PLC PLC Apparatus and method for managing firmware of Programmable Logic Controller system and the PLC system

摘要

The present invention relates to a firmware management apparatus and method for a PLC system, and to the PLC system. The firmware management device of the PLC system according to an embodiment of the present invention operates according to the command of the Programming And Diagnosis Tool (PADT), but diagnostics for each module of the PLC (Programmable Logic Controller) system and firmware update of each module are performed. MPU (Micro Processing Unit) to be controlled to be; An internal memory for storing information on each module obtained as a result of diagnosis; A buffer for storing an index of firmware applied to each module obtained as a result of diagnosis; And an external memory each having a management area in which various versions of firmware applied to each module are stored, and a restoration area in which the current firmware applied to each module is stored, wherein the MPU uses the firmware stored in the management area. Thus, the firmware update of the module to be updated is controlled to be performed, but the restoration area is generated or updated before the firmware update is performed.