PLC DATA LOG MODULE WITH BACKUP FUNCTION

摘要

A PLC data log module with backup function is proposed, the module including an internal memory configured to store the log data and to transmit the stored log data to the external memory, a backup memory configured to back-up the log data transmitted from the internal memory to the external memory and to store the backup data, and a controller configured to transmit the backup data stored in the backup memory to the external memory by controlling the backup memory when the PLC is turned off or reset.

主权项

1. A PLC data log module with backup function configured to generate a log data based on a PLC CPU's device value collected when a set condition is met and transmit the generated log data to an external memory, the PLC data log module comprising:
an internal memory configured to store the log data and to transmit the stored log data to the external memory; a backup memory configured to back-up the log data transmitted from the internal memory to the external memory and to store the backup data; and a controller configured to transmit the backup data stored in the backup memory to the external memory by controlling the backup memory when the PLC is reset or the PLC become a turned-on state from a turned-off state.