Mitsubishi L Series User Manual page 122

(2) Checking error history
You can check the start address of the latest stored error at Latest address of error history (Un\G1800)
1. When the third error occurs:
Ex.
The third error is stored in error history No.3, and the value "1830" (start address of error history No.3) is stored to
Latest address of error history (Un\G1800).
Latest address of error history
(Un\G1800)
120
The start address of the error history
where the latest error is stored is stored.
Address
1810
Error history No.1
1st error
1820
Error history No.2
2nd error
1830
Error history No.3
(Empty)
1960
Error history No.16
(Empty)
Details of error history
An error history consists of the following
data.
Error code
First two digits Last two digits
of the year of the year
Month Day
Hour Minute
Second
Day of the week
New
3rd error
Error
occurrence
time