To provide a programmable controller capable of displaying properties, such as the version and update date and hour of a performance program stored in the programmable controller on a program preparation support device to be used at the time of preparing a program in a short period of time, the program preparation support device and a program preparation support method.

The programmable controller is provided with a property storage area for storing a property of an performance program apart from an performance program storage area for storing the performance program, and the property of the performance program with the performance program are made to be transferrable between the programmable controller and the program preparation support device and stored in the respective storage areas.