Mitsubishi Electric MELSEC Q Series Reference Manual page 514

(2) Checking the system error history of GX Works2
In the "Error History" window, error histories of other modules are also displayed in the list, which can be output
as a CSV file.
Error codes and a date and time of occurrence can be checked even after powering OFF and ON or resetting the
CPU module.
Open the "Error History" window in GX Works2.
[Diagnostics]
*1 The system error history of GX Works2 can be checked in the following versions of CPU module, CC-Link IE Controller
Network module and GX Works2.
CPU module
CC-Link IE Controller Network module
GX Works2
512
[System Monitor]
Item
Universal Model QCPU with first 5 digits of serial No. is 11043 or later
CC-Link IE Controller Network module with first 5 digits of serial No. is 12052 or
later
Version 1.12N or later
*1
button.
Version