Control system, relay device, and relay program

A relay device disposed in a control system,

• the control system including:
• a control unit configured to execute a control program controlling a control target while managing a plurality of pieces of process data referred to or updated in the control program;
• a transmission unit configured to generate and transmit a data set including a value of at least part of the process data of the plurality of pieces of process data managed by the control unit;
• and
• an application execution unit configured to execute an application by referring to a data set transmitted by the transmission unit,
• the relay device being configured to arbitrate the data set exchanged between the transmission unit and the application execution unit,
• the relay device comprising:
• a first acquisition unit configured to acquire information about the plurality of pieces of process data managed by the control unit;
• a second acquisition unit configured to acquire information about the application executed by the application execution unit;
• a determination unit configured to determine the process data to be included in the data set based on the information about the plurality of pieces of process data acquired by the first acquisition unit and the information about the executed application acquired by the second acquisition unit;
• and
• a notification unit configured to notify each of the transmission unit and the application execution unit of a content of the process data to be included in the data set determined by the determination unit.

A non-transitory computer-readable storage medium storing a relay program executed by an information processing device disposed in a control system,

• the control system including:
• a control unit configured to execute a control program controlling a control target while managing a plurality of pieces of process data referred to or updated in the control program;
• a transmission unit configured to generate and transmit a data set including a value of at least part of the process data of the plurality of pieces of process data managed by the control unit;
• and
• an application execution unit configured to execute an application by referring to a data set transmitted by the transmission unit,
• the relay program causing the information processing device to function as a relay device that arbitrates a data set exchanged between the transmission unit and the application execution unit,
• the relay program causing the information processing device to execute:
• acquiring information about the plurality of pieces of process data managed by the control unit;
• acquiring information about an application executed by the application execution unit;
• determining the process data to be included in the data set based on the acquired information about the plurality of pieces of process data and the acquired information about the acquired and executed application;
• and
• notifying each of the transmission unit and the application execution unit of a content of the process data to be included in the determined data set.