Mitsubishi Electric MELSEC iQ-R Series User Manual page 94

Error history
Up to 16 errors that occurred in the module are recorded.
Ex.
For error history 1
b15
Un\G800
Un\G801
Un\G802 First two digits of the year
Un\G803
Un\G804
Un\G805
Millisecond (upper)
Un\G806
Un\G807
Un\G809
Item
Error channel
Error code
First two digits of the year
Month
Hour
Second
Day of the week
Millisecond (higher-order digits)
Millisecond (lower-order digits)
System area
*1 Values stored when an overflow error (error code: 1900H) occurs on CH1 at 12:34:56.789 on Wednesday, October 31st, 2018.
■Buffer memory addresses
The following shows the buffer memory addresses of this area.
Buffer memory name
Error history
APPX
92
Appendix 3 Buffer Memory Areas
... b8 b7
Error channel
Error code
Month
Hour
Second
System area
Stored data
Stores the number of the channel on which the error occurred.
Stores the error code.
Last two digits of the year Stored in BCD code.
Day
Minute
One of the following values is stored in BCD code.
Sunday: 0, Monday: 1, Tuesday: 2, Wednesday: 3,
Thursday: 4, Friday: 5, Saturday: 6
Stored in BCD code.

No.1 to No.16
800 to 959
... b0
Last two digits of the year
Day
Minute
Day of the week
Millisecond (lower)
*1
Example of stored data
1H
1900H
2018H
1031H
1234H
56H
3H
7H
89H
