead to stable operation of the steel plant.

  By the way, in the system of Embodiment 1 mentioned above, the steel plant alarm management apparatus 6 may be comprised by the some computer connected with the network. For example, the symbol monitoring unit 61 and other parts may be configured by separate hardware.

  Moreover, in the steel plant 1 of FIG. 1, the number of computers, the number of controllers, the number of drive devices and motors, and the number of sensors are not limited to the configuration shown in FIG.

  In the system configuration shown in FIG. 1, the drive device / motor 71 and sensor 81 are connected to the node B 32 via the controller 51, but the drive device / motor 71 and sensor 81 are directly connected to the node. May be directly connected to the node. The same applies to the driving device, the motor 72, and the sensor 82.

1 Steel Plant 2 Information Network 3 Control Network 4 Computer 6 Steel Plant Alarm Management Device 7 Operator Operation Terminal 31 Node A
32 Node B
33 Node C
34 Node D
51, 52 Controller 61 Symbol monitoring unit 62 Collection unit 63 Accumulation unit 64 Alarm search unit 65 Alarm registration unit 66 Alarm statistics unit 67 Alarm suppression unit 68 Screen display units 71, 72 Drive device and motor 81, 82 Sensor 100 Heating furnace 101 Coarse Rolling machine 102 1st finishing rolling mill 103 nth finishing rolling mill 105 Winding machine 106 Coil conveyor 107 Transfer table 110-117 Stock sensor 310-340 Common memory

Claims (2)

A steel plant alarm management device connected to an information network and a control network,
The information network is connected to a computer that manages the manufacturing process of the steel plant,
The computer, when an abnormality occurs, computer alarm information including the time of occurrence, importance, generated facility name, display message, to the steel plant alarm management device,
The control network includes a plurality of nodes including at least a first node, a second node, and a third node;
The first node includes the computer, the second node includes a controller that controls equipment of the steel plant, and the third node includes the steel plant alarm management device,
Each node of the plurality of nodes has a common memory, and each common memory is assigned a storage area for storing a state of an alarm symbol determined for each abnormality content,
Each node of the plurality of nodes synchronizes data on the common memory by periodically broadcasting data on the common memory managed by the node to other nodes,
When an abnormality occurs, the controller changes the alarm symbol state on the common memory of the second node to an ON state,
The steel plant alarm management device includes a monitoring unit, a collecting unit, and a storage unit,
The monitoring unit periodically monitors the state of the alarm symbol on the common memory of the third node;
The collector is
For the ON state alarm symbol detected by the monitoring unit, the importance level and occurrence corresponding to the ON state alarm symbol from the alarm definition table in which the relationship between the alarm symbol, the importance level, the name of the generating facility, and the display message are predefined. Get the equipment name and display message,
Collecting controller alarm information including the occurrence time, which is the time when the ON state alarm symbol is detected, the acquired importance, the name of the generated facility, and a display message;
The storage unit extracts alarm information from the controller alarm information and the computer alarm information in a common format including an occurrence time, an importance level, an occurrence facility name, and a display message, and stores the extracted alarm information.
Steel plant alarm management device characterized by. The steel plant includes a rolling line in which a plurality of facilities acting on the rolled material to be conveyed is arranged,
The storage unit stores inventory information that associates the rolled material number of the rolled material and the inventory period in which the rolled material was present in each facility of the plurality of facilities,
The steel plant alarm management device acquires a stock period corresponding to a specified rolling material number and facility name from the stock information stored in the storage unit, and obtains from the alarm information stored in the storage unit An alarm statistic unit that counts the number of alarms that occurred during the
The steel plant alarm management device according to claim 1.

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