Mitsubishi Electric MELSEC iQ-R Series User Manual page 105

How to clear error history function
Error history and alarm history can be cleared using one of the following methods.
■Error history
• Power off the programmable controller.
• Reset the CPU module.
• Set Clear setting of error history (Un\G3930) to Clear (1), and turn on and off 'Error clear request' (YF) or 'Operating
condition setting request' (Y9).
■Alarm history
• Power off the programmable controller.
• Reset the CPU module.
• Set Clear setting of error history (Un\G3930) to Clear (1), and turn on and off 'Warning output clear request' (YE) or
'Operating condition setting request' (Y9).
Checking method
The start address of Error history where the latest error is stored can be checked in 'Latest address of error history' (Un\G1).
The start address of Alarm history where the latest alarm is stored can be checked in 'Latest address of alarm history'
(Un\G3).
Ex.
The following shows an example of when the 3rd error occurs. The 3rd error is stored in Error history No.3, and the value
3620 (start address of Error history No.3) is stored in 'Latest address of error history' (Un\G1).
'Latest address of error history'
(Un\G1): 3620
Un\G3600
Un\G3610
Un\G3620
Un\G3750
Error history No.1
1st error
Error history No.2
2nd error
Error history No.3
(Empty)
Error history No.16
(Empty)
Latest
3rd error
1.16 Error History Function
1
1 FUNCTIONS
103