Abstract: A control device performs logging of information related to communication with an instrument and logging of information related to control of the logging operation. The control device includes: a first connector that connects a first network to which a control target belongs; a second connector that connects a second network to which an external instrument belongs; a control arithmetic unit that executes control arithmetic processing using data related to the control target, a communication unit that exchanges the data with the external instrument by secure communication through the second network; a first logging unit that logs information related to the secure communication performed by the communication unit; and a second logging unit that logs information related to control of a logging operation of the first logging unit.

Abstract: A control device performs logging of information related to communication with an instrument and logging of information related to control of the logging operation. The control device includes: a first connector that connects a first network to which a control target belongs; a second connector that connects a second network to which an external instrument belongs; a control arithmetic unit that executes control arithmetic processing using data related to the control target, a communication unit that exchanges the data with the external instrument by secure communication through the second network; a first logging unit that logs information related to the secure communication performed by the communication unit; and a second logging unit that logs information related to control of a logging operation of the first logging unit.

Abstract: 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.

Abstract: There is expected a technique for restricting a server function without affecting a driving machine in the case where memory usage is increased. A controller includes a memory, a program execution section controlling a driving machine in accordance with a control program, and an OPC-UA server communicating with an external machine. The OPC-UA server includes: a function execution section, executing a function utilizing a memory region on the memory in response to a request from the external machine; a monitoring section monitoring usage of the memory; and a restriction section, stopping the above function of the OPC-UA server based on the fact that the usage has exceeded a predetermined threshold.

Abstract: 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.

Abstract: A programmable controller system, a tool device, a tool program, a storage medium, and a programmable controller capable of affording greater convenience in terms of preventing unauthorized use of user program running on the programmable controller. In the programmable controller system, the tool device sets up a first user program execution ID in a second non-volatile memory provided in the PLC and sets up a second user program execution ID in a project provided in the tool device. The PLC performs a matching operation to determine whether or not the first user program execution ID matches the second user program execution ID and blocks the execution of the user program if there is a mismatch.

Abstract: A programmable controller system, a tool device, a tool program, a storage medium, and a programmable controller capable of affording greater convenience in terms of preventing unauthorized use of user program running on the programmable controller. In the programmable controller system, the tool device sets up a first user program execution ID in a second non-volatile memory provided in the PLC and sets up a second user program execution ID in a project provided in the tool device. The PLC performs a matching operation to determine whether or not the first user program execution ID matches the second user program execution ID and blocks the execution of the user program if there is a mismatch.

Abstract: A control system includes a programmable controller having a CPU unit that carries out cyclic operations of processes. An additional temporary user memory is provided in addition to a regular user memory. When an on-line editing of a user program is to be carried out, the program is stored in both memories and the program stored in the temporary memory is called by an instruction execution engine to be executed. After the on-line editing is completed on the user program stored in the user memory, the program execution is based on the edited user program stored in the user memory.

Abstract: A logical name of shared data is defined. A network system comprises a communication portion for exchanges of data with other control apparatuses; a link memory (15) for storing data shared through the network; an indirect reference table (16) for storing logical names and the pointers used to access data stored in the link memory; and a database (17) of variables in which logical names are associated with memory addresses in the indirect reference table storing the pointers of the logical names. A control execution portion (18) accesses the link memory through the indirect reference table based on a logical name so that there is no need to know the specific memory location. Specifically, the user program contains logical names and no addresses (pointers) storing data.

Abstract: Controllers 11a, 11b that operate and execute a program programmed by a variable name and communication units 12a, 12b that communicate with other nodes connected to a network are provided. The controllers store and retain a variable table that associates the variable name with a real address that identifies an area in which data corresponding to the variable name is stored, and the communication units store and retain communication setup information that identifies a variable name that is a subject of communications with other nodes. When a system starts up, the communication units independently solve by making an inquiry to the controllers about a real address corresponding to the variable name stored in the communication setup information, and store and retain a temporary internal table that associates the variable name with the real address.

Abstract: A control system includes a programmable controller having a CPU unit that carries out cyclic operations of processes. An additional temporary user memory is provided in addition to a regular user memory. When an on-line editing of a user program is to be carried out, the program is stored in both memories and the program stored in the temporary memory is called by an instruction execution engine to be executed. After the on-line editing is completed on the user program stored in the user memory, the program execution is based on the edited user program stored in the user memory.