Storage medium and PLC system construction support device

A non-transitory storage medium readable by a computer, the non-transitory storage medium storing a programmable logic controller system construction support program for creating a system configuration diagram depicting a configuration of a programmable logic controller system constructed, the programmable logic controller system construction support program causing the computer to perform:

• acquiring image data of an image of the programmable logic controller system;
• recognizing, from the image data, arrangement information indicating arrangement of units constituting the programmable logic controller system and information indicating features of the units, creating selected unit information by selecting each of the units, and creating system configuration information including the arrangement information and the selected unit information;
• creating a system configuration diagram based on the system configuration information;
• and
• performing display processing for displaying the system configuration diagram on a display section, wherein
• from the information indicating the features of the units included in the image data and from unit information stored in a storage and including feature information of units selectable for constructing a programmable logic controller system, match degrees between the units included in the image data and the unit information are calculated, and the selected unit information including the match degrees is created.