CONTROL SYSTEM AND PROGRAMMABLE LOGIC CONTROLLER

摘要

A control system having a programmable logic controller (3) and a programmable logic controller (4), wherein the programmable logic controller (3) has a firmware update setting storage unit (302) for storing the firmware update setting of the programmable logic controller (4) that is the information designating a firmware version after an update and a firmware data storage unit (303) for storing firmware data, and the programmable logic controller (4) has a firmware update setting processing unit (401) for acquiring firmware update setting and firmware data from the programmable logic controller (3) and a firmware update execution unit (411) for updating firmware with a version designated by the firmware update setting in accordance with the firmware update setting and using the firmware data.