A support device capable of communicating with a control device network-connected to one or a plurality of safety devices , wherein each of the one or plurality of safety devices is configured to hold setting identification information that identifies the setting of the own device; the control device is configured to hold, for each of the one or plurality of safety devices , connection setting information set for establishing a connection with the safety device ; the one or plurality of safety devices include a target safety device for which a first establishment method has been set, wherein the first establishment method establishes a connection with the control device in accordance with a result of a comparison between the connection setting information and the setting identification information ; the support device is characterized by comprising: a memory part for storing a support program that is configured to assist in the setting of the control device ; and a processor for executing the support program ; and the support program comprises: a first command for acquiring the setting identification information from the target safety device ; and a second command for setting, in the connection setting information corresponding to the target safety device , the setting identification information acquired from the target safety device in response to the execution of the first command. each of the one or plurality of safety devices is configured to hold setting identification information that identifies the setting of the own device; the control device is configured to hold, for each of the one or plurality of safety devices , connection setting information set for establishing a connection with the safety device ; the one or plurality of safety devices include a target safety device for which a first establishment method has been set, wherein the first establishment method establishes a connection with the control device in accordance with a result of a comparison between the connection setting information and the setting identification information ; the support device is characterized by comprising: a memory part for storing a support program that is configured to assist in the setting of the control device ; and a processor for executing the support program ; and the support program comprises: a first command for acquiring the setting identification information from the target safety device ; and a second command for setting, in the connection setting information corresponding to the target safety device , the setting identification information acquired from the target safety device in response to the execution of the first command. a memory part for storing a support program that is configured to assist in the setting of the control device ; and a processor for executing the support program ; and the support program comprises: a first command for acquiring the setting identification information from the target safety device ; and a second command for setting, in the connection setting information corresponding to the target safety device , the setting identification information acquired from the target safety device in response to the execution of the first command. a first command for acquiring the setting identification information from the target safety device ; and a second command for setting, in the connection setting information corresponding to the target safety device , the setting identification information acquired from the target safety device in response to the execution of the first command. <EOS>