A program modification support device supports modifications of programs realizing functions of a process control system comprising a first process control device and a second process control device. The program modification support device includes a selector configured to select, from data used in a first program among the programs, data required to be maintained for continuing a first function when switching from the first process control device to the second process control device is performed, the first program being for realizing the first function required to be continued when the switching is performed.

A program fragmentation unit (131) divides a target program into fragments according to groups of processing. A fragment group extraction unit (132) extracts, from among sets of fragments, each set in which instruction groups match between fragments, as a fragment group. A functionalization candidate extraction unit (136) extracts, from among sets of fragment groups, a set in which instruction groups match between fragment groups, usage patterns of a variable group match between the fragment groups, and types of variables match between the fragment groups, as a functionalization candidate. An output unit (140) outputs information on the functionalization candidate.

A computer-implemented system and method for configuring a plurality of field devices enables a user to perform both device parameter editing and marking device parameters for bulk transfer in a simple an easy manner. The system and method provide a single application or utility that enables a user to view and make configuration changes as well as to view and change bulk transfer status for individual field device parameters while providing the user contextual information regarding the field device components to which the field device parameters belong or relate. The system and method provide the user with typical or standard configuration screens that enable the user to perform configuration activities in a simple and well-known format, but that include contextual indications of the various field device components to which the displayed field device parameters relate. This functionality enables the user to view and change the bulk transfer status of the individual parameters, without needing to go to a separate application or screen.

A computer-implemented system and method for configuring a plurality of field devices enables a user to perform both device parameter editing and marking device parameters for bulk transfer in a simple an easy manner. The system and method provide a single application or utility that enables a user to view and make configuration changes as well as to view and change bulk transfer status for individual field device parameters while providing the user contextual information regarding the field device components to which the field device parameters belong or relate. The system and method provide the user with typical or standard configuration screens that enable the user to perform configuration activities in a simple and well-known format, but that include contextual indications of the various field device components to which the displayed field device parameters relate. This functionality enables the user to view and change the bulk transfer status of the individual parameters, without needing to go to a separate application or screen.

The system program includes, as an execution control process of the control program, an owner-side start process that starts execution of an owner-side control program; a copy process in which, when execution of the owner-side control program ends, a global variable that is rewritten by the owner-side control program is copied from a global variable area to a synchronous buffer corresponding to the global variable; and a referrer-side start process that starts execution of a referrer-side control program.

A controller stores link information linking a predetermined event to a variable associated with the event. The controller stores first log information in association with time information into a memory in response to occurrence of the predetermined event. The first log information includes information about the event, and a current value of a predetermined variable associated with the event included in the link information. The controller stores second log information in association with time information into a memory in accordance with a predetermined period. The second log information includes information about a value of the predetermined variable. An information processing device obtains the link information from the controller, and displays information indicating the variable associated with an event indicated by the first log information onto the monitor-based on the link information and the second log information.