Control system

A control system in factory automation (FA), the control system comprising:

• a control unit configured to perform a control operation for controlling an object to be controlled;
• and
• a security unit, connected to the control unit, that is responsible for a security function for the control system,
• wherein the control unit includes:
• a communication port configured to connect a second data transmission path configured to communicate between the control unit and the object to be controlled, and
• a first communication controller configured to connect a first data transmission path configured to communicate between the control unit and the security unit,
• wherein the security unit includes a second communication controller configured to connect the first data transmission path connected to the first communication controller, and a network controller configured to connect to an external network of the control system,
• wherein the control unit is configured to connect to the external network through the first and second communication controllers, the security unit and the network controller,
• wherein the security unit further includes at least one processor configured to:
• collect state information indicating an operating state of the control system, the state information including contents of a communication through the network controller or the second communication controller,
• sense an incident in the control system based on the collected state information, and
• output information for addressing the sensed incident, and
• wherein the first data transmission path through which the control unit communicates with the security unit is independent of the second data transmission path through which the control unit communicates with the object to be controlled.