| 摘要 |
The present invention relates to a PLC data log module with a backup function. The PLC data log module generates log data based on a device value of a CPU in a PLC, which is collected when a set condition is met, and transmits the log data to an external memory. The PLC data log module comprises: an internal memory for storing the log data and transmitting the stored log data to the external memory; a backup memory for backing up the log data transmitted from the internal memory to the external memory and storing the backup data; and a control unit for controlling the backup memory and allowing the backup data stored in the backup memory to be transmitted to the external memory, when the PLC is turned off and then turned on, or is reset. |
