Mitsubishi MELSEC Q Series Programming Manual page 1204

(1) Diagnostic information
Number Name
Diagnostic Diagnosis error
SD0
errors code
SD1
Clock time for Clock time for
SD2 diagnosis error diagnosis error
occurrence occurrence
SD3
App-196
Meaning
• This register stores the error code of an error detected by
diagnostics.
• Contents identical to latest fault history information.
This register stores the year (last two digits) and the month
when the SD0 data is updated in 4-digit BCD.
b15 to
Year (0 to 99) Month (1 to 12)
This register stores the day and the hour when the SD0 data is
updated in 4-digit BCD.
b15 to b8
Day (1 to 31) Hour (0 to 23)
This register stores the minute and the second when the SD0
data is updated in 4-digit BCD.
b15 to
Minutes (0 to 59) Seconds (0 to 59)
Explanation
(Example) October, 1995
b8 b7 to b0
(Example) 10 a.m. on 25th
b7 to b0
(Example) 35 min. 48 sec.
b8 b7 to b0
Set by
(When Set)
9510
H
S
(Error)
2510
H
3548
H
Corres-
Corres-
ponding
ponding
ACPU
CPU
D9
D9008
format
change
QCPU
LCPU
New