CONTROLLER, CONTROL SYSTEM, PROGRAM, AND INFORMATION PROCESSING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a technique for facilitating programming that involves access to a database system in control programming of PLC or the like.SOLUTION: A PLC that can access a database is connected with an information processing device for generating a user program. The information processing device generates connection setting information which indicates setting for establishing communication connection of the PLC with a database system, by receiving a user operation or the like; and stores the generated connection setting information in the PLC. The information processing device transmits an instruction for connection confirmation about whether or not the PLC is connected to the database system, to the PLC. In response to the instruction, the PLC attempts to connect with the database system by performing communication according to the connection setting information. The PLC transmits to the information processing device: the result of the confirmation about whether or not it is connected to the database system; and error contents if an error has occurred.