Patent ID: 8483847

Claim:
A control system comprising: a first control module; a second control module; and a network connector configured to network-connect the first control module and the second control module, to disconnect the first control module and the second control module from an external network, and to build an internal network including the first control module and the second control module disconnected from the external network, or to enable communication between the first control module and the external network and to enable communication between the second control module and the external network, wherein the first control module is configured to control, via one or more first processors, the network connector, to build the internal network including the first control module and the second control module disconnected from the external network, and to designate, via an activation mode notification, one of a network activation mode and a local activation mode for the second control module, the second control module is configured to read, via one or more second processors, when the first control module designates the network activation mode, first firmware via the network connector and to be activated based on the first firmware, and is configured to read, when the first control module designates the local activation mode, second firmware from a memory and to be activated based on the second firmware, and the first control module is configured to enable communication with the external network via the network connector after completion of activation of the second control module.