PROGRAMMABLE LOGIC CONTROLLER PERIPHERAL DEVICE

摘要

Provided is a PLC peripheral device capable of creating other sequence program portion by using a part of a sequence program. The PLC peripheral device includes: program block table creation means which creates a program block table correlating an identifier characterizing a sequence program portion to a used a part of a sequence program portion from a sequence program portion of use origin and a sequence program portion of use destination created by using the sequence program portion of the use origin; and affected portion data creation means which judges whether a part of the sequence program portion corrected is the part of the sequence program registered in the program block table and if yes, creates affected portion data indicating an affected portion which is affected by the correction according to the program block table.