Programmable logic controller configured to back up transmission destination mail address data and restore the transmission destination mail address data during reoperation

摘要

A programmable logic controller includes: a parameter storage ROM to store transmission destination mail address data set as a parameter; a communication processing unit to acquire the transmission destination mail address data from an external apparatus; an internal device being a storing unit for storing the transmission destination mail address data acquired by the communication processing unit; an internal memory to store the transmission destination mail address data in the internal device when the transmission destination mail address data in the internal device is added data; a Flash ROM to store backup data of the transmission destination mail address data stored in the internal memory, and an arithmetic processing unit to perform processing for backing up, in the Flash ROM, the transmission destination mail address data acquired from the external apparatus and performs, in reoperation, processing for writing, in the internal memory.