Omron Corporation

Kotaro Okamura

Yuta Nagata

Tomonari Inui

Yoshihide Nishiyama

Masanori Ota

Koji Yaoita

Minoru Oka

Yoshitaka Takeuchi

Masaru Nakasaki

Satoshi Kojima

Yasuo Muneta

Yutsuka Shigemori

Yutaka Tahara

Jintaro Deki

Naoki Hirobe

Masayuki Yamamoto

Tsuyoshi Okumura

Nagata Yuta

A control system includes a control unit configured to control a control object and communicate with an external device, and a relay unit configured to relay access from the external device to the control unit. The relay unit includes a reception unit configured to receive an authentication request from a request source, an authentication unit configured to authenticate validity of the request source upon receipt of the authentication request by the reception unit, and an access management unit configured to control a restriction level of access from the external device to the control unit when the validity of the request source is authenticated by the authentication unit.

Control system, relay device, and access management program

A control system for controlling a control target includes a database that holds one or more tables, a control apparatus that accesses the database, and an information processing apparatus that supports development of a user program executed in the control apparatus. The information processing apparatus acquires a column name and a data type of each column of a table, the table being selected from among the one or more tables, determines a data type of each member in correspondence with the acquired data type of each column, the data type being available in the user program, and displays a screen including the column name and the data type of each column, and the data type of each member brought into correspondence with the data type of each column.

Control system, information processing apparatus, and information processing program

A control system includes a database configured to hold one or more tables, and a control apparatus configured to execute a control program and access the database. The control system acquires a number of columns of a table and a data type of each column, the table being selected from among the one or more tables. The control system defines a structure that includes a number of members corresponding to the acquired number of columns and that is available in the control program. The control system determines a data type of each member of the structure in correspondence with the acquired data type of each column.

The present invention addresses the novel problem of protecting against threats that can arise as a result of the development of networked or intelligent control devices and control systems. This controller system includes: a control unit that executes a control operation for controlling a control target; and a security unit that is connected to the control unit and oversees and manages security functions for the controller system. The security unit includes a detection means that detects whether any unauthorized intrusion into the controller system has occurred. The control unit includes a command transmission means that transmits commands for changing the behavior of the detection means of the security unit.

Controller system

A controller that controls a control target includes one or more processors, a memory that stores a program to be executed by the processors, a communication interface that accesses a database, and a storage device. The one or more processors is programed to generate an SQL statement in accordance with a function block defined in a user program based on configuration information that defines a correspondence relationship between a data type of the user program and a data type of the database, send the generated SQL statement to the database when the execution result of the SQL statement indicates an error, associate the SQL statement with an execution result of the SQL statement sent to the database and store the same as an error log in the storage device, and send the error log to an information processing device in response to a request.

Control system, control method, and control program

A control system includes an information processing device that communicates with a controller that controls a control target. The controller or the information processing device include a storage device that stores one or more SQL statements to be executed and an execution result the one or more SQL statements in association with each other as log data. The information processing device includes a display controller that displays on a display an SQL statement to be corrected that has an unsuccessful execution result; an operation unit that accepts a correction operation on the SQL statement and an execution operation; and a communication interface that sends an execution instruction to execute the corrected SQL statement to the controller upon receipt of the execution operation and to receive an execution result of the corrected SQL statement from the controller. The display controller displays an execution result of the corrected SQL statement.

There has been desired a technique for creating a table on a database without formulating an SQL statement. A control program for a controller includes a generation module configured to output an SQL statement for creating, on a database, a table in which collection target variables included in the control program are stored. The generation module determines an identification name, on the database, of each collection target variable, identifies, based on a correspondence between a data type usable in the control program and a data type usable in the database, a data type on the database corresponding to the data type of the collection target variable in the control program, and generates the SQL statement based on the determined identification name and the identified data type.

Controller, control method, and control program for SQL statement generation in a factory automation database

There has been desired a technique for creating a table on a database without formulating an SQL statement. A control system includes a development support device and a controller. The development support device includes a development tool configured to accept, as setting information, a setting that designates collection target variables from among variables included in a control program, and a setting that designates an identification name, on a database, of each collection target variable. The controller includes a generation module-configured to output an SQL statement for creating a table on the database, based on a data type and an identification name on the database, the identification name being specified in the setting information.

Control system, controller, and control method

A control system includes a computer and at least one programmable logic controller connected to the computer. When the number of programmable logic controllers connected to the computer is one, the computer communicates with the connected programmable logic controller.

Apparatus and method for establishing communication between an operation terminal and a controller when only one controller is connected

The disclosure provides a control device including a memory storing address information and a server section communicating with the external machine serving as a destination of publishing the address information. The server section includes a determining section, a monitoring section, and an address managing section. The determining section determines priority levels of publishing variables included in a control program to the external machine in accordance with a predetermined rule. The monitoring section monitors free capacity of the memory. With respect to public variables for the external machine among the variables included in the control program, the address managing section adds logical addresses of the respective public variables to the address information in order of the publishing priority levels as long as the free capacity does not fall below a predetermined threshold.

Control device, control method, and non-transitory computer-readable recording medium

Provided is a technique enables programming, including that for database operations, without describing a SQL used to operate the database. A PLC () that can access a DBMS () stores a user program () and definition information (), the user program () including a structure type of variable, the definition information () indicating a definition of the structure type. The sequence command program () sequentially executes instructions in the user program () and invokes a DB access process program () in order to access the DBMS (). The DB access process program () reads the definition information () and, on the basis of the read definition information (), generates a SQL statement to be used when access to the DBMS () is made by execution of the user program (). The DB access process program () executes the generated SQL statement by transmitting the SQL statement to the DB server ().

Control device

A technique for facilitating debugging in a user program which operates by cooperation of a PLC and another system in a control system including a controller and another system. A CPU unit has a communication interface, executes a user program, calls DB connection service in accordance with an instruction included in the user program, and generates a statement to access a database device. In the DB connection service, operation is performed while switching a first mode and a second mode. In the first mode, a statement according to an access instruction is generated, the generated statement is transmitted to a database system, and a result of a response is sent to the user program. In the second mode, without transmitting the statement to the database device, a result of execution corresponding to the statement is sent to the user program.

Controller, information processing apparatus, and recording medium

A controller with enhanced reliability of access to a database system. A programmable logic controller (PLC) accessible to a database accesses a database (DB) server in response to an event in which a user program calls a DB access processing program. The DB access processing program stores status information indicating a status of accesses to the DB server in a nonvolatile memory, in accordance with an instruction of the user program. When a power interruption occurs, the PLC can obtain a status of accesses to the DB server at the timing of the occurrence of the power interruption by referring to the status information. Then, the PLC, for example, re-sends a structured query language (SQL) sentence, depending on the access status.

Controller with enhanced reliability

A simulation device for a programmable controller is formed by realizing by software on a computer a virtual PLC for emulating operations of a real PLC, a tool that functions as a development aid device for the virtual PLC and an error simulator for emulating an error that occurs in the virtual PLC. The virtual PLC and the error simulator are structured such that the simulation device is adapted to set, without any operations by the tool, a specified condition at a corresponding address in an error memory of the virtual PLC by carrying out a specified error selection operation and a specified operation regarding presence and absence of error generation, based on a list display of error items on the computer screen, after causing desired PLC type data stored in a PLC type memory in the virtual PLC through the tool.

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Kusatsu, Japan

Kotaro Okamura