CONTROL DEVICE, CONTROL METHOD, AND PROGRAM

The disclosure provides a control device (100) including a memory (106) storing address information (113) and a server section communicating with the external machine (300) serving as a destination of publishing the address information (113). The server section includes a determining section (154), a monitoring section (152), and an address managing section (156). The determining section (154) determines priority levels of publishing variables included in a control program (112) to the external machine (300) in accordance with a predetermined rule. The monitoring section (152) monitors free capacity of the memory (106). With respect to public variables for the external machine (300) among the variables included in the control program (112), the address managing section (156) adds logical addresses of the respective public variables to the address information (113) in order of the publishing priority levels as long as the free capacity does not fall below a predetermined threshold.