A control system includes a control device. The control device has a first communication unit and a second communication unit respectively connected to distinct networks distinct from each other, and a timer that manages a time-indicative value. The control device collects first communication data transmitted and/or received by the first communication unit, associates the collected first communication data with a value indicating a time point at which this communication data is transmitted and/or received, and stores the resulting first communication data. The control device collects second communication data transmitted and/or received by the second communication unit, associates the collected second communication data with a value indicating a time point at which this communication data is transmitted and/or received, and stores the resulting second communication data.

A control system includes a control device. The control device has a first communication unit and a second communication unit respectively connected to distinct networks distinct from each other, and a timer that manages a time-indicative value. The control device collects first communication data transmitted and/or received by the first communication unit, associates the collected first communication data with a value indicating a time point at which this communication data is transmitted and/or received, and stores the resulting first communication data. The control device collects second communication data transmitted and/or received by the second communication unit, associates the collected second communication data with a value indicating a time point at which this communication data is transmitted and/or received, and stores the resulting second communication data.

An edge device includes a first communications connection to a public first network, a plurality of second communications connections to a second network, i.e., a private industrial network, and application software that is loadable via the first connection into the edge device, wherein the edge device is configured such that the plurality of second communications connections are configurable via the application software for redundant operation of the second network in accordance with an industrial redundancy protocol, and the application software executes redundancy functions of the redundancy protocol, such that a quick and simple way of providing, changing or retrofitting redundancy functions for a redundantly operated industrial communications network is hereby possible.

To provide a manufacturing system that is capable of still continuing work in a case in which a failure occurs in the network connection between the centralized management apparatus and a manufacturing line and a control method of the manufacturing system. When activation of all of the work machines (a screen printer, and the like) in a manufacturing line is completed, a line management device acquires, from a centralized management apparatus, material data and control data required in one day of manufacturing of the manufacturing line. Further, in a case in which a failure in a wide area network that connects the line management device and a centralized management apparatus is detected, the line management device causes a manufacturing work of mounting boards by a work machine to be continued on the basis of the control data, and the like, corresponding to one day, which is saved in advance.

To provide a manufacturing system that is capable of still continuing work in a case in which a failure occurs in the network connection between the centralized management apparatus and a manufacturing line and a control method of the manufacturing system. When activation of all of the work machines (a screen printer, and the like) in a manufacturing line is completed, a line management device acquires, from a centralized management apparatus, material data and control data required in one day of manufacturing of the manufacturing line. Further, in a case in which a failure in a wide area network that connects the line management device and a centralized management apparatus is detected, the line management device causes a manufacturing work of mounting boards by a work machine to be continued on the basis of the control data, and the like, corresponding to one day, which is saved in advance.

A numerical controller includes a numerical control unit, a DNC operation management unit, and first and second communication units. The first and second communication units receive the same NC program from a host through corresponding communication paths. The DNC operation management unit acquires the NC program from a reception data buffer included in one of the communication units to transfer the NC program to the numerical control unit, and when a failure occurs in the communication path used by the communication unit, an acquisition destination of the NC program is switched to a reception data buffer of the other communication unit.