Mitsubishi Electric MELSEC iQ-R Series User Manual page 39

How to clear the error history
The error history and alarm history can be cleared with one of the following methods.
• Power off the programmable controller.
• Reset the CPU module.
Check method
The start address of the error history where the latest error is stored can be checked in 'Latest address of error history'
(Un\G598). The start address of the alarm history where the latest alarm is stored can be checked in 'Latest address of alarm
history' (Un\G599).
Ex.
The following shows an example of when the third error occurs. The third error is stored in Error history 3, and the value 820
(start address of Error history 3) is stored in 'Latest address of error history' (Un\G598).
'Latest address of error history'
(Un\G598): 820
Un\G800
Un\G810
Un\G820
Un\G950
Error history 1
1st error
Error history 2
2nd error
Error history 3
(Empty)
Error history 16
(Empty)
Latest
3rd error
1.10 Error History Function
1
1 FUNCTIONS
37