Mitsubishi Electric MELSEC-L Series LD40PD01 User Manual page 62

Ex.
The following shows the case in which the 17th error has occurred. The 17th error is stored in Error history No. 1 and 8010
(start address of Error history No. 1) is overwritten to Latest address of error history (Un\G8000).
Latest address of error history
(Un\G8000)
If the storage areas of the error history become full, the value in Error history No. 1 (Un\G8010 to Un\G8019)
is overwritten and sequentially thereafter to keep registering errors. (The errors before the overwriting are
deleted.)
7 FUNCTIONS
60
7.2 Error History Function
Address
8010
Error history No.1
1st error
8020
Error history No.2
2nd error
8030
Error history No.3
3rd error
8160
Error history No.16
16th error
Latest
17th error
The 17th error is stored in Error history No.1
and the 1st error history will be erased.