JPWO2007086113A1 - Plant control system - Google Patents

Abstract

Program editing means 10 for creating a control program including interlock conditions and interlock diagnosis, plant control means CONT1 for executing a program object in the control program, and a plurality of plant controls having functions equivalent to the plant control means CONT1 Means CONT2, CONT3,..., CONTn, a logic operation unit, and a display unit, and updates and displays the establishment / non-establishment or the latest latest non-establishment time of the interlock condition at a predetermined time before the current time. Even if the circuit is formed in multiple stages, only the cause of failure is identified, and the interlock diagnosis means 20 that automatically displays in graphical language and the operator operation / display device HMI operated by the plant operator are provided. Operator operation / display device equivalent to the interlock diagnosis means 20 Plant control system which gave the ability.

Description

  The present invention relates to a plant control system, and more particularly to an apparatus for creating, displaying, and diagnosing a plant control program.

  Generally, when constructing a plant control system, a system programmer creates, tests, and adjusts a program for automatically operating a plant as a control program for a plant control apparatus, and then provides the program to the plant operator.

  Here, in order to control the plant safely, the system programmer must equip the control program with start conditions and operation interlock conditions (apparatus operation permission conditions) such as a rotating machine. Whether or not the interlock condition is satisfied is a matter of course for the plant operator, and it is required to present it to the plant operator in an easily understandable manner.

  Conventionally, when the plant equipment is stopped, the establishment / non-establishment of the interlock condition at a predetermined time before the present is updated and displayed, and even if the interlock circuit is formed in multiple stages, only the non-established source factor is specified. A plant system control system having interlock diagnosis means for automatically displaying in a graphical language has been proposed (see Japanese Patent Application No. 2004-201978).

In addition, to support plant operators, the establishment / non-establishment of the interlock condition is updated, and even if the interlock circuit is formed in multiple stages, only the non-established source factor variable is identified and automatically displayed in the diagram language. Proposed a plant control system that allows the display function to be operated on a general operator display device and easily detects an unsatisfied interlock condition among a large number of interlock conditions by a hierarchical display procedure. Has been.

However, the conventional plant control system has the following drawbacks.
(a) Interlock diagnosis that updates the establishment / non-establishment of the interlock condition, identifies only the non-established source factor even if multiple interlock circuits are formed, and automatically displays it in the graphical language The function is performed only for the interlock circuit of one plant control means.
Therefore, when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlocks that construct the representative contacts by other plant control means It is not possible to monitor whether the condition is met or not.
(b) Interlock diagnosis that updates the establishment / non-establishment of the interlock condition and identifies only the non-established source factor even if multiple interlock circuits are formed, and automatically displays it in a graphical language The function detects the first contact failure and presents it on the interlock diagnosis screen. Then, the second, third,..., Nth non-established contact cannot be detected.

The present invention has been made in consideration of the above points.
1) Even if the interlock condition used by any plant control means is interfaced as a representative contact from another plant control means connected to the network, the individual interface that constructs the representative contact by other plant control means By monitoring the state of establishment / non-establishment of the lock condition, the function of displaying on the interlock diagnosis screen as one of the source factor contacts where the individual interlock condition in other plant control means is not established,
2) Even if the interlock circuit is formed in a plurality of stages, only the non-established source flow source contact is specified, and the first non-established contact is detected and displayed on the interlock diagnosis screen. A function to detect the third, third,..., Nth non-established contact and display it on the interlock diagnosis screen;
It aims at providing the plant control system which has.

In order to achieve the above object, in the present invention,
Control program editing means for creating a control program including interlock conditions and interlock diagnosis;
A plurality of plant control means for executing program objects in the control program;
It has a logic operation unit and a display unit, and updates and displays the establishment / non-establishment of the interlock condition at a predetermined time before the present in any plant control means, and even if multiple stages of interlock circuits are formed, the source of the failure In addition to the function that identifies only the factor contact and automatically displays the interlock diagnosis screen in the graphical language,
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means The function of displaying on the interlock diagnosis screen as one of the source flow factor contacts in which the individual interlock conditions in other plant control means are also not established by monitoring the establishment / non-establishment state of
In addition to the function of identifying only the non-established source flow source contact even if the interlock circuit is formed in a plurality of stages, detecting the first non-established contact, and displaying it on the interlock diagnosis screen, the second, An interlock diagnosis means having a function of detecting a third, ..., nth non-established contact and displaying it on the interlock diagnosis screen;
Operator operation / monitoring having a function of the interlock diagnosis means and a function of displaying the interlock diagnosis screen on a general operator operation / display device operated by an operator in a plant cab A plant control system provided with means is provided.

  In the present invention, as described above, even when the interlock condition used by an arbitrary plant control means is interfaced as a representative contact from another plant control means connected to the network, the representative contact is established by another plant control means. It also monitors the status of the establishment / non-establishment of each interlock condition, and displays it on the interlock diagnosis screen as one of the source factor contacts where the other interlock control conditions in other plant control means are not established. Even if the circuit is formed in multiple stages, it detects not only the first unsuccessful contact among the unsuccessful source factors but also the second, third, ..., nth unsuccessful contacts. Since it is displayed on the lock diagnosis screen, information on the interlock condition of the target equipment in a large-scale plant. The, it can be found quickly.

BRIEF DESCRIPTION OF THE DRAWINGS The conceptual diagram which shows the whole structure of Example 1 of this invention. The ladder circuit diagram which shows the example of the control program containing an interlock. Explanatory drawing which shows an example of the interlock diagnosis screen in Example 1, 2 of this invention. Explanatory drawing which shows an example of the interlock diagnosis screen in Example 3, 4 of this invention. Explanatory drawing which shows an example of the interlock diagnosis screen in Example 5,6,7,8 of this invention. Explanatory drawing which shows an example of the HMI screen and interlock diagnosis screen in Example 9, 10 of this invention. Explanatory drawing which shows an example of the interlock diagnosis screen in Examples 11 and 12 of this invention, and its operation method. Explanatory drawing which shows an example of the HMI screen and interlock diagnostic screen in Example 13, 14, 15, 16 of this invention.

Explanation of symbols

10 Control program editing means
11 Program compiler
12 Ladder / Logical expression converter
13 Program load client section
20 Interlock diagnosis means
21 Logic readout section
21 Interlocked client part
23 Factor identification formula conversion part
24 formula synthesis unit
25 Formula / Ladder converter
30 Database section
31 Source file section
32 Object file section
33 Logical file section
40 Object memory
41 Data memory
42 Code memory
50 Standard processing section
51 Code program server
52 Program execution processor
53 Process I / O processor
54 Interlock state reading server part
60 Screen operation display means
61 Screen program section
62 Database part

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Configuration of Example 1)
First, Embodiment 1 will be described with reference to FIGS.
FIG. 1 is an overall configuration diagram of a first embodiment of the present invention, and the first embodiment is generally composed of four parts. That is, a controller CONT1 as a plant control means, a computer COMP as a control program creation / display means, and a general operator operation / display device HMI (human machine interface device) operated by a driver in a plant cab ) And a conventional plant control system composed of a LAN (local area network) connecting the former, and a plurality of controllers CONT2, CONT3, ..., CONTn having the same functions as the controller CONT1 The plurality of controllers CONT2, CONT3,..., CONTn are also connected to the LAN.

  The controllers CONT1 and CONT2, CONT3,..., CONTn are roughly divided into two parts, and have an object memory 40 for storing control program objects and a standard processing unit 50 for writing, reading and executing these.

  The object memory 40 includes a data memory 41 and a code memory 42.

The data memory 41 includes internal data of an interlock diagnosis function block DIAG described later in addition to a normal interlock contact. The code memory 42 includes an internal code of the interlock diagnosis function block DIAG in addition to the normal program code.

  The standard processing unit 50 includes a program load server unit 51 for placing the object program of the control program sent via the LAN in the data memory 41 and the code memory 42, and the controllers CONT1, CONT2, CONT2, CONT3,. Control program, that is, a program execution processing unit 52 for executing a code memory, a process input / output processing unit 53 for providing process contacts from the plant to the control program, and an interlock circuit state during execution of the control program are read And an interlocking state reading server unit 54.

  On the other hand, the computer COMP is roughly divided into three parts, a control program editing means 10 for a system programmer to create a control program, a database unit 30 for storing the control program and interlock logical expressions, and a plant operator. Includes interlock diagnosis means 20 for knowing the cause of the failure of the interlock condition.

  The control program editing means 10 includes, as internal processing elements, a program compiler 11 for converting a control program source file into an object file, and a ladder for converting a specified interlock circuit in the control program into a logical expression. An (LD) / logical expression conversion unit 12 and a program load client unit 13 for sending an object file of the control program to the controller.

  The database unit 30 stores a source file unit 31 for storing a control program source file, an object file unit 32 for storing an object file of the control program, and a logical expression of a specified interlock circuit. The logical expression file unit 33. The source file unit 31 includes a source of an interlock diagnosis function block described later. The object file unit 32 includes internal data and codes of an interlock diagnosis function block described later.

  The interlock diagnosis unit 20 is composed of a logic operation unit and a display unit. The logical operation unit includes a logical expression reading unit 21 for reading out a logical expression of a specified interlock from a file, and an interlock state reading client for reading out past and current contact states of the specified interlock circuit from the controller. Unit 22, a factor specifying logical expression conversion unit 23 for specifying the cause of the failure of the interlock condition from the logical expression and its contact state, and a logical expression synthesizing unit 24 for combining the multi-stage logical expression into one logical expression And a logical expression / ladder (LD) conversion unit 25 for drawing a ladder circuit from the logical expression.

The display unit displays an operation result by the logic operation unit.
Furthermore, a general operator operation / display device HMI is roughly divided into two parts. The operator operation / monitoring means 60, which is a general function for the operator to operate and monitor the plant, is provided in the computer COMP. The interlock diagnosis unit 20 is equivalent to the interlock diagnosis unit 20 that performs the same function as the interlock diagnosis unit.

  The operator operation / monitoring means 60 is composed of a screen program unit 61 for storing a screen program for performing operation / monitoring necessary for plant operation, and a database unit 62 for storing data necessary for operation / monitoring information. Yes.

(Operation of Example 1)
The system programmer uses the control program editing means 10 to create a control program including an interlock circuit for plant equipment. FIG. 2 shows an example of a control program created using a ladder language defined in JISB3503 (or IEC61131-3). The content of the control program is to operate the rotating machine M30 in the interlock circuit of the upper controller CONT1. An interlock circuit and a start-up circuit are shown.

  An interlock circuit that outputs an interlock condition C5, an interlock circuit that outputs an operation condition RUN_PRM of M30, and a circuit of an M30 operation command M30_RUN are provided in order from the top of the control program shown in FIG.

  Further, in the interlock circuit in the lower controller CONT2, a circuit of the representative interlock condition X1 for interfacing with the controller CONT1 is provided.

  The top interlock circuit in FIG. 2 is composed of contacts B1, B2, B3, B4 and X1, an interlock diagnosis function block DIAG, and a coil C5. The contact C5 of the coil C5 is the second. Inserted into the M30 driving interlock circuit.

  The second M30 operation interlock circuit is composed of the contacts C1 to C7, the interlock diagnosis function block DIAG, and the coil RUN_PRM. The contact RUN_PRM of the coil RUN_PRM is the third M30 operation command circuit. Has been inserted.

  The M30 operation circuit includes contacts START_PB, START_PRM, STOP_PB, M30_RUN, RUN_RPM, and a coil M30_RUN.

  Furthermore, the lowest interlock circuit is composed of contacts D1, D2, D3, D4, D5, interlock diagnosis function block DIAG, and coil X1, and contact X1 of coil X1 is the top. It is interfaced with LAN via the LAN and imported.

  This interlock circuit has a feature that an interlock diagnosis function block DAIG is connected before the coil output. Referring back to FIG. 1, when the system programmer saves the control program, the control program is stored in the source file section 31 of the database section 30, and the source file generates the result generated by the program compiler 11 as the database section. It is saved as 30 object files 32.

  At this time, when the ladder / logical expression conversion unit 12 finds an interlock diagnosis function block, the ladder / logical expression conversion unit 12 searches for a ladder circuit connected to the input, generates an interlock logical expression, and generates a logical expression file of the database unit 30. Save as.

  After creating and saving the control program, the system programmer writes these to the controller CONT to execute the control program. When writing to the controller CONT, internally, the program load client unit 13 retrieves the object file 32 of the database unit 30, delegates it to the program load server unit 51 of the controller CONT via the LAN, and program load server 51 Is received and placed on the data memory 41 and the code memory 42 of the object memory 40, and the program execution processing unit 52 executes this to execute the control program.

  The contact of the interlock circuit and the contact of the coil are process contacts to be inputted / outputted from / to the outside of the controller CONT, which are supplied from the process input / output unit 53 to the program execution processing unit 52 and operate.

  FIG. 3 shows an interlock diagnosis screen, in which the conventional screen is shown in the upper part and the present invention is shown in the lower part in a contrast form. First, the upper part of FIG. 3 is a display example of a conventional interlock diagnosis screen by the interlock diagnosis means 20. In this display example, the logical address reading unit 21 is used to know the address in the controller of the function block for interlock diagnosis from the name of the corresponding interlock contact, and it is passed to the interlock state reading client unit 22 for the interlock state reading client unit. 22 delegates to the interlock state reading server unit 54 of the controller CONT via the LAN.

  As a result, the internal variables Permissive (current interlock status) and Time Stamp (previous occurrence time of previous interlock failure occurrence) of the interlock diagnostic function block being executed are acquired, and this is obtained for each field Live (current interlock status). By displaying in Faulted (presenting the latest latest interlock failure), the display of the circuit name list for interlock diagnosis is realized.

  In this [Live] field, when the relevant interlock condition is not satisfied at the present time, an interlock diagram of only the contact point that causes it is displayed as a ladder circuit.

  Further, in the [Faulted] column, the ladder circuit displays the contact point that was the trigger (first cause) for failure to establish the interlock when the corresponding interlock condition was not satisfied in the past latest.

  On the other hand, the lower part of FIG. 3 is a display example of an interlock diagnosis screen by the interlock diagnosis means 20 for the interlock circuit shown in FIG.

  Conventionally, when the interlock condition X1 used in the controller CONT1 is interfaced as a representative contact from another controller CONT2 connected to the network, and the representative contact X1 itself is not established, the interlock of the controller CONT1 On the interlock diagnosis screen indicating failure, the state of the representative contact X1 is displayed as it is.

  Here, the interlock diagnosis means 20 tracks the output source of the interlock condition X1 interfaced as a representative contact from another controller CONT2. When this is taken in from the controller CONT2 and a fixed interlock circuit is configured by the interlock diagnosis function block DIAG, the illegal interlock conditions C3 and C30 are detected in the interlock circuit in the controller CONT1. In the same way as above, the controller CONT2 finds the interlock condition D4 in which the representative contact X1 is not established, and replaces it with the [CONVERT CONDITION X1 from the controller CONT2 that is not established in the controller CONT1. ] Column.

(Effect of Example 1)
As shown in FIG. 2, the conventional apparatus provides a system programmer with a uniform and simple programming method of inserting an interlock diagnosis function block into an existing interlock circuit. As shown in the [Live] column of the interlock diagnosis screen, the current and past latest, the cause contact and trigger contact at the time of failure to interlock is provided as a ladder circuit to the plant operator in a form that can be understood with a glance .

  In other words, with the conventional interlock diagnosis function, plant operation support that responds simply to "why the operator has pressed the start button of the operation target device but cannot start it now" by presenting the current interlock failure. The plant operation support function that responds to the "why the operation target equipment has stopped but why it has stopped?" By presenting the interlock failure trigger factor, the plant operator realizes a plant operation support function that simply responds to "The operation target device has stopped, but what is the first cause?"

  In addition to this, the present invention can present the current interlock failure. That is, even when the interlock condition used by any controller is interfaced as a representative contact from other controllers in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means. The output source of the interlock condition is tracked, and the establishment / non-establishment state of each interlock condition for constructing the representative contact by another controller is simultaneously monitored. And, as one of the source factor contact of failure of interlock in any controller to be monitored, the current interlock at the final individual contact as shown in the interlock diagnosis screen [Live] column at the bottom of Fig. 3 Unsuccessful contact points can be presented.

  This expands the scope of monitoring targets and improves the operability of the monitoring function.Therefore, regardless of the construction status of the interlock contacts interfaced between multiple controllers in a large-scale plant, It is possible to provide a device that can quickly find current information on the interlocking conditions of the equipment to be operated.

  The lower part of FIG. 3 shows the [Faulted] column of the interlock diagnosis screen by the interlock diagnosis means 20 according to the second embodiment of the present invention.

  In the first embodiment, in the interlock diagnosis screen [Live] field in the lower part of FIG. 3, an interface used by an arbitrary controller in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means. Even when the lock condition is interfaced as a representative contact from another controller, the controller can monitor the status of each interlock condition that establishes the representative contact in the other controller. It is displayed as one of the source flow contact points where the interlock is not established.

  On the other hand, in the second embodiment, an arbitrary controller is used in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means in the interlock diagnosis screen [Faulted] field in the lower part of FIG. Even when the interlock condition is interfaced as a representative contact from another controller, the output source of this interlock condition is tracked, and the contact that is initially unsuccessful, that is, the trigger for non-successful interlock (first cause) and Provides a function to display the contact point that has become a ladder circuit.

  Similarly to the first embodiment, the interlock diagnosis unit 20 tracks the output source of the interlock condition X1 interfaced as a representative contact from another controller CONT2. When this is fetched from the controller CONT2 and a fixed interlock circuit is configured by the interlock diagnosis function block DIAG, the interlock conditions C3 and C30 which are not satisfied in the interlock circuit in the controller CONT1 are detected. In the same way as above, the controller CONT2 finds the interlock condition D4 where the representative contact X1 is not established, and if this triggers the failure of the interlock (first cause), the ladder is displayed in the interlock diagnosis screen [Faulted] field. Display as a circuit.

  This expands the scope of monitoring targets and improves the operability of the monitoring function.Therefore, regardless of the construction status of the interlock contacts interfaced between multiple controllers in a large-scale plant, It is possible to provide an apparatus that can quickly find out the interlock condition that is initially unsatisfied with respect to the interlock condition of the facility to be operated.

  FIG. 4 shows the contents of Embodiment 3 of the present invention, that is, the interlock diagnosis screen and the operation method thereof.

  In the first embodiment, in the interlock diagnosis screen [Live] field in the lower part of FIG. 3, an interface used by an arbitrary controller in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means. Even when the lock condition is interfaced as a representative contact from another controller, the controller can monitor the status of each interlock condition that establishes the representative contact in the other controller. It is displayed as one of the source factor contacts where interlock is not established.

  In the second embodiment, an arbitrary controller is used in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means in the interlock diagnosis screen [Faulted] field in the lower part of FIG. Even if the interlock condition to be interfaced as a representative contact from another controller, it is not established first by monitoring the establishment / non-establishment status of each interlock condition for constructing the representative contact in the other controller. The ladder circuit indicates that the contact has become a contact that has become a trigger (first cause) for failure of interlock.

  On the other hand, in the third embodiment, in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by any controller is interfaced as a representative contact from other controllers. Even if it is, the current interlock failure displayed in the [Live] column of the interlock diagnosis screen is also monitored by monitoring the establishment / non-establishment status of each interlock condition that establishes the representative contact with another controller. Select the variable detail information (Device Property) expansion function related to the name of the contact or the name of the latest contact that has not been interlocked displayed in the [Faulted] field of the interlock diagnosis screen, and the variable detail information screen for the corresponding variable. Expands, displays, and uses variable information (Cross-reference) expander Select, expand variable usages information screen of the corresponding variable, it provides a function of displaying.

  As a result, plant operators can collect detailed information on individual variables even from a huge amount of interlock circuits, quickly find information on the interlock conditions of the target equipment, and It is possible to provide a device that can quickly investigate the cause of the failure.

  The interlock diagnosis screen of FIG. 4 and the operation method thereof show the contents of the fourth embodiment of the present invention following the third embodiment of the present invention.

  In the third embodiment, in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, the interlock conditions used by any controller are interfaced as representative contacts from other controllers. Even in this case, the current interlock failure contact point displayed in the [Live] column of the interlock diagnosis screen is also monitored by monitoring the establishment / non-establishment state of each interlock condition that constructs the representative contact with another controller. Select the variable detail information (Device Property) expansion function related to the name of the contact or the name of the latest contact that has not been interlocked displayed in the [Faulted] field of the interlock diagnosis screen, and expand the variable detail information screen for the corresponding variable. , Display and select the variable usage location information (Cross-reference) expansion function. And, expand the variable use location information screen of the relevant variables, are displayed.

  On the other hand, in the fourth embodiment, in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller. Even if it is, the variable usage location information (Cross-reference) expansion function is selected, and the relevant interlock condition D4 is used in the other controller CONT2, for example, from the variable usage location information screen indicating the usage location of the relevant variable. Provides a function to directly expand and display existing programs.

  This enables plant operators to collect detailed information on individual variables from an actual program, even from a huge amount of interlock circuits, and quickly find information on the interlock conditions of the target equipment. Thus, it is possible to provide a device that can quickly investigate the cause of the failure of the interlock condition.

FIG. 5 shows the contents of Embodiment 5 of the present invention, that is, an interlock diagnosis screen.
In the first embodiment, on the interlock diagnosis screen [Live] column shown in the upper part of FIG. 3, when the relevant interlock condition is not satisfied at present, an interlock diagram of only the contact that causes the problem is displayed in a ladder circuit. In the [Faulted] column, the ladder circuit displays the contact point that was the last time the corresponding interlock condition was not satisfied, that is, the trigger (first cause) of the interlock failure.

On the other hand, in the fifth embodiment, in the [Live] column of the interlock diagnosis screen of FIG. 5, when the relevant interlock condition is not satisfied at present, an interlock diagram of only the contact point that causes it is displayed in a ladder circuit. Of these interlock conditions, the contact that has been the trigger (first cause) of the failure of the interlock in the past latest is displayed in [Faulted] (1st) in the ladder circuit, and further, the interlock diagnosis means 20 By tracking, monitoring and memorizing the repeated execution (scan) of the controller, the second, third and nth non-established contacts can be [Faulted] (2 ^nd ), [Faulted] (3 Provides a function to display in each column of ^rd ), ...

  As a result, the plant operator first becomes unsatisfied with the interlock condition of the target equipment in a large-scale plant by expanding the range of the monitoring target and improving the operability of the monitoring function. It is possible to provide a device that can quickly find out not only the interlock condition but also a process in which a plurality of interlock conditions are not satisfied.

The interlock diagnosis screen of FIG. 5 also shows the contents of the sixth embodiment of the present invention.
In the fifth embodiment, in the [Live] column of the interlock diagnosis screen of FIG. 5, when the relevant interlock condition is not satisfied at present, an interlock diagram of only the contact point causing the interlock condition is displayed by a ladder circuit. In the past, the contact that triggered the failure of the interlock in the past (first cause) is displayed in [Faulted] (1st) in the ladder circuit, and the second, third, and nth The contacts that are not established are displayed in the [Faulted] (2 ^nd ), [Faulted] (3 ^rd ),...

Example 6 In contrast, the interlock diagnosis screen of FIG. ^{5 [Faulted] (2 nd)} , [Faulted] (3 rd), in ... each column of a plurality of controllers connected to the network as a plant control means CONT1 , CONT2, CONT3, ..., CONTn, even if the interlock condition used by any controller is interfaced as a representative contact from another controller, the output source of this interlock condition is tracked, and the second, third In addition, it provides a function for displaying the nth non-contact point in a ladder circuit.

  Similarly to the first embodiment, the interlock diagnosis unit 20 tracks the output source of the interlock condition X1 interfaced as a representative contact from another controller CONT2.

When this is taken in from the controller CONT2 and the interlock diagnosis function block DIAG constitutes a fixed interlock circuit, the interlock conditions C3 and C30 that are not satisfied in the interlock circuit in the controller CONT1 are detected. Similarly, the controller CONT2 detects the interlock condition D4 where the representative contact X1 is not established, and if this is the second, third, and nth, the fault diagnosis screen [Faulted] ( 2 ^nd), is displayed in ^{[Faulted] (3 rd),} ... ladder circuit to each column of.

  This allows plant operators to expand the scope of monitoring and improve the operability of the monitoring function, thereby establishing the interlock contact status that is interfaced between multiple controllers in a large-scale plant. Regardless of the interlock condition that was initially not satisfied, the device that can quickly find a process in which a plurality of interlock conditions are not satisfied can be provided. .

The interlock diagnosis screen of FIG. 5 also shows the seventh embodiment of the present invention.
In the sixth embodiment, the interlock diagnosis screens [Faulted] (2 ^nd ), [Faulted] (3 ^rd ),... In FIG. , CONT3, ..., CONTn, even if the interlock condition used by any controller is interfaced as a representative contact from another controller, the output source of this interlock condition is tracked, and the second, third, and The contact that failed nth was displayed on the ladder circuit.

In the seventh embodiment, when a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller. In addition, even if this is the second, third, and nth failure, by monitoring the status of each interlock condition that establishes the representative contact with another controller, the interlock is established. Select the variable detailed information (Device Property) expansion function related to the contact name where the interlock is not established displayed in the ladder circuit in each column of [Faulted] (2 ^nd ), [Faulted] (3 ^rd ),. Then, expand and display the variable detail information screen of the corresponding variable, and select the variable usage location information (Cross-reference) expansion function. It provides a function to expand and display the variable usage location information screen of the corresponding variable.

  As a result, the plant operator expands the scope of monitoring and improves the operability of the monitoring function, so that individual variables can be obtained even from a large amount of interlock circuits in a large-scale plant. Detailed information about the system can be collected, and regardless of the construction status of the interlock contacts that are interfaced between multiple controllers, the process of rapidly losing multiple interlock conditions can be quickly found. By quickly finding information on the interlock condition of the equipment to be performed, it is possible to provide a device that can quickly investigate the cause of the failure of the interlock condition.

The interlock diagnosis screen of FIG. 5 also shows the eighth embodiment of the present invention.
In the seventh embodiment, when a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller. In addition, by monitoring whether the interlock condition that establishes the representative contact in other controllers is established or not, even if these are not established second, third, and nth, 5 Interlock diagnosis screen [Faulted] (2 ^nd ), [Faulted] (3 ^rd ), etc. Variable detail information (Device Property) related to the name of the contact that has not been interlocked displayed in the ladder circuit in each column , Expand and display the variable detail information screen for the corresponding variable, and expand the variable usage location information (Cross-reference) expansion function. The variable usage location information screen of the corresponding variable was expanded and displayed.

  On the other hand, in the eighth embodiment, in a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller. If these are not established in the second, third, and nth by monitoring the establishment / non-establishment of the individual interlock conditions for constructing the representative contact in the other controller. However, the interlock diagnosis screen [Faulted] (2nd), [Faulted] (3rd), ... The variable use location information (Cross-reference) expansion function to the contact name that is not established interlock in the ladder circuit in each column From the variable usage location information screen that indicates the usage location of the corresponding variable, for example, another controller CONT2 Provides a function to directly expand and display programs that use the interlock condition D4.

  This allows plant operators to collect detailed information on individual variables from an actual program, even in a huge amount of interlock circuits, quickly find information on the interlock conditions of the target equipment, An apparatus for quickly investigating the cause of the failure of the interlock condition can be provided.

  As a result, the plant operator expands the scope of monitoring and improves the operability of the monitoring function, so that individual variables can be obtained even from a large amount of interlock circuits in a large-scale plant. Detailed information on the system can be collected from the actual program, and the process in which multiple interlock conditions are not satisfied is quickly found regardless of the construction status of the interlock contacts interfaced between multiple controllers. However, by quickly finding information on the interlock condition of the target equipment, an apparatus capable of quickly investigating the cause of the failure of the interlock condition is provided.

  FIG. 6 also shows the ninth embodiment of the present invention, that is, its HMI screen and interlock diagnosis screen.

  In the first embodiment, in the interlock diagnosis screen [Live] column in the lower part of FIG. 3, an interlock used by an arbitrary controller in a plurality of controllers CONT1, CONT2, CONT3,. Even if the condition is interfaced as a representative contact from another controller, monitoring the status of each interlock condition that establishes the representative contact in the other controller also allows the interface in any controller to be monitored. It is displayed on the computer COMP of the control program creation and display means as one of the source factor contacts of the lock failure.

  On the other hand, in the ninth embodiment, the functions of the first embodiment are performed by a general operator operation / display device HMI. Since the operator operation / display device HMI includes the interlock diagnosis unit 20 equivalent to that provided in the computer COMP, the operator operation / display device HMI has a display function of the interlock diagnosis screen shown in FIG.

  Then, the interlock diagnosis means 20 of the operator operation / display device HMI is connected to the database section 30 of the computer COMP via the LAN so that the interlock diagnosis means 20 of the computer COMP refers to the logical expression file of the database section 30. In order to refer to the interlock condition stored as a logical expression file, that is, a list of coil variables, on the plant operation / monitoring screen, a list of circuit names subject to interlock diagnosis, and an interlock diagnosis screen selected from this list Can be displayed.

  FIG. 6 shows a plant operation / monitoring screen used by the operator to operate and monitor the plant with a general operator operation / display device HMI operated by the operator in the plant cab. An example is shown in which an interlock circuit that is not established is selected from the circuit name list screen of the interlock diagnosis target and the corresponding interlock diagnosis screen is displayed.

  As a result, as shown in FIG. 6, in the general operator operation / display device HMI operated by the driver, on the case of the plant operation / monitoring screen by the operator operation / monitoring means, the interlock diagnosis means In order to have a function to display a list of interlock diagnosis target circuits and an interlock diagnosis screen, the plant operator does not have to operate the computer COMP used by the system programmer when designing the program. Even without receiving the support, it is possible to directly monitor the state where the interlock is not established only by the operator operation / display device HMI which is always used by the plant operator.

  Also, the screen program for the interlock monitoring screen created exclusively by the operator operation / monitoring means is no longer necessary, and even if the interlock is changed, added, or deleted due to equipment modification, operator operation / monitoring is possible. The latest interlock state can always be displayed without changing the screen program of the means.

  FIG. 6 also shows a tenth embodiment of the present invention, that is, its HMI screen and interlock diagnosis screen.

  In the second embodiment, in the interlock diagnosis screen [Faulted] field in the lower part of FIG. 3, an interlock used by an arbitrary controller in a plurality of controllers CONT1, CONT2, CONT3,. Even if the condition is interfaced as a representative contact from another controller, the output of this interlock condition is also monitored by monitoring the establishment / non-establishment status of each interlock condition that constructs the representative contact in another controller. The original is traced, and the contact that first becomes unsuccessful, that is, the contact that becomes the trigger (first cause) of failure of interlock is displayed on the ladder circuit.

  On the other hand, in the tenth embodiment, as in the ninth embodiment, the functions of the second embodiment are performed by a general operator operation / display device HMI.

  This allows the plant operator to always use the operator operation and display equipment that is always used by the plant operator, regardless of whether the system programmer does not operate the computer COMP used to design the program or without assistance from the system programmer. Only the HMI expands the range of interlock non-monitoring targets and improves the operability of the monitoring function. Therefore, in the large-scale plant, it is related to the construction status of the interlock contacts interfaced between multiple controllers. It is possible to provide an apparatus for quickly finding out the interlock condition that is initially not satisfied with respect to the interlock condition of the target facility.

  FIG. 7 shows an eleventh embodiment of the present invention, that is, its interlock diagnosis screen and its operation method.

  In the third embodiment, when a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller However, in order to monitor the establishment / non-establishment status of each interlock condition that constructs the representative contact with other controllers, the name of the current non-interactive contact displayed on the interlock diagnosis screen [Live] field, Or, select the variable detailed information (Device Property) expansion function for the contact name of the latest interlock failure that was displayed in the [Faulted] field of the interlock diagnosis screen, expand and display the variable detailed information screen for the corresponding variable, Also, select the variable usage location information (Cross-reference) expansion function and The number of variables used parts information screen deployment, are displayed.

  On the other hand, in the eleventh embodiment, as in the ninth embodiment, the functions of the third embodiment are performed by a general operator operation / display device HMI.

  This allows the plant operator to always use the operator operation and display equipment that is always used by the plant operator, regardless of whether the system programmer does not operate the computer COMP used to design the program or without assistance from the system programmer. By using only the HMI, it is possible to collect detailed information on individual variables even from a huge amount of interlock circuits, quickly find information on the interlock conditions of the target equipment, and the interlock conditions are not satisfied. It is possible to provide a device capable of quickly investigating the cause.

  FIG. 7 shows a twelfth embodiment of the present invention, that is, its interlock diagnosis screen and its operation method.

  In the fourth embodiment, when a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller. However, select the variable usage location information (Cross-reference) expansion function, and from the variable usage location information screen that points to the usage location of the relevant variable, for example, the program that uses the interlock condition D4 in the other controller CONT2 Expanded and displayed directly.

  In contrast, in the twelfth embodiment, as in the ninth embodiment, the functions of the fourth embodiment are performed by a general operator operation / display device HMI.

  This allows the plant operator to always use the operator operation and display equipment that is always used by the plant operator, regardless of whether the system programmer does not operate the computer COMP used to design the program or without assistance from the system programmer. By using only the HMI, detailed information on individual variables can be collected from the actual program even from a huge amount of interlock circuits. Information on the interlock conditions of the target equipment can be quickly found and the interlock conditions It is possible to provide a device that can quickly investigate the cause of the failure.

  FIG. 8 shows an embodiment 13 of the present invention, that is, its HMI screen and interlock diagnosis screen.

In the fifth embodiment, in the [Live] column of the interlock diagnosis screen of FIG. 5, when the relevant interlock condition is not satisfied at present, an interlock diagram of only the contact point causing the interlock condition is displayed by a ladder circuit. In the past, the contact that triggered the failure of the interlock (first cause) is displayed in [Faulted] (1 ^st ) in the ladder circuit, and the second, third, and n The contact that failed the second time is displayed in the [Faulted] (2 ^nd ), [Faulted] (3 ^rd ),...

  On the other hand, in the thirteenth embodiment, as in the ninth embodiment, the functions of the fifth embodiment are performed by a general operator operation / display device HMI.

  This allows the plant operator to always use the operator operation and display equipment that is always used by the plant operator, regardless of whether the system programmer does not operate the computer COMP used to design the program or without assistance from the system programmer. Because the scope of monitoring is expanded only by the HMI and the operability of the monitoring function is improved, only the interlock condition that was initially not satisfied for the interlock condition of the target equipment in a large-scale plant. In addition, it is possible to provide an apparatus for quickly finding out a process in which a plurality of interlock conditions are not satisfied.

  FIG. 8 also shows a fourteenth embodiment of the present invention, that is, an HMI screen and an interlock diagnosis screen.

In the sixth embodiment, the interlock diagnosis screens [Faulted] (2 ^nd ), [Faulted] (3 ^rd ),... In FIG. In CONT3, ..., CONTn, even if the interlock condition used by any controller is interfaced as a representative contact from another controller, the output source of this interlock condition is tracked, and the second, third, and n The contact that failed the second time is displayed in the ladder circuit.

  On the other hand, in the fourteenth embodiment, as in the thirteenth embodiment, the functions of the sixth embodiment are performed by a general operator operation / display device HMI.

  This allows the plant operator to always use the operator operation and display equipment that is always used by the plant operator, regardless of whether the system programmer does not operate the computer COMP used to design the program or without assistance from the system programmer. The HMI alone expands the scope of monitoring targets and improves the operability of the monitoring function. Therefore, regardless of the construction status of the interlock contacts interfaced between multiple controllers in a large-scale plant. In addition to the interlock condition that is initially unsatisfied with respect to the interlock condition of the facility, it is possible to provide a device for quickly finding a process in which a plurality of interlock conditions are not satisfied.

  FIG. 8 also shows a fifteenth embodiment of the present invention, that is, an HMI screen and an interlock diagnosis screen.

In the seventh embodiment, when a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller. In addition, since the state of establishment / non-establishment of the individual interlock conditions for constructing the representative contact in other controllers is also monitored, even if these are not established second, third, and nth, FIG. Interlock diagnosis screen [Faulted] (2 ^nd ), [Faulted] (3 ^rd ), ... In each column, the variable detailed information (Device Property) expansion function related to the contact name where the interlock is not established is displayed in the ladder circuit Select, expand and display the variable detail information screen of the corresponding variable, and select the variable usage location information (Cross-reference) expansion function The variable usage location information screen of the corresponding variable is expanded and displayed.

  This allows the plant operator to always use the operator operation and display equipment that is always used by the plant operator, regardless of whether the system programmer does not operate the computer COMP used to design the program or without assistance from the system programmer. By expanding the scope of monitoring and improving the operability of the monitoring function using only the HMI, detailed information on individual variables can be obtained even from a huge amount of interlock circuits in a large-scale plant. Regardless of the construction status of the interlock contacts that are interfaced between multiple controllers, it is possible to quickly find the process in which multiple interlock conditions are not satisfied, and Interlock conditions are not satisfied because information on lock conditions can be found quickly. It is possible to provide a device for quickly investigating the cause.

  FIG. 8 also shows a sixteenth embodiment of the present invention, that is, an HMI screen and an interlock diagnosis screen.

In the eighth embodiment, when a plurality of controllers CONT1, CONT2, CONT3,..., CONTn connected to the network as plant control means, an interlock condition used by an arbitrary controller is interfaced as a representative contact from another controller. In addition, since the status of each interlock condition that establishes a representative contact with another controller is also monitored, the interlock diagnosis is performed even if the second, third, and nth conditions are not satisfied. screen ^{[Faulted] (2 nd),} [Faulted] (3 rd), ..., of the variables used point information to the name of the contact of the interlocking satisfied displayed (Cross-reference) expanded function in the ladder circuit in the columns From the variable usage location information screen that selects and indicates the usage location of the relevant variable, for example, in the other controller CONT2 Expand the program to lock conditions D4 is being used directly, are displayed.

  This allows plant operators to collect detailed information on individual variables from an actual program, even in a huge amount of interlock circuits, quickly find information on the interlock conditions of the target equipment, An apparatus for quickly investigating the cause of the failure of the interlock condition can be provided.

  The plant operator does not need to operate the computer COMP used by the system programmer when designing the program, and the operator's operation / display device is always used by the plant operator even without assistance from the system programmer. The HMI alone expands the scope of monitoring and improves the operability of the monitoring function, so detailed information on individual variables can be obtained even from a huge amount of interlock circuits in a large-scale plant. In addition, it can be collected from the above programs, and regardless of the construction status of the interlock contacts that are interfaced between multiple controllers, the process of quickly losing multiple interlock conditions can be used as a target. Quickly find information on equipment interlock conditions, so interlock conditions are not met It is possible to provide a device that can quickly determine the cause of the problem.

Claims (16)

Control program editing means for creating a control program including interlock conditions and interlock diagnosis;
A plurality of plant control means for executing a program object by the control program;
It has a logic operation unit and a display unit, and updates and displays the establishment / non-establishment of the interlock condition at a predetermined time before the present in any plant control means, and even if multiple stages of interlock circuits are formed In addition to the function to identify only the source factor contact and automatically display the interlock diagnosis screen in the graphical language, the interlock condition used by any plant control means is more representative than other plant control means connected to the network. Even when interfaced as a contact, it is possible to monitor individual interlock conditions in other plant control means by monitoring the establishment / non-establishment of the individual interlock conditions for constructing representative contacts in other plant control means. Has a function to display on the interlock diagnosis screen as one of the non-established source factor contacts Interlock diagnosis means
A plant control system. In the plant control system according to claim 1,
The interlock diagnosis means includes
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means It also has a function of detecting the first non-established contact and displaying it on the interlock diagnosis screen, including individual interlock conditions in other plant control means, by monitoring the establishment / non-establishment state of A plant control system characterized by that. In the plant control system according to claim 1,
The interlock diagnosis means includes
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the establishment / non-establishment status of each, the individual interlock conditions in other plant control means are also presented as one of the non-established source factor contacts, and detailed information is presented. A plant control system having a function of presenting program locations used in other plant control means. In the plant control system according to claim 1,
The interlock diagnosis means includes
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the status of establishment / non-establishment of each, the individual interlock conditions in other plant control means are also used as one of the source factor contacts that are not established, and this contact is used in other plant control means A plant control system having a function of directly displaying a corresponding program. In the plant control system according to claim 1,
The interlock diagnosis means includes
In addition to the function of identifying only the non-established source flow source contact even if the interlock circuit is formed in a plurality of stages, detecting the first non-established contact, and displaying it on the interlock diagnosis screen, the second, A plant control system having a function of detecting a third,..., Nth non-established contact and displaying it on the interlock diagnosis screen. The plant control system according to claim 5, wherein
The interlock diagnosis means includes
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring also the state of establishment / non-establishment, the individual interlock conditions in the other plant control means are also detected as contact points to be detected when the second, third,. A plant control system having a function of displaying on a lock diagnosis screen. The plant control system according to claim 6, wherein
Even if the interlock diagnosis means used by any plant control means is interfaced as a representative contact from another plant control means connected to the network, the other plant control means sets the representative contact. By monitoring the state of establishment / non-establishment of each interlock condition to be constructed, the individual interlock conditions in other plant control means become unsatisfied second, third,. When displayed on the diagnosis screen, the detailed information is presented directly from the display function of the source factor contact indicating the second, third,..., Nth failure, and the source factor contact that has failed is displayed. A plan having a function of presenting program locations used in other plant control means Control system. The plant control system according to claim 6, wherein
The interlock diagnosis means includes
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the establishment / non-establishment state of each, when each interlock condition in the other plant control means is not established second, third,..., Nth and is displayed on the interlock diagnosis screen. From the display function of the source factor contact indicating that the second, third,..., Nth failure has occurred, this contact directly displays the corresponding program used in the other plant control means. A plant control system comprising: In the plant control system according to claim 1,
In the plant operator's room, on the general operator operation / display device operated by the plant operator, the operator operation / display device has the function of the interlock diagnosis means and the function of displaying the interlock diagnosis screen. With monitoring means,
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means The interlock diagnosis screen is displayed on the screen of the operator operation / display device as one of the source factor contacts where the individual interlock conditions in other plant control means are also not established by monitoring the establishment / non-establishment state of A plant control system having a function of displaying on the screen. The plant control system according to claim 9, wherein
The operator operation / monitoring means includes:
Even if the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means In addition, by monitoring the establishment / non-establishment state, the first contact failure is detected, including individual interlock conditions in other plant control means, and the interlock diagnosis screen is displayed on the operator operation / display. A plant control system having a function of displaying on a screen of equipment. The plant control system according to claim 9, wherein
The operator operation / monitoring means includes:
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the establishment / non-establishment status of each of the plant control means, the individual interlock conditions in other plant control means are also one of the non-established source factor contacts. A plant control system having a function of presenting a program location used in a plant control means on the screen of the operator operation / display device. The plant control system according to claim 9, wherein
The operator operation / monitoring means includes:
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the status of establishment / non-establishment of each, the individual interlock conditions in other plant control means are also used as one of the source factor contacts that are not established, and this contact is used in other plant control means A plant control system having a function of directly displaying a corresponding program on a screen of the operator operation / display device. The plant control system according to claim 9, wherein
The operator operation / monitoring means includes:
Even if the interlock circuit is formed in multiple stages, only the failure source contact point is specified, the contact point that is not established first is detected, and the interlock diagnosis screen is displayed on the screen of the operator operation / display device. In addition to the display function, it has a function of detecting the second, third,..., Nth non-contact point and displaying the interlock diagnosis screen on the screen of the operator operation / display device. A plant control system characterized by The plant control system according to claim 13,
The operator operation / monitoring means includes:
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the establishment / non-establishment state of each, the interlock conditions in the other plant control means are also detected as contact points to be detected when the second, third,. A plant control system having a function of displaying a lock diagnosis screen on the screen of the operator operation / display device. The plant control system according to claim 14, wherein
The operator operation / monitoring means includes:
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the establishment / non-establishment state of each, when each interlock condition in the other plant control means is not established second, third,..., Nth and is displayed on the interlock diagnosis screen. From the display function of the source flow factor contact indicating the second, third,..., Nth failure, the detailed information and the failure source flow contact are used in other plant control means. A plan having a function of presenting a program location on the screen of the operator operation / display device Control system. The plant control system according to claim 14, wherein
The operator operation / monitoring means includes:
Even when the interlock conditions used by any plant control means are interfaced as representative contacts from other plant control means connected to the network, the individual interlock conditions for constructing the representative contacts by other plant control means By monitoring the establishment / non-establishment state of each, when each interlock condition in the other plant control means is not established second, third,..., Nth and is displayed on the interlock diagnosis screen. From the display function of the source factor contact that indicates that the second, third,..., Nth failure, the corresponding program in which this contact is used in other plant control means is A plant control system having a function of directly displaying on a screen of a display device.

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