Mitsubishi Electric MELSEC-L LD75P User Manual page 619

CHAPTER 13 COMMON FUNCTIONS
(2) Error history, warning history
Sixteen error history logs and sixteen warning history logs can be monitored. When the number of logs exceeds
16, the latest log overwrites the oldest log so that the latest 16 logs can be monitored all the time.
13
To monitor the error history and warning history, register the LD75 to the "Intelligent Function Module Monitor
Window".
For details on the registration method and monitoring method, refer to the following.
 GX Works2 Version 1 Operating Manual (Intelligent Function Module)
617